JP2001053523A - Antenna system and portable radio equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid deterioration of speaking quality by feeding power to a composite antenna, formed of a first and third antenna elements and a second antenna element at the time of pushing in the first antenna element and feeding power to a composite antenna, forming by the first and second antenna elements and the third antenna element at the time of drawing out. SOLUTION: A second helical antenna 57 is arranged in the neighborhood of an upper end 27C of the inside of a rear side surface 27B of a housing case 27 with the center axis of the antenna 57 nearly coincident with the extension line of a first center axis. At pushing in of a second antenna, a fourth power feeding member 62 is electrically connected to a second power feeding member 59 to electrically connect the antenna 57 and a rod antenna 60 to form a composite antenna. At drawing out the second antenna, a third power feeding member 61 is electrically connected to a first power feeding member 58 to form a composite antenna. A balun 38 prevents leaked current from flowing from the composite antenna.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device and a portable wireless device, and is suitably applied to, for example, a portable telephone.

[0002]

2. Description of the Related Art Conventionally, in this type of portable telephone,
The size and weight have been reduced to improve portability. Along with this, whip antenna type antenna devices provided in mobile phones have been actively developed,
As this type of mobile phone, there is a mobile phone configured as shown in FIGS.

In the portable telephone 1 having such a configuration, a whip antenna type antenna device 3 is provided in a housing case 2 made of a non-conductive material such as a synthetic resin.

The antenna device 3 has an antenna unit 6 provided with a rod antenna 4 made of a conductive rod-shaped wire and a helical antenna 5 formed by spirally winding a conductive wire. The direction in which the antenna section 6 is pushed into the inside of the housing case 2 indicated by an arrow a at the upper end 2A of the housing case 2 (hereinafter referred to as the pushing direction) and the opposite direction of the housing case 2 Direction from the inside to the outside (hereinafter referred to as the drawing direction)
Are provided so as to be able to be pushed in and pulled out along the line.

In the antenna section 6, a first feeding member 7 made of a conductive material and having a projection 7A is electrically and mechanically connected to the lower end of the rod antenna 4, and is connected to the upper end of the rod antenna 4. A connection portion 8 made of a non-conductive material is mechanically connected.

A second power supply member 9 made of a conductive material is electrically and mechanically connected to the lower end of the helical antenna 5, and the second power supply member 9 is mechanically connected to the connection portion 8. I have. Thus, in the antenna section 6, the lot antenna 4 and the helical antenna 5 are mechanically connected by the connection section 8, but are electrically separated.

The rod antenna 4 is covered with a rod antenna cover 10 and the helical antenna 5 is formed as a cap-shaped helical antenna cover 11.
It is stored so that it does not directly touch the human body.

On the other hand, a circuit board (not shown) on which various circuit elements such as a transmission / reception circuit 12 and a matching circuit 13 are mounted, and a ground member made of a conductive material which covers the circuit board are provided inside the housing case 2. And a shield case (not shown).

An antenna feed terminal 14 made of a conductive material electrically connected to the matching circuit 13 is provided inside the upper end 2A of the housing case 2. When the antenna unit 6 is pushed in and pulled out, the antenna feed terminal 14 is provided. 14 is electrically connected to only one of the rod antenna 4 and the helical antenna 5.

In practice, in the antenna device 3, when the antenna section 6 is pushed in, the helical antenna cover 11
Is pushed in the pushing direction and hits the upper end 2 </ b> A of the housing case 2, the rod antenna 4 is inserted into the housing case 2.
Is pushed in and stored, and at this time, the second power supply member 9 is electrically connected to the antenna power supply terminal 14.

In the antenna device 3, the transmitting / receiving circuit 12, the matching circuit 13, the antenna feed terminal 14
And the helical antenna 5 via the second power feeding member 9 sequentially.
Helical antenna 5 is operated as an antenna.

At this time, in the antenna device 3, the rod antenna 4 is connected to the antenna feed terminal 1 by the connecting portion 8.
4 so as not to operate as an antenna.

On the other hand, in the antenna device 3,
When the antenna unit 6 is pulled out, the second antenna cover 1 is held in a state where the rod antenna 4 is housed inside the housing case 2.
When the pin antenna 1 is pinched and pulled in the pull-out direction, the rod antenna 4 is pulled out from the upper end 2A of the housing case 2 and the projection 7A of the first power supply member 7 is abutted against the antenna power supply terminal 14. Thereby, the first power supply member 7 is electrically connected to the antenna power supply terminal 14.

In the antenna device 3, the transmitting and receiving circuit 12, the matching circuit 13, the antenna feed terminal 14
The rod antenna 4 is operated as an antenna by being sequentially fed to the rod antenna 4 via the first feeding member 7.

At this time, in the antenna device 3, the helical antenna 5 is electrically separated from the antenna feed terminal 14 by the connecting portion 8 so as not to operate as an antenna.

Incidentally, when the rod antenna 4 and the helical antenna 5 are each operated as an antenna,
The matching circuit 13 matches the impedance of the rod antenna 4 and the helical antenna 5 with the unbalanced transmission line 16.

The shield case functions as a ground for various circuit elements, and also prevents external noise radio waves and radio waves radiated from the antenna unit 6 from entering the various circuit elements mounted on the circuit board. It also functions as an electrical shield.

As a result, in this portable telephone 1,
When the antenna section 6 is pulled out, the rod antenna 4 is pulled out from the housing case 2, and a transmission signal composed of a high-frequency signal is transmitted from the transmission / reception circuit 12 to the rod antenna 4 via the matching circuit 13, and is transmitted through the rod antenna 4. And transmits a transmission signal to a base station (not shown), and a reception signal composed of a high-frequency signal transmitted from the base station and received by the rod antenna 4 via a matching circuit 13.
Can be sent to

In the portable telephone 1, when the antenna section 6 is pushed in, the rod antenna 4 is housed inside the housing case 2 to prevent the portability from being impaired.
In this state, a transmission signal is transmitted from the transmission / reception circuit 12 to the helical antenna 5 via the matching circuit 13, and the transmission signal is transmitted to the base station via the helical antenna 5 and transmitted from the base station. Thus, the received signal can be transmitted to the transmission / reception circuit 12 via the matching circuit 13.

[0020]

The portable telephone 1 having such a configuration has an unbalanced transmission line 15 formed of, for example, a microstrip line formed on a circuit board. , And the rod antenna 4 or the helical antenna 5 are electrically connected via the matching circuit 13 in order, and the ground side of the unbalanced transmission line 15 is grounded to the shield case.

Therefore, in this portable telephone 1, FIG.
As shown in FIGS. 4 (A) and 4 (B), power is supplied to the rod antenna 4 or the helical antenna 5 from the transmission / reception circuit 12 via the hot side of the unbalanced transmission line 15 and the matching circuit 13 in this order. When the antenna 5 is operated as an antenna, a leakage current i1 flows from the ground side of the unbalanced transmission line 15 to the shield case 16, and the shield case 16 also operates as an antenna.

However, in such a mobile phone 1,
Since the shield case 16 operates as an antenna as described above, when the user grips the housing case 2, the hand covers the shield case 16 via the housing case 2, and as a result, the antenna characteristics of the mobile phone 1 are reduced. There was a problem of deterioration.

When the case 2 held by the user is brought close to the head, the head approaches the shield case 16 via the case 2, so that the antenna characteristics of the mobile phone 1 are further deteriorated. As a result, there is a problem that the call quality is reduced.

Further, when the shield case 16 is brought closer to the user's hand or head, the power per unit time / unit mass (so-called SAR (Specific Absorption Rate)) absorbed by a specific part of the human body increases accordingly. There was a problem to do.

The present invention has been made in view of the above points, and an object of the present invention is to propose an antenna device and a portable wireless device capable of greatly reducing a decrease in communication quality.

[0026]

According to the present invention, there is provided an antenna device comprising: a first antenna element provided so as to be able to be pushed and pulled out; and second and third fixed antenna elements. And an unbalanced transmission line for feeding power to the first, second, and third antenna elements, and a conversion action of balanced / unbalanced between the unbalanced transmission line and the second and third antenna elements. And a balance-unbalance conversion means to be applied. When the first antenna element is pushed in, the first antenna element is electrically connected to the third antenna element to form a first composite antenna. The second antenna element and the first composite antenna are fed from the transmission line via the balance-unbalance conversion means to operate as an antenna, and when the first antenna element is pulled out, the first antenna element is connected to the second antenna element. The second composite antenna is electrically connected to the second antenna element to form a second composite antenna, and the second composite antenna and the third antenna element are fed from the unbalanced transmission line via the balanced-unbalanced conversion means to operate as an antenna. I tried to make it.

As a result, when the second antenna element and the first composite antenna and the second composite antenna and the third antenna element are operated as antennas, respectively,
The second effect is obtained by the unbalance conversion operation of the unbalance conversion means.
To prevent leakage current from flowing from the antenna element or the first composite antenna to the ground member where the unbalanced transmission line is grounded via the unbalanced transmission line from the second composite antenna or the third antenna element. Thus, the ground member can be prevented from operating as an antenna, and the deterioration of antenna characteristics near the human body can be greatly reduced.

According to the present invention, in the antenna device, the first antenna element provided so as to be able to be pushed and pulled out, the second and third fixed antenna elements, the first, second and third antenna elements are provided. An unbalanced transmission line for feeding an antenna element, a balanced-unbalanced conversion unit for performing a balanced-unbalanced conversion operation between the unbalanced transmission line, the first, second, and third antenna elements; At the time of pushing and pulling out the first antenna element, any two of the first and second
And a connecting means for electrically connecting the third antenna element to the balanced-unbalanced conversion circuit. When the first antenna element is pushed, the first and second antenna elements are connected via the connecting means. Each is electrically connected to a balanced-to-unbalanced conversion circuit, and the first and second antenna elements are fed from the unbalanced transmission line via the balanced-to-unbalanced conversion means to operate as antennas, and to draw out the first antenna element. In some cases, the first and third antenna elements are electrically connected to the balanced / unbalanced conversion circuit via connection means, respectively, and the first and third antenna elements are connected from the unbalanced transmission line via the balanced / unbalanced conversion means. And fed to operate as an antenna.

As a result, when the first and second antenna elements and the first and third antenna elements are operated as antennas, respectively, the first and second antenna elements are converted into the first and second antenna elements by the balance-unbalance conversion operation of the balance-unbalance converter. Or a second antenna element;
This prevents leakage current from flowing from the first or third antenna element to the ground member to which the unbalanced transmission line is grounded via the unbalanced transmission line, thereby preventing the ground member from operating as an antenna. Thus, deterioration of antenna characteristics near the human body can be significantly reduced.

Further, according to the present invention, in a portable wireless device having an antenna device, a first antenna element which can be inserted and pulled out of the antenna device,
Fixed second and third antenna elements, first and second antenna elements;
And an unbalanced transmission line for feeding power to the third antenna element, and a balance-unbalance conversion means for performing a balance-unbalance conversion operation between the unbalanced transmission line and the second and third antenna elements. When the first antenna element is pushed in, the first antenna element is electrically connected to the third antenna element to form a first composite antenna, and the unbalanced transmission line is converted to the unbalanced conversion. The second antenna element and the first composite antenna are fed through the means to operate as an antenna, and when the first antenna element is pulled out, the first antenna element is electrically connected to the second antenna element. Thus, a second composite antenna is formed, and the second composite antenna and the third antenna element are fed from an unbalanced transmission line via a balanced-unbalanced conversion means to operate as an antenna.

As a result, when the second antenna element and the first composite antenna and the second composite antenna and the third antenna element are operated as antennas, respectively,
The second effect is obtained by the unbalance conversion operation of the unbalance conversion means.
To prevent leakage current from flowing from the antenna element or the first composite antenna to the ground member where the unbalanced transmission line is grounded via the unbalanced transmission line from the second composite antenna or the third antenna element. Thus, the ground member can be prevented from operating as an antenna, and the deterioration of antenna characteristics near the human body can be greatly reduced.

Further, according to the present invention, in a portable wireless device having an antenna device, a first antenna element provided in the antenna device so as to be able to be pushed and pulled out, fixed second and third antenna elements, An unbalanced transmission line for feeding power to the first, second, and third antenna elements, and a conversion operation of unbalanced transmission between the unbalanced transmission line and the first, second, and third antenna elements And a connecting means for electrically connecting any two of the first, second and third antenna elements to the balanced-unbalanced conversion circuit when the first antenna element is pushed and pulled out, respectively. When the first antenna element is pushed in, the first and second antenna elements are electrically connected to the balanced-to-unbalanced conversion circuit via connecting means, respectively. The first and second antenna elements are fed from the road via the unbalance conversion means to operate as antennas, and when the first antenna element is pulled out, the first and third antenna elements are connected via the connection means. Each was electrically connected to a balanced-to-unbalanced conversion circuit, and the first and third antenna elements were fed from the unbalanced transmission line via the balanced-to-unbalanced conversion means to operate as antennas.

As a result, when the first and second antenna elements and the first and third antenna elements are operated as antennas, respectively, the first and second antenna elements are converted into the first and second antenna elements by the converting operation of the unbalanced converter. Or a second antenna element;
This prevents leakage current from flowing from the first or third antenna element to the ground member to which the unbalanced transmission line is grounded via the unbalanced transmission line, thereby preventing the ground member from operating as an antenna. Thus, deterioration of antenna characteristics near the human body can be significantly reduced.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

(1) Principle As shown in FIG. 1, the first and second antenna elements 20 which are structurally and electrically symmetrical like a dipole antenna
2A and 2B, the first and second antenna elements 20 and 21 have the same amplitude and a phase shift of about 180 degrees from each other, as shown in FIGS. 2A and 2B. The antenna is classified as a balanced antenna because it operates when a voltage is generated and takes a balanced excitation state.

Further, as shown in FIG. 3, for example, a monopole antenna arranged almost vertically on a ground member which can be considered to be infinite and large in size than a disk having a radius of one wavelength (electric length). As described above, the structure constituted by the ground member 22 which can be regarded as having an infinite size which is structurally asymmetric and the antenna 23 which is arranged almost perpendicularly thereto,
As shown in FIGS. 4A and 4B, the vast ground member 22 has a substantially zero potential, and a voltage that changes at a predetermined cycle is generated in the antenna 23 to operate and take an unbalanced excitation state. It is classified as an unbalanced antenna.

In the unbalanced antenna according to the present invention, an image current flowing through the unbalanced antenna can be easily assumed by having the vast ground member 22, and the antenna characteristic of the unbalanced antenna can be adjusted to a balanced type. It can be selected almost the same as the antenna.

Further, as shown in FIG. 5, a rod antenna 4 (FIGS. 53A and 53B) or a helical antenna 5 shown in a conventional portable telephone 1 (FIGS. 53A and 53B).
(FIGS. 53A and 53B) and the shield case 16
First and second antenna elements 24 and 25 which are structurally and electrically asymmetric as shown in FIGS. 54 (A) and (B).
There is also an antenna composed of

Since the antenna having such a configuration is structurally and electrically asymmetric, it cannot take a balanced excitation mode or an unbalanced excitation mode as shown in FIGS. 6A and 6B, for example. In order to take an intermediate excitation form, an antenna different from a balanced antenna and an unbalanced antenna (hereinafter, referred to as
This is called an antenna in an intermediate excitation state).

FIG. 7 shows a portable telephone 26 according to the present invention.
In this mobile phone 26, the first and second antenna elements of the mobile phone 26 are structurally asymmetric, such as a rod antenna 28 and a helical antenna 29. By selecting the electric lengths of the rod antenna 28 and the helical antenna 29 to be substantially the same value, an antenna having an antenna that is electrically symmetrical and assumes a substantially balanced excitation state (hereinafter referred to as a substantially balanced antenna). A device 30 is to be provided.

In the antenna device 30, the rod antenna 28 and the helical antenna 29 are fed from the transmission / reception circuit 31 via the unbalanced transmission line 32, so that the rod antenna 28 and the helical antenna 29 are fed.
Are simultaneously operated as antennas.

Incidentally, the antenna used in the antenna device will be classified as a substantially balanced antenna hereinafter, unless otherwise specified, although it is structurally asymmetric but electrically symmetric and takes a balanced excitation state.

FIG. 7 shows the transmission / reception circuit 31 disposed outside the shield case 33 inside the housing case 27 for the sake of simplicity of explanation. It is arranged inside the case 33.

As shown in FIG. 8, when a microstrip line 34 is applied as the unbalanced transmission line 32, the microstrip line 34 is provided on one surface 35A of a dielectric layer 35 having a predetermined thickness.
Is formed, and the ground conductor 37 is formed on the other surface 35B of the dielectric layer 35, so that the strip conductor 36 is on the hot side and the ground conductor 37 is on the ground side.

In the antenna device 30, as shown in FIG. 9, basically, for example, one rod antenna 28 of a substantially balanced type antenna is connected to the transmitting / receiving circuit via the hot side 36 of the unbalanced transmission line 32. And the other helical antenna 29 is electrically connected to the transmission / reception circuit 31 via the ground side 37 of the unbalanced transmission line 32, and the shield case (via the ground side 37). (Not shown).

In this antenna device 30, however, the rod antenna 28 and the helical antenna 29 assume a balanced excitation state, whereas the unbalanced transmission line 32 assumes an unbalanced excitation state due to the grounding on the ground side 37.
The rod antenna 28
When the helical antenna 29 and the unbalanced transmission line 32 are directly electrically connected, when the rod antenna 28 and the helical antenna 29 operate as antennas, the current unbalance occurs due to the difference in the excitation state. Occurs.

As a result, in the portable telephone 26, a leakage current i2 flows from the helical antenna 29 through the ground side 37 of the unbalanced transmission line 32 to a shield case (not shown) having substantially the same potential as the ground side 37. This causes the shield case to operate as an antenna due to the leakage current i2, so that when the case 27 is covered by the user's hand or head, the antenna characteristics of the mobile phone 26 deteriorate.

Therefore, as shown in FIG. 10, in the antenna device 30 according to the present invention, the unbalanced transmission line 32
A balun (balun: balanced-t) for performing a balance-unbalance conversion operation between the rod antenna 28 and the helical antenna 29
o-unbalanced transformer) 38, and this balun 3
8, the helical antenna 29
Leakage current i to ground side 37 of unbalanced transmission line 32 from
2 prevents the shield case from operating as an antenna due to the leakage current i2.

The balun 38 is, as shown in FIG.
It has transmission lines 39 and 40 for branching one end of the hot side 36 of the unbalanced transmission line 32 into two systems, and a substantially balanced antenna such as the rod antenna 28 is electrically connected to one of the branched transmission lines 39. At the same time, the other helical antenna 29 of this nearly balanced antenna is electrically connected to the other transmission line 40 via the phase shifter 41.

Here, in the phase shifter 41, for example, FIG.
As shown in FIG. 2, two inductive reactance elements L1 and L2 are connected in series, one end of the capacitive reactance element C1 is conductively connected to a connection midpoint P1, and the other end of the capacitive reactance element C1 is shielded. It is configured by combining a plurality of T-type phase circuits 42 having a symmetric structure grounded to a case.

In the phase shifter 41, a high-frequency signal supplied from the transmitting / receiving circuit 31 via the hot side 36 of the unbalanced transmission line 32 is sent to the rod antenna 28 via one transmission line 39, and the other is transmitted to the rod antenna 28 via the transmission line 39. In the phase shifter 41 of the transmission line 40, this high-frequency signal is transmitted to the helical antenna 29 with a phase shift of about 180 degrees in the operating frequency band as a balance-unbalance conversion action.

As a result, in the balun 38, the rod antenna 28 and the helical antenna 29 are set to have the same voltage configuration as that shown in FIGS. The antenna operates as an antenna, thus maintaining the current balance between the rod antenna 28 and the helical antenna 29, and preventing the leakage current i from flowing from the helical antenna 29 to the ground side 37 of the unbalanced transmission line 32.

According to the balun 38, the phase shifter 41 is connected to the inductive reactance element L1,
As L2 and the capacitive reactance element C, for example, 1 [m
m] Since it is possible to use a chip having a fine shape of about a square, it can be formed very small as a whole.

Therefore, in the portable telephone 26 (FIG. 7) according to the present invention, the transmission / reception circuit 31
2 and the balun 38 in order to feed the rod antenna 28 and the helical antenna 29 to the rod antenna 2
8 and the helical antenna 29 are operated as substantially balanced antennas, and at this time, the leakage current i is prevented from flowing from the helical antenna 29 to the ground side 37 of the unbalanced transmission line 32 due to the balance / unbalance conversion action of the balun 38. Therefore, the shield case 33 can function only as an original ground and an electrical shielding plate without operating as an antenna.

As a result, in the portable telephone 26, the deterioration of the antenna characteristics can be reduced, and the deterioration of the communication quality can be greatly reduced. Further, in the mobile phone 26, the power absorbed by the human body, that is, SAR can be significantly reduced because the shield case 33 functions only as the original ground and the electrical shield plate.

FIG. 7 shows that the balun 38 is arranged outside the shield case 33 inside the housing case 27.
Can be arranged both inside and outside of the device.

Further, in the portable telephone 26 according to the present invention, as shown in FIG. 13, the shield case 33, the rod antenna 28 and the helical antenna 29 are partially connected to each other within the housing case 27 so as not to be capacitively coupled. The rod antenna 28
When the helical antenna 29 operates as an antenna, the shield case 33 is capacitively coupled to the rod antenna 28 and the helical antenna 29 to prevent the antenna from operating as an antenna.

In addition, in the portable telephone 26,
As shown in FIG. 14, a speaker 43, a liquid crystal display unit 44, various operation keys 45, and a microphone 46 are disposed on a front surface 27A of the housing case 27.
When the side is brought close to the user's head, the rod antenna 28 and the helical antenna 29
7 are arranged on the back 27B side.

Therefore, even when the housing case 27 is brought close to the head of the user, the rod antenna 28 and the helical antenna 29 can be kept away from the head, and thus the power radiated from the rod antenna 28 and the helical antenna 29 can be reduced. Absorption into the user's head is also greatly reduced.

Incidentally, in FIGS. 7 and 9 to 11,
Although the matching circuit is omitted to simplify the description, the matching circuit 47 can be provided, for example, between the unbalanced transmission line 32 and the balun 38, as shown in FIG.

As shown in FIG. 16, a balun 38 and
A matching circuit 48 may be provided between the rod antenna 28 and the helical antenna 29. However, if the matching circuit 48 is grounded at this time, the leakage current generated in the helical antenna 29 flows through the matching circuit 48 to the shield case 33 even if the balun 38 performs a balance-unbalance conversion operation. The case 33 operates as an antenna.

Therefore, such a matching circuit 48 is
As shown in (A) and (B), an inductive connection connected in parallel between two transmission lines 48 and 50 for electrically connecting the balanced side of the balun 38 and the rod antenna 28 and the helical antenna 29 is provided. If the matching circuit 48 is constituted by the reactance element L3 or the capacitive reactance element C2 and is not grounded, the balun 38 can be used without any problem.
, And between the rod antenna 28 and the helical antenna 29.

(2) First Embodiment (2-1) Configuration of Mobile Phone According to First Embodiment In FIG. 18, in which parts corresponding to those in FIG. 1 shows a mobile phone according to a first embodiment, and a case 2 made of a non-conductive material such as a synthetic resin.
7 is provided with an antenna device 52.

The antenna device 52 has a first antenna cover 53 formed in a cap shape with a non-conductive material and protruding from the upper end 27C of the housing case 27 on the back surface 27B side. 1 antenna cover 5
A fixed first antenna portion 54 is disposed over the inside of the case 3 and the inside of the housing case 27, and a second antenna portion 55 is provided on the upper end 53 </ b> A of the first antenna cover 53 along the longitudinal direction of the housing case 27. It is provided so as to be able to be pushed and pulled out freely along a pushing direction indicated by an arrow b substantially parallel to a direction (hereinafter, referred to as a longitudinal direction of the housing) and a drawing direction opposite thereto.

In this portable telephone 51, as shown in FIG. 19, the first and second antenna portions 54 and 55 each have an antenna element and are arranged so as not to be capacitively coupled to the shield case. I have.

FIGS. 20A and 20B show the internal structure of the mobile phone 51 except for the matching circuit and the shield case. First and second helical antennas 56 and 5 formed by spirally winding a conductive wire.
7 are provided.

In this case, the first helical antenna 56
The first helical antenna 56 is disposed inside the first antenna cover 53 with the spiral central axis (hereinafter referred to as the first central axis) substantially parallel to the longitudinal direction of the housing.

Further, the second helical antenna 57 makes the central axis of the helix of the second helical antenna 57 (hereinafter referred to as the second central axis) substantially coincide with the extension of the first central axis. Upper end 2 inside the back surface 27B of the housing case 27
It is arranged near 7C.

Then, the first and second helical antennas 5
A first or second power supply member 58 or 59 formed in a ring shape by a conductive material is electrically and mechanically connected to the opposed lower end and upper end of 6 and 57.

On the other hand, the second antenna section 55 has a rod antenna 60 made of a conductive rod-shaped wire as an antenna element, and a third feeding member 61 made of a conductive material is provided at the lower end of the rod antenna 60. A fourth power supply member 62 made of a conductive material is electrically and mechanically connected to the upper end of the rod antenna 60 electrically and mechanically. An antenna knob 63 made of a conductive material and having a T-shaped cross section is provided.

The rod antenna 60 is covered with a rod antenna cover 64 made of a non-conductive material. In the second antenna unit 55, the first and second
Are pushed or pulled out along the first and second central axes of the helical antennas 56 and 57, and at this time, the third power supply member 61 is electrically connected to one of the first and second power supply members 58 and 59. It is made to be connected to.

The transmission / reception circuit 3 is provided inside the housing case 27.
A circuit board (not shown) on which various circuit elements such as 1 and the balun 38 are mounted, and a shield case made of a conductive material that covers the circuit board are housed.

The transmission / reception circuit 31 is electrically connected to the unbalanced side of the balun 38 via the hot side of the unbalanced transmission line 32 formed of, for example, a microstrip line formed on a circuit board. On the side, first and second power supply members 58 and 59 are electrically connected.

In the actual antenna device 52,
When the second antenna unit 55 is pushed in, the antenna knob 6
When the third head 63A is pushed in the pushing direction, the first helical antenna 56 is moved from the inside of the first antenna cover 53 to the inside of the housing case 27.
, And the first and second power supply members 58 and 59 and the second helical antenna 57 can be pushed in so as to be sequentially inserted.

In the antenna device 52, when the head 63A of the antenna knob 63 abuts against the upper end 53A of the first antenna cover 53 in this manner, almost the entirety of the second antenna 55 is placed on the first antenna cover 53. From the inside of the antenna cover 53 to the inside of the housing case 27.

At this time, in the antenna device 52, by electrically connecting the fourth power supply member 62 to the second power supply member 59, the second helical antenna 57 and the rod antenna 60 are electrically connected. A composite antenna is formed from the second helical antenna 57 and the rod antenna 60.

As a result, in the antenna device 52,
In this state, when a high-frequency signal is transmitted from the transmission / reception circuit 31 to the balun 38 via the unbalanced transmission line 32, the balun 38 transmits the high-frequency signal as it is via the first power supply member 58 to the first helical antenna 56. And the phase of the high-frequency signal is shifted by about 180 degrees with respect to the first helical antenna 56 in the used frequency band, and the obtained high-frequency signal having the shifted phase is transmitted through the second feeding member 59 to the composite antenna. To send to.

Thus, in the antenna device 52, the first helical antenna 56 and the composite antenna have the same voltage configuration as that shown in FIGS. 2A and 2B, and the first helical antenna 56 and the composite The antenna is operated as a substantially balanced antenna, and at this time, a leakage current is prevented from flowing from the composite antenna to the ground side of the unbalanced transmission line 32 due to the balance / unbalance conversion operation of the balun 38.

Therefore, in this antenna device 52,
Leakage current flows from the ground side of the unbalanced transmission line 32 to the shield case, preventing the shield case from operating as an antenna and allowing the shield case to function only as an original electrical shield plate and ground. .

Thus, in the antenna device 52,
Even if the shield case is not operated as an antenna in this manner, the housing case 27 is gripped by the user's hand, or even if the housing case 27 is brought close to the user's head and the shield case is positioned near the human body. , Mobile phone 5
It is possible to greatly reduce the deterioration of the antenna characteristics in the vicinity of one human body and to suppress the power absorbed by the human body, that is, the SAR.

On the other hand, in the antenna device 52, when the second antenna portion 55 is pulled out, almost the entirety of the second antenna portion 55 is inside the first antenna cover 53 and inside the housing case 27. When the head 63A of the antenna knob 63 is pulled in the pull-out direction in a state where the second antenna 45 is retracted, the second antenna 45 is moved to the first position.
Can be pulled out from the upper end 53A of the antenna cover 53.

In the antenna device 52, when the second antenna portion 55 is pulled out from the upper end 27C of the housing case 27 as much as possible in this manner, the third power supply member 61 is provided.
Are electrically connected to the first power supply member 58 to electrically connect the first helical antenna 56 and the rod antenna 60, and a composite antenna is formed from the first helical antenna 56 and the rod antenna 60.

In the antenna device 52,
In this state, when a high-frequency signal is transmitted from the transmission / reception circuit 31 to the balun 38 via the unbalanced transmission line 32, the balun 38 directly transmits the high-frequency signal to the first power supply member 5.
8 to the composite antenna and transmit the high-frequency signal to the composite antenna in the operating frequency band.
The phase is shifted by about a degree, and the obtained high-frequency signal with the shifted phase is transmitted to the second helical antenna 57 via the second feeding member 59.

Thus, in the antenna device 52,
By causing the composite antenna and the second helical antenna 57 to have the same voltage configuration as that shown in FIGS. 2A and 2B,
The composite antenna and the second helical antenna 57 are operated as substantially balanced antennas, and at this time, the balun 38 converts the unbalanced state into an unbalanced transmission line 32 and leaks from the second helical antenna 57 to the ground side. Prevents current from flowing.

Therefore, in this antenna device 52,
Leakage current flows from the ground side of the unbalanced transmission line 32 to the shield case to prevent the shield case from operating as an antenna, thereby allowing the shield case to function only as an original electrical shield plate and ground.

In the antenna device 52,
Even when the second antenna unit 55 is pulled out, the casing case 27 is held by the user's hand or the user's head is And this shield case is located near the human body, it is possible to greatly reduce the deterioration of the antenna characteristics of the mobile phone 51 near the human body and to suppress the power absorbed by the human body, that is, the SAR. Can be.

Thus, in this portable telephone 51,
When the second antenna section 55 is pulled out, a composite antenna composed of the first helical antenna 56 and the rod antenna 60 and the second helical antenna 57 are used to transmit a high-frequency signal from the transmission / reception circuit 31 in unbalanced transmission. The composite antenna and the second helical antenna 57 are sequentially transmitted through the line 32 and the balun 38, and the transmission signal is transmitted to a base station (not shown) via the composite antenna and the second helical antenna 57. And a high-frequency signal transmitted from the base station and received by the composite antenna and the second helical antenna 57 to the transmission / reception circuit 31 via the balun 38 and the unbalanced transmission line 32 in order.

In the portable telephone 51, when the second antenna section 55 is pushed, the second antenna section 55 is pushed over the inside of the first antenna cover 53 and the housing case 27, and the portability is impaired. As a result, a composite antenna composed of the first helical antenna 56, the second helical antenna 57 and the rod antenna 60 is used.

In this portable telephone 51, at this time, the transmission signal is transmitted from the transmission / reception circuit 31 to the unbalanced transmission line 3.
2 and the balun 38 in order to transmit to the first helical antenna 56 and the composite antenna, transmit the transmission signal to the base station via the first helical antenna 56 and the composite antenna, and transmit the transmission signal from the base station. Lever first
The helical antenna 56 and the composite antenna transmit the received signal to the transmission / reception circuit 31 via the balun 38 and the unbalanced transmission line 32 sequentially.

Here, in the portable telephone 51, when the physical lengths of the first and second helical antennas 56 and 57 and the rod antenna 60 are compared, the rod antenna 60 has the first and second helical antennas. 56 and 57
A physically wider frequency band than that of the first and second helical antennas 56 and 57 can be secured.

In this portable telephone 51, a relatively wide frequency band can always be ensured by operating the rod antenna 60 as an antenna both when pushing and pulling out the second antenna unit 55.

(2-2) Operation and Effect of First Embodiment In the above configuration, in the portable telephone 51, the first antenna cover 53 is provided on the upper end 27C of the housing case 27, and the first antenna cover 53 is provided. A first antenna section 54 having first and second helical antennas 56 and 57 is arranged inside the antenna cover 53 and inside the housing case 27, and an upper end 53A of the first antenna cover 53 is provided. A second antenna section 55 having a rod antenna 60 is provided so as to be able to be pushed and pulled out.

When the second antenna unit 55 is pushed in, the first helical antenna 56 and the second helical antenna 56 are sequentially transmitted from the transmission / reception circuit 31 via the unbalanced transmission line 32 and the balun 38.
To the composite antenna composed of the helical antenna 57 and the rod antenna 60 to operate the first helical antenna 56 and the composite antenna as substantially balanced antennas. Unbalanced transmission line 3 from this composite antenna
2 prevents leakage current from flowing to the ground side.

When the second antenna unit 55 is pulled out, the composite antenna composed of the first helical antenna 56 and the rod antenna 60 from the transmitting / receiving circuit 31 via the unbalanced transmission line 32 and the balun 38 in order, and the second helical antenna Power to the antenna 57 and the second antenna
Of the helical antenna 57 is operated as a substantially balanced antenna, and at this time, the leakage current flows from the second helical antenna 57 to the ground side of the unbalanced transmission line 32 due to the balance / unbalance conversion action of the balun 38. To prevent.

Therefore, in the portable telephone 51, it is possible to prevent the leakage current from flowing from the ground side of the unbalanced transmission line 32 into the shield case and to operate as an antenna. Thus, the antenna characteristics of the portable telephone 51 near the human body can be prevented. Degradation can be greatly reduced.

Further, in this portable telephone 51, since the shield case is not operated as an antenna as described above, the power absorbed by the human body can be suppressed and the SAR can be greatly reduced.

Further, in this portable telephone 51, since the rod antenna 60 operates as an antenna both when the second antenna section 55 is pushed and pulled out, a relatively wide frequency band is always secured by the rod antenna 60. Can be.

According to the above configuration, the second antenna unit 5
5, the transmission / reception circuit 31 outputs the unbalanced transmission line 32
And first helical antenna 5 via balun 38
6 and the composite antenna composed of the second helical antenna 57 and the rod antenna 60 to operate the first helical antenna 56 and the composite antenna as substantially balanced antennas. The conversion of the balance prevents leakage current from flowing from the composite antenna to the ground side of the unbalanced transmission line 32. When the second antenna unit 55 is pulled out, the unbalanced transmission line 32 and the balun 38 are transmitted from the transmission / reception circuit 31. A first helical antenna 56 and a rod antenna 60
And a second helical antenna 57
To operate the composite antenna and the second helical antenna 57 as substantially balanced antennas. At this time, the unbalanced transmission line 32 By preventing the leakage current from flowing to the ground side of the antenna, the shield case can be prevented from operating as an antenna, and the deterioration of antenna characteristics near the human body can be greatly reduced. It is possible to realize a mobile phone capable of greatly reducing the deterioration.

(3) Second Embodiment (3-1) Configuration of Cellular Phone According to Second Embodiment FIG. 21 in which parts corresponding to those in FIG.
FIG. 18 shows a mobile phone 65 according to the second embodiment, which is configured similarly to the mobile phone 51 (FIG. 18) according to the above-described first embodiment except for the configuration of the antenna device 66.

The antenna device 66 has first and second cap-shaped antenna covers 67 and 68 sequentially laminated on the rear surface 27B side of the upper end 27A of the housing case 27. The second helical antenna 57 is arranged inside the cover 67, and
The first helical antenna 56 is disposed inside the antenna cover 68.

In the antenna device 66, the second antenna portion 55 is provided at the upper end 68A of the second antenna cover 68 so as to be able to be pushed and pulled out in the pushing direction and the drawing direction.

Therefore, in the portable telephone 65, the second
The antenna section 55 of the second and first antenna covers 68
And 67 are sequentially pushed into the housing case 27 so that the portion into which the second antenna unit 55 is pushed inside the housing case 27 is the mobile phone according to the above-described first embodiment. 51 can be shortened.

In addition, in this portable telephone 65, the first antenna section 54 is connected to the upper end 27 of the housing case 27.
By arranging the first and second antenna portions 54 and 55 outside the user's hand holding the housing case 27 or away from the head of the user to which the housing case 27 can be approached, by arranging them outside the C. Thus, the antenna characteristics of the mobile phone 65 near the human body can be further reduced.

In the portable telephone 65, the amount of power radiated from the first and second antennas 54 and 55 to the human body can also be reduced.

In this portable telephone 51, as shown in FIG. 22, the first and second antenna portions 54 and 55 are arranged so as not to be capacitively coupled to the shield case, and the shield case operates as an antenna. To prevent them from doing so.

In FIGS. 23A and 23B in which parts corresponding to those in FIGS. 20A and 20B are assigned the same reference numerals, in the first antenna section 54, the first helical The antenna 56 is disposed inside the second antenna cover 68 with the first central axis substantially coincident with the extension of the second central axis, and the first power supply member 58 is connected to the first antenna cover 67. It is fitted in a hole formed in the upper end 67A.

In the first antenna section 54, the second helical antenna 57 has the second central axis substantially parallel to the longitudinal direction of the housing and the second antenna 55 together with the second feeding member 59 inside the first antenna cover 67. Are located in

Further, a balun 38 is provided inside the first antenna cover 67, and the balanced side of the balun 38 is electrically connected to the first and second feeding members 58 and 59.

In this antenna device 66,
When the second antenna unit 55 is pushed in, the antenna knob 6
3 head 63A at the upper end 68 of the second antenna cover 68.
The second antenna portion 55 is pushed from the inside of the second antenna cover 68 to the inside of the housing case 27 so as to abut against the first antenna cover A, and the fourth power supply member 62 is inserted inside the first antenna cover 67. Is electrically connected to the second power supply member 59.

Thus, in the antenna device 66,
The rod antenna 60 can be pushed from the inside of the first antenna cover 67 to the inside of the housing case 27, and the portion of the rod antenna 60 pushed into the housing case 27 can be shortened.

In the antenna device 66, when the second antenna portion 55 is pulled out, almost the entire rod antenna 60 is pulled out from the upper end 67A of the first antenna cover 67. Inside, the third power supply member 61 is electrically connected to the first power supply member 58.

As a result, in the antenna device 66,
The second antenna section 55 can be located away from the upper end 27C of the housing case 27.

Therefore, in the portable telephone 65, when the second antenna unit 55 is pushed, the portable telephone 51 according to the first embodiment described above (FIGS. 20A and 20B).
The rod antenna 60 can be further moved away from the hand of the user holding the housing case 27 and the head of the user to which the housing case 27 can be approached.

In the portable telephone 65, the second
When the antenna unit 55 is pulled out, the rod antenna 60
Of the user holding the housing case 27 compared to the mobile phone 51 according to the first embodiment,
7 can be largely moved away from the head of the user to be brought close.

As a result, in this portable telephone 65, deterioration of antenna characteristics near the human body can be further reduced as compared with the first embodiment, and
The power absorbed by the human body, that is, SAR, can be further reduced.

In addition to this, in this portable telephone 65, it is difficult to dispose the first antenna unit 54 due to the space occupied by the battery or the like inside the housing case 27, or the second antenna unit 55 Even when it is difficult to push in, the first and second antenna portions 54 and 55 can be easily provided.

In this portable telephone 65, although the first and second antenna covers 67 and 68 are provided, the balun 38 can be formed as a fine chip as described above. A first antenna cover 67 having substantially the same size as the second antenna cover 6 can be used.
Since only the first helical antenna 56 is disposed inside the mobile phone 65, the mobile phone 65 can be substantially the same size as the first helical antenna 56. It is possible to prevent an increase in size.

(3-2) Operation and Effect of Second Embodiment In the above configuration, in the portable telephone 65, the first and second antenna covers 67 and 68 are sequentially provided on the upper end 27C of the housing case 27. The first antenna section 54 is arranged over the inside of the first and second antenna covers 67 and 68 while the second antenna section 55 is pushed into the upper end 68A of the second antenna cover 68. And can be freely pulled out.

In the portable telephone 65, when the second antenna section 55 is pushed in, the second antenna section 55 is pushed from inside the second antenna cover 68 to inside the housing case 27, and When the second antenna section 55 is pulled out, the second antenna section 55 is completely pulled out from the inside of the housing case 27.

Therefore, in the portable telephone 65, when the second antenna section 55 is pushed in and pulled out, the portion of the second antenna section 55 that is pushed into the housing case 27 can be shortened. The second antenna unit 55 can be moved away from the hand of the user holding the 27 or the head of the user to which the housing case 27 is brought close.

Further, in this portable telephone 65, since the first antenna portion 54 is arranged outside the housing case 27, the hand of the user holding the housing case 27 or the user to whom the housing case 27 can be approached. The first antenna section 54 can be kept away from the head of the first antenna section.

Therefore, in the portable telephone 65, the deterioration of the antenna characteristics near the human body can be further reduced, and the power absorbed by the human body from the first and second antenna units 54 and 55, that is, the SAR is also reduced. be able to.

According to the above configuration, the first and second antenna covers 67 and 68 are provided on the upper end 27C of the housing case 27.
Are sequentially stacked, the first antenna unit 54 is arranged inside the first and second antenna covers 67 and 68, and the second antenna unit 55 is connected to the upper end 68A of the second antenna cover 68. In addition to the effects obtained by the above-described first embodiment, the first and second antenna units 54 and 55 can be removed from the human body when the mobile phone 65 is used. It is possible to further reduce the deterioration of the antenna characteristics in the vicinity of the human body at a distance.

(4) Third Embodiment (4-1) Configuration of Mobile Phone According to Third Embodiment FIG. 20 (A) and FIG. 20 (B) are denoted by the same reference numerals. 24A and 24B show a mobile phone 69 according to the third embodiment, and the mobile phone 51 according to the first embodiment described above except for the configuration of the second antenna unit 71 of the antenna device 70. (FIGS. 20A and 20B).

In the first antenna section 71, as shown in FIGS. 25A and 25B, a third feeding member is provided at the lower end of a first antenna half 72 made of a conductive tubular member. 61 are electrically and mechanically connected, and the first
At the upper end of the antenna half 72, a pull-out stopper 73 is provided, and a second antenna half 74 made of a conductive rod-like member can be pushed into and pulled out of the hole of the first antenna half 72 freely. It is inserted and provided.

A sliding spring 75 made of a conductive material is electrically and mechanically connected to the lower end of the second antenna half 74 located in the hole of the first antenna half 72. A fourth power supply member 62 is electrically and mechanically connected to the upper end of the second antenna half 74, and the fourth power supply member 62 is provided with an antenna knob 63.

Further, the first and second antenna halves 7
2 and 74 have antenna covers 76 and 77, respectively.
Is coated.

Thus, in the second antenna section 71, when the second antenna half 74 is pushed or pulled out of the first antenna half 72,
The sliding spring 75 slides in the hole of the antenna half 72 of the first antenna half 72 and the second antenna half 74.
Are electrically connected to each other via the sliding spring 75 to form a telescopic rod antenna.

In the actual antenna device 70,
When the second antenna 71 is pushed in, the antenna knob 6
When the third head 63A is pushed in the pushing direction, the second antenna portion 71 is pushed from the inside of the first antenna cover 53 while pushing the second antenna half 74 into the first antenna half 72. It is pushed into the inside of the body case 27.

In the antenna device 70, when the head 63A of the antenna knob 63 abuts against the upper end 53A of the first antenna cover 53, the first antenna half 72 is brought into contact with the second antenna half 74. By forming a shortened rod antenna by pushing the whole, and electrically connecting the fourth feeding member 62 to the second feeding member 59, the shortened rod antenna and the second helical antenna 57 are electrically connected. To form a composite antenna.

Thus, in the antenna device 70,
By forming a shortened rod antenna by the second antenna unit 71, the part of the rod antenna pushed into the housing case 27 is replaced by the mobile phone 51 according to the first embodiment (FIG. 20A). (B) and (B)).

Therefore, in the portable telephone 69, when the second antenna portion 71 is pushed in, the shortened rod antenna is held by the user's hand holding the housing case 27,
This housing case 27 can be largely separated from the user's head to be brought close, and thus the first antenna unit 7
In the state where 1 is pushed in, the deterioration of the antenna characteristics near the human body can be further reduced. Also, at this time, the amount of power radiated from the rod antenna to the human body can be further reduced.

In the antenna device 70, the second
When the head 63A of the antenna knob 63 is pulled in the pull-out direction when the antenna unit 71 is pulled out, the second antenna unit 71 is pulled out while pulling out the second antenna half 74 from the first antenna half 72. 1 antenna cover 53
From the upper end 53A.

In the antenna device 70,
When the second antenna half 74 is fully pulled out from the first antenna half 72, a rod antenna extended by the first and second antenna halves 72 and 74 is formed, and the third feeding member 61 is formed. Is electrically connected to the first power supply member 58 to electrically connect the extended rod antenna and the first helical antenna 56 to form a composite antenna.

Thus, in the portable telephone 69, a relatively wide frequency band can be secured by using the rod antenna both when pushing and pulling out the second antenna unit 71.

(4-2) Operation and Effect of Third Embodiment In the above configuration, in the portable telephone 69, the first antenna cover 53 extends over the inside of the first antenna cover 53 and the inside of the housing case 27. The antenna unit 54 is arranged, and a second antenna unit 71 forming a telescopic rod antenna is provided on the upper end 53A of the first antenna cover 53 so as to be able to be pushed and pulled out.

In this portable telephone 69, when the second antenna 71 is pushed in, the second antenna 74 is attached to the first antenna 72 by the second antenna 71.
The second antenna portion 71 is pushed from inside the first antenna cover 53 to inside the housing case 27 while forming a shortened rod antenna.

Therefore, in this portable telephone 69, when the second antenna portion 71 is pushed in, a portion of the rod antenna shortened in the second antenna portion 71 is pushed into the case 27 of the rod antenna. Can be significantly shortened. Thus, the rod antenna is largely separated from the hand of the user holding the housing case 27 or the user's head to which the housing case 27 is brought close, and the antenna characteristics in the vicinity of the human body are greatly reduced. Can be further reduced.

According to the above configuration, the first antenna portion 54 is arranged over the inside of the first antenna cover 53 and the inside of the housing case 27, and the upper end 53A of the first antenna cover 53 is A second antenna section 71 forming a telescopic rod antenna is provided so as to be able to be pushed and pulled out, and a telescopic rod antenna is formed in the second antenna section 71 when the second antenna section 71 is pushed. Accordingly, in addition to the effects obtained by the above-described first embodiment, the second antenna unit 71
The rod antenna can be largely separated from the hand of the user holding the housing case 27 or the head of the user to which the housing case 27 can be approached, thus further reducing the deterioration of the antenna characteristics near the human body. Can be.

(5) Fourth Embodiment (5-1) Configuration of Cellular Phone According to Fourth Embodiment FIG. 20 (A) and FIG. 20 (B) are denoted by the same reference numerals. 26A and 26B show a mobile phone 79 according to the fourth embodiment, and the mobile phone 51 according to the first embodiment described above except for the configuration of the antenna device 80.
(FIGS. 20A and 20B).

In this antenna device 80, the first case provided on the back surface 27B side of the upper end 27C of the housing case 27.
Antenna cover 81, and the first fixed antenna cover 81 extends over the inside of the first antenna cover 81 and the housing case 27.
Of the first antenna cover 81, and a second antenna portion 83 is provided so as to be able to be pushed and pulled out.

In the first antenna section 82, the first helical antenna 56 is disposed inside the first antenna cover 81 with the first central axis substantially parallel to the longitudinal direction of the housing. The second helical antenna 57 is arranged near the upper end 27C inside the back surface 27B of the housing case 27 with the second central axis substantially coincident with the extension of the first central axis.

Then, the first and second helical antennas 5
A fifth or sixth power supply member 84 or 85 formed in a ring shape with a conductive material is electrically and mechanically connected to the upper end or the lower end of each of 6 and 57. .

On the other hand, in the second antenna section 83, first and second short-circuit members 86 and 87 made of a conductive material are electrically connected to the rod antenna 60 at predetermined portions along the longitudinal direction of the rod antenna 60. The rod antenna 60 is provided with a rod-shaped antenna cover 88 made of a non-conductive material so as to expose the peripheral side surfaces of the first and second short-circuit members 86 and 87. I have.

The second antenna section 83 is pushed or pulled out along the first and second central axes of the first and second helical antennas 56 and 57.

As a result, in the antenna device 80,
When the second antenna 83 is pushed in, the antenna knob 6
When the third head 63A is pushed in the pushing direction, the second antenna 83 is pushed into the inside of the first antenna cover 81 and the inside of the housing case 27, and the head 63A of the antenna knob 63 is pushed. When the second antenna portion 83 is applied to the upper end 81A of the first antenna cover 81, almost the entirety of the second antenna portion 83 is housed inside the first antenna cover 81 and inside the housing case 27.

At this time, in the antenna device 80, the fourth feeding member 62 is electrically connected to the second feeding member 59, and the first short-circuiting member 86 is electrically connected to the sixth feeding member 85. And the upper and lower ends of the second helical antenna 57 are short-circuited to the rod antenna 60 to form a composite antenna.

Here, in the antenna device 80, when the first helical antenna 56 is fed from the transmission / reception circuit 31 via the unbalanced transmission line 32 and the balun 38 sequentially,
The first helical antenna 56 is operated as an antenna.

In addition, in the antenna device 80, the composite antenna is also fed from the transmission / reception circuit 31 via the unbalanced transmission line 32 and the balun 38 in sequence, and the electrical length of the second helical antenna 57 in the composite antenna is changed. Is apparently changed by a short circuit to the rod antenna 60, and the resonance point of the second helical antenna 57 with respect to the operating frequency is shifted.
Only the rod antenna 60 operates as an antenna without operating the antenna 7 as an antenna.

At this time, the antenna device 80 prevents the leakage current from flowing from the rod antenna 60 constituting the composite antenna to the ground side of the unbalanced transmission line 32 due to the balance / unbalance conversion operation of the balun 38. This prevents a leakage current from flowing from the ground side of the unbalanced transmission line 32 to the shield case and prevents the shield case from operating as an antenna.

On the other hand, in the antenna device 80, when the head 63A of the antenna knob 63 is pulled in the pulling-out direction when the second antenna 83 is pulled out, the second antenna 83 is moved to the casing case. 27 can be drawn outside through the inside of the first antenna cover 81.

In the antenna device 80,
The upper end 27C of the second antenna part 83 housing case 27
When the third power supply member 61 is pulled out from the
The lower and upper ends of the first helical antenna 56 are short-circuited to the rod antenna 60 by electrically connecting the first helical antenna 56 to the rod antenna 60 by electrically connecting the second short-circuit member 87 to the fifth power supply member 84. To form a composite antenna.

As a result, in the antenna device 80,
Unbalanced transmission line 32 and balun 38 from transmission / reception circuit 31
, The electrical length of the first helical antenna 56 is apparently changed by a short circuit to the rod antenna 60, and the resonance point for the operating frequency of the first helical antenna 56 is changed. Therefore, only the rod antenna 60 is operated as an antenna without operating the first helical antenna 56 as an antenna.

In addition, in the antenna device 80, the second helical antenna 57 is also fed from the transmission / reception circuit 31 via the unbalanced transmission line 32 and the balun 38 in order, so that the second helical antenna 57 To work as

Therefore, in this portable telephone 79, the leakage current does not flow from the second helical antenna 57 to the ground side of the unbalanced transmission line 32 due to the balance / unbalance conversion action of the balun 38, and the unbalanced state occurs. It also prevents the leakage current from flowing from the ground side of the transmission line 32 to the shield case and the shield case from operating as an antenna.

Thus, in this portable telephone 79, a relatively wide frequency band can always be ensured by operating the rod antenna 60 as an antenna both when pushing and pulling out the second antenna unit 83. .

(5-2) Operation and Effect of Fourth Embodiment In the above configuration, when the second antenna 83 is pushed in, the second helical antenna 5
7 is short-circuited to the rod antenna 60 to form a composite antenna, and the composite antenna and the first helical antenna 56 are fed from the transmission / reception circuit 31 via the unbalanced transmission line 32 and the balun 38 sequentially. The rod antenna 60 and the first helical antenna 56 are operated as substantially balanced antennas.
8 prevents the leakage current from flowing from the rod antenna 60 to the ground side of the unbalanced transmission line 32 due to the balance / unbalance conversion operation.

In the portable telephone 79, when the second antenna unit 83 is pulled out, the first helical antenna 56 is short-circuited to the rod antenna 60 to form a composite antenna. The rod antenna 60 and the second helical antenna 57 are operated as substantially balanced antennas by feeding power to the composite antenna and the second helical antenna 57 via the balun 38 sequentially.
Prevents the leakage current from flowing from the second helical antenna 57 to the ground side of the unbalanced transmission line 32.

Therefore, in the mobile phone 79, similarly to the first embodiment, the shield case can be prevented from operating as an antenna, and the deterioration of the antenna characteristics near the human body can be reduced.

In the portable telephone 79, the rod antenna 60 operates as an antenna both when the second antenna section 83 is pushed and pulled out, so that a relatively wide frequency band can be secured by the rod antenna 60. .

According to the above configuration, the second antenna unit 8
3, the second helical antenna 57 is short-circuited to the rod antenna 60 to form a composite antenna, and the first helical antenna 56 is sequentially transmitted from the transmission / reception circuit 31 via the unbalanced transmission line 32 and the balun 38. The first helical antenna 56 and the rod antenna 60 are operated as substantially balanced antennas by feeding power to the composite antenna, and at this time, the unbalanced transmission from the rod antenna 60 is performed by the balance / unbalance conversion operation of the balun 38. Track 32
To prevent a leakage current from flowing to the ground side of the antenna, and when extracting the second antenna unit 83, short-circuit the first helical antenna 56 to the rod antenna 60 to form a composite antenna, and unbalance the transmission / reception circuit 31 from the transmission / reception circuit 31. The composite antenna and the second helical antenna 57 are fed through the transmission line 32 and the balun 38 sequentially to supply the power to the rod antenna 6.
0 and the second helical antenna 57 are operated as substantially balanced antennas. At this time, the balun 38 converts the unbalanced state into an unbalanced transmission line 32 and leaks from the second helical antenna 57 to the ground side. By preventing the current from flowing, it is possible to prevent the shield case from operating as an antenna and reduce deterioration of antenna characteristics near the human body as in the first embodiment, Thus, it is possible to realize a mobile phone capable of greatly reducing the deterioration of the call quality.

(6) Fifth Embodiment (6-1) Configuration of Mobile Phone According to Fifth Embodiment FIG. 26 (A) and FIG. 26 (B) are denoted by the same reference numerals. 27A and 27B show a mobile phone 89 according to the fifth embodiment, and the mobile phone 79 according to the fourth embodiment described above except for the configuration of the antenna device 90.
(FIGS. 26A and 26B).

The antenna device 90 has first and second cap-shaped antenna covers 91 and 92 which are sequentially laminated on the rear surface 27B of the upper end 27C of the housing case 27. The first inside 91
The second helical antenna 57 of the antenna section 82 of the second
Is arranged together with the second power supply member 59 with the central axis of the second antenna being substantially parallel to the longitudinal direction of the housing, and the first helical antenna 56 is provided inside the second antenna cover 92 with the first central axis of It is arranged substantially in line with the extension of the central axis.

The upper end 92 of the second antenna cover 92
A is provided with a hole, and a fifth power supply member 8 is provided in the hole.
4 is fitted, and a hole is also formed in the upper end 91A of the first antenna cover 91, and the first power supply member 58 is fitted in the hole.

Further, a hole is also formed in the upper end 27C of the housing case 27 on the back surface 27B side, and a sixth power supply member 85 is fitted in this hole.

The balun 38 is provided inside the first antenna cover 91, and the first and second power supply members 58 and 59 are electrically connected to the balanced side of the balun 38.

On the other hand, the second antenna portion 83 is provided at the upper end 92A of the second antenna cover 92 so as to be able to be pushed and pulled out, and the first and second helical antennas 56 and 57 can be pushed and pulled out at the time of pushing and pulling out. Along the central axis of the second, the fifth feeding member 84, the first helical antenna 56,
The first power supply member 58, the second power supply member 59, the second helical antenna 57, and the sixth power supply member 85 are inserted.

In the antenna device 90, the second
When the antenna unit 83 is pushed in, the head 63A of the antenna knob 63 is brought into contact with the upper end 92A of the second antenna cover 92 so that the second antenna unit 83 is in the second position.
From the inside of the antenna cover 92 to the inside of the housing case 27, electrically connecting the fourth power supply member 62 to the second power supply member 59 inside the first antenna cover 91, and By electrically connecting the short-circuit member 86 to the sixth power supply member 85, the upper and lower ends of the second helical antenna 57 are short-circuited to the rod antenna 60 to form a composite antenna.

As a result, in the antenna device 90, the second antenna section 83 is connected to the second antenna cover 92.
The portion of the second antenna 83 that is pushed into the housing case 27 can be shortened by the amount of pushing into the housing case 27 from the inside of the first antenna cover 91 through the inside of the first antenna cover 91.

In the antenna device 90, when the second antenna portion 83 is pulled out, almost the entirety of the second antenna portion 83 is connected to the upper end 91 of the first antenna cover 91.
A to pull out the first antenna cover 9
1, the third power supply member 61 is electrically connected to the first power supply member 58, and the second short-circuiting member 87 is electrically connected to the fifth power supply member 84.
The upper and lower ends of the helical antenna 56 are short-circuited to the rod antenna 60 to form a composite antenna.

Thus, in this antenna device 90, at this time, the second antenna portion 90 can be located away from the upper end 27C of the housing case 27.

Therefore, in this mobile phone 89, when the second antenna 83 is pushed in, the mobile phone 79 according to the above-described fourth embodiment (FIGS. 26A and 26B).
The rod antenna 60 of the second antenna unit 83 can be kept away from the hand of the user holding the housing case 27 or the head of the user to which the housing case 27 can be approached.

In this portable telephone 89, the second
When the antenna unit 83 is pulled out, the rod antenna 60 is positioned away from the upper end 27C of the housing case 27, so that the hand of the user gripping the housing case 27 or the user to whom the housing case 27 can be approached. This rod antenna 60 can be kept far away from the head.

Thus, in mobile phone 89, deterioration of antenna characteristics near a human body can be further reduced as compared with mobile phone 79 according to the fourth embodiment.

In addition to this, in this portable telephone 89, the case where it is difficult to dispose the first antenna unit 82 due to the space occupied by the battery or the like inside the housing case 27, or the case where the second antenna unit 83 The first and second antenna portions 82 and 83 can be easily provided even when it is difficult to push them into the antenna.

In this portable telephone 89, although the first and second antenna covers 91 and 92 are provided on the housing case 27, a fine chip is used for the inductive reactance element and the capacitive reactance element constituting the balun 38. Since the balun 38 itself can be formed small as a whole, the first antenna cover 91 having substantially the same size as the second helical antenna 57 can be used.

Also, since only the first helical antenna 56 is disposed inside the second antenna cover 92,
The first helical antenna 56 can be almost the same size as the first helical antenna 56, so that the mobile phone 89 can be prevented from being significantly increased in size along the longitudinal direction of the housing.

(6-2) Operation and Effect of Fifth Embodiment In the above configuration, in the portable telephone 89, the second and second antenna covers 91 and 92 are sequentially provided on the upper end 27C of the housing case 27. The first antenna unit 8 is stacked and disposed inside the second and second antenna covers 91 and 92.
2, and the second antenna portion 83 is provided at the upper end 92A of the second antenna cover 92 so as to be able to be pushed and pulled out.

In the portable telephone 89, when the second antenna 83 is pushed in, the second antenna 83 is moved from the upper end 92A of the second antenna cover 92 via the first antenna cover 91 to the casing case. When the second antenna section 83 is pushed into the second antenna section 83 and the second antenna section 83 is pulled out, the second antenna section 83 is completely pulled out from the inside of the housing case 27.

Therefore, in this portable telephone 89, when pushing and pulling out the second antenna 83, the first and second antennas 82 and 72 are held by the user's hand holding the case 27, The body case 27 can be far away from the user's head to which the body case 27 can be approached, and thus the deterioration of antenna characteristics near the human body can be further reduced.

According to the above configuration, the first antenna section 82 is arranged inside the second and second antenna covers 91 and 92 stacked on the upper end 27C of the housing case 27, and By providing the second antenna section 83 at the upper end 92A of the antenna cover 92 so as to be able to be pushed and pulled out freely, in addition to the effects obtained by the above-described fourth embodiment, the second antenna section 83 has The first and second antenna portions 82 and 83 are far away from the human body, so that the deterioration of the antenna characteristics near the human body can be further reduced.

(7) Sixth Embodiment (7-1) Configuration of Mobile Phone According to Sixth Embodiment FIG. 20 (A) and FIG. 20 (B) are denoted by the same reference numerals. 28A and 28B show a mobile phone 93 according to the sixth embodiment, and the mobile phone 51 according to the first embodiment described above except for the configuration of the antenna device 94.
(FIGS. 20A and 20B).

In the antenna device 94, the first case 27 is provided on the rear surface 27B side of the upper end 27C of the housing case 27.
The first antenna section 96 is disposed over the inside of the first antenna cover 95 and the inside of the housing case 27, and the upper end 95A of the first antenna cover 95 A second antenna unit 97 is provided so as to be able to be pushed and pulled out.

In this first antenna section 96, first and second helical antennas 98 are used as antenna elements.
And 99, the first helical antenna 98 is disposed inside the first antenna cover 95 with the first central axis substantially parallel to the longitudinal direction of the housing, and the second helical antenna 99 is The second central axis is arranged inside the housing case 27 so as to substantially coincide with the extension of the first central axis.

The first and second helical antennas 98
And 99 between the first and second power supply members 58 and 59 provided at the opposed lower end and upper end of the seventh and eighth power supply members 100 and 1 formed of a conductive material in a ring shape.
01 are separated from each other so as not to be capacitively coupled to each other, and are also provided to the first and second power supply members 58 and 59 so as not to be capacitively coupled to each other.

On the other hand, in the second antenna section 97, a first feed terminal 103 made of a conductive material is electrically and mechanically connected to the lower end of the rod antenna 102.
Of the first connection portion 10 made of a non-conductive material
4 are mechanically connected. This first connection portion 104
, A first antenna member 105 made of a rod-shaped conductive material is electrically and mechanically connected, whereby the first antenna member 105 and the first power supply terminal 103 are electrically separated from each other. I have.

A second power supply terminal 106 made of a conductive material is electrically and mechanically connected to the upper end of the rod antenna 102, and a second power supply terminal 106 made of a non-conductive material is connected to the second power supply terminal 106. Are mechanically connected.

A second antenna member 108 made of a rod-shaped conductive material is electrically and mechanically connected to the second connection portion 107, and the second antenna member 108 is made of a non-conductive material. An antenna knob 63 having a T-shaped cross section is provided. Thereby, the second antenna member 108
And the second power supply terminal 106 are electrically separated.

Further, the rod antenna 102 is covered with a rod antenna cover 109 made of a non-conductive material.

In the antenna device 94, the balanced side of the balun 38 is connected to the seventh and eighth feed members 100 and 10.
1 electrically.

In the antenna device 94,
When the second antenna unit 97 is pushed in, the antenna knob 6
The third head 63A is connected to the upper end 95 of the first antenna cover 95.
When the second antenna unit 97 is pushed in such a manner as to abut against A, the second antenna unit 97 is housed from the inside of the first antenna cover 95 to the inside of the housing case 27, and While electrically connecting the antenna member 108 to the first and seventh power supply members 58 and 100,
Is electrically connected to the eighth power supply member 101.

As a result, in the antenna device 94, the second antenna member 108 and the first helical antenna 98 are electrically connected to form a composite antenna. 32
When the composite antenna and the rod antenna 102 are supplied with power via the balun 38 and the balun 38 sequentially, the composite antenna and the rod antenna 102 are operated as a substantially balanced antenna.

In addition, in this antenna device 94, at this time, a leakage current from the rod antenna 102 to the ground side of the unbalanced transmission line 32 is prevented by the balance / unbalance conversion action of the balun 38, and the shield This prevents the case from operating as an antenna due to this leakage current.

On the other hand, in the antenna device 94, when the second antenna portion 97 is pulled out, the second antenna portion 97 is pulled out from the inside of the housing case 27 through the inside of the first antenna cover 95. Then, the seventh power supply member 100 is electrically connected to the first power supply terminal 103, and the first antenna member 105 is electrically connected to the second and eighth power supply members 59 and 101.

As a result, in the antenna device 94,
The first antenna member 105 and the second helical antenna 99 are electrically connected to form a second composite antenna. In this state, the transmitting and receiving circuit 31 sequentially passes through the unbalanced transmission line 32 and the balun 38 in this state. Rod antenna 10
When power is supplied to the antenna 2 and the composite antenna, the rod antenna 102 and the composite antenna are operated as a substantially balanced antenna.

In addition, in this antenna device 94, at this time, the unbalanced transmission line 32 is converted from the composite antenna composed of the first antenna member 105 and the second helical antenna 99 by the balance / unbalance conversion action of the balun 38. To prevent the leakage current from flowing to the ground side of the antenna and prevent the shield case from operating as an antenna due to the leakage current.

Therefore, in this portable telephone 93, the second antenna unit 97 is provided in the same manner as in the first embodiment.
When the shield case is not operated as an antenna at the time of pushing in and pulling out, the housing case 27 is gripped by the user's hand, or the housing case 27 is brought close to the user's head, and this shield case is placed near the human body. Even if it is located, deterioration of the antenna characteristics near the human body of the mobile phone 93 can be greatly reduced.

In this portable telephone 93, a relatively wide frequency band can always be ensured by operating rod antenna 102 as an antenna both when pushing and pulling out second antenna unit 97. .

(7-2) Operation and Effect of Sixth Embodiment In the above configuration, in the portable telephone 93, the first and second antenna portions 97 are provided on the lower and upper ends of the rod antenna 102, respectively. 2 antenna members 105 and 1
08 is provided.

In the portable telephone 93, when the second antenna unit 97 is pushed, the composite antenna composed of the first helical antenna 98 and the second antenna member 108 and the rod antenna 102 are mounted on the balanced side of the balun 38. The composite antenna and the rod antenna 102 are electrically connected, and the composite antenna and the rod antenna 102 are fed from the transmission / reception circuit 31 via the unbalanced transmission line 32 and the balun 38 sequentially so that the composite antenna and the rod antenna 102 operate as a substantially balanced antenna. At this time, the balun 38 prevents the leakage current from flowing from the rod antenna 102 to the ground side of the unbalanced transmission line 32 due to the balance / unbalance conversion operation.

In the portable telephone 93, when the second antenna unit 97 is pulled out, the rod antenna 102, the second helical antenna 99 and the first
Is electrically connected to the composite antenna composed of the antenna member 105, and the rod antenna 102 and the composite antenna are fed from the transmission / reception circuit 31 via the unbalanced transmission line 32 and the balun 38 in order. Is operated as a substantially balanced antenna, and at this time, a leakage current is prevented from flowing from the composite antenna to the ground side of the unbalanced transmission line 32 due to the balance / unbalance conversion operation of the balun 38.

Therefore, in this portable telephone 93, the casing case 2 is not used since the shield case is not operated as an antenna.
7 is held by the user's hand, and even if this shield case is brought close to the human body so that the housing case 27 is brought close to the user's head, the deterioration of the antenna characteristics of the mobile phone 93 near the human body is greatly reduced. Can be reduced.

Further, in this portable telephone 93, the power absorbed by the human body, that is, SAR can be significantly reduced because the shield case is not operated as an antenna.

According to the above configuration, the second antenna unit 9
7, the composite antenna composed of the first helical antenna 98 and the second antenna member 108 is electrically connected to the rod antenna 102 on the balanced side of the balun 38, and the unbalanced transmission line 32 and the The composite antenna and the rod antenna 102 are fed through the balun 38 sequentially to operate as a substantially balanced antenna, and when the second antenna unit 97 is pulled out, the rod antenna 102 and the second antenna are placed on the balanced side of the balun 38. The helical antenna 99 and the composite antenna including the first antenna member 105 are electrically connected to each other, and the rod antenna 102 and the composite antenna are fed from the transmission / reception circuit 31 via the unbalanced transmission line 32 and the balun 38 in order. By operating as a balanced antenna, the first antenna described above can be used. As in the first embodiment, it is possible to prevent a shield case from operating as an antenna, to greatly reduce deterioration of antenna characteristics near a human body, and to realize a mobile phone that can significantly reduce a decrease in speech quality. Can be.

(8) Seventh Embodiment (8-1) Configuration of Mobile Phone According to Seventh Embodiment FIG. 28 (A) and FIG. 28 (B) are denoted by the same reference numerals. FIGS. 29 (A) and (B) show a mobile phone 110 according to the seventh embodiment. The mobile phone 93 according to the sixth embodiment described above except for the configuration of the antenna device 111 (see FIGS. (B)).

In this antenna device 111, the first and second cap-like antenna covers 11 are sequentially laminated on the rear surface 27 B of the upper end 27 C of the housing case 27.
2 and 113, a second helical antenna 99 is disposed inside the first antenna cover 112 with the second central axis substantially parallel to the longitudinal direction of the housing, and the second power supply member 59 , Seventh and eighth power supply members 100 and 101
Is arranged.

A first helical antenna 98 is arranged inside the second antenna cover 113 so that the first central axis substantially coincides with an extension of the second central axis, and the first power supply member 58 is provided. Is arranged. In addition, a balun 38 is provided inside the first antenna cover 112, and the balun 38 is electrically connected to the first and second power supply members 58 and 59 on the balanced side.

On the other hand, the second antenna section 97 is provided at the upper end 113A of the second antenna cover 113 so as to be able to be pushed and pulled out, and the first and second central axes of the first and second helical antennas 98 and 99 are provided. To be pushed or pulled along.

In the antenna device 111, when the second antenna portion 97 is pushed in, the antenna knob 63
Of the second antenna cover 113 to the upper end 11 of the second antenna cover 113.
3A so that the second antenna 97
From the inside of the second antenna cover 113 to the housing case 2.
7, the second antenna member 108 is moved inside and outside the upper end 112A of the first antenna cover 112 to the first and seventh feeding members 58 and 100.
And electrically connects the eighth power supply member 101 to the second power supply terminal 1 on the upper side inside the first antenna cover 112.
06 electrically.

As a result, in the antenna device 111, the second antenna 9
7 can be greatly shortened.

In the antenna device 111, the second
When pulling out the antenna section 97 of the second antenna section 9
7 is pulled out from the upper end 113A of the second antenna cover 113 to the outside, the seventh power supply member 100 is connected to the first power supply terminal 10 inside the first antenna cover 112.
3 and the first antenna member 105 is electrically connected to the second and eighth feeding members 59 and 101.

As a result, in the antenna device 111, the second antenna portion 97 is completely pulled out from the inside of the housing case 27, and the lower end of the second antenna portion 97 is placed above the inside of the first antenna cover 112. It can be separated from the upper end 27C of the housing case 27 so as to be located.

Therefore, in this portable telephone 110,
When the second antenna portion 97 is pushed in, the portion into which the second antenna portion 97 is pushed inside the casing case 27 is shortened as compared with the above-described sixth embodiment, so that the casing case 27 The second antenna unit 97 can be further moved away from the user's hand gripped by the user or the user's head to which the housing case 27 can be approached.

In portable telephone 110, when second antenna section 97 is pulled out, second antenna section 97 is pulled out.
Is completely pulled out of the housing case 27, the user's hand gripped by the housing case 27,
The second antenna unit 97 can be largely separated from the user's head to which the user can approach.

Further, in this portable telephone 110,
By arranging the first antenna section 96 above the upper end 27C of the housing case 27, the first antenna section 96 can also be kept away from the user's hand or head.

As a result, in this portable telephone 110, the deterioration of the antenna characteristics near the human body can be further reduced. In addition, the amount of power radiated from the first and second antenna units 96 and 97 to the human body can be reduced.

In the portable telephone 110, the first and second antenna sections 96 and 97 are structured so as to be kept away from the human body. Therefore, even when it is difficult to dispose the first antenna unit 96 or when it is difficult to push the second antenna unit 97 as a whole,
And the second antenna units 96 and 97 can be easily provided.

(8-2) Operation and Effect of Seventh Embodiment In the above configuration, in the portable telephone 110, the first and second antenna covers 112 and 113 are sequentially provided on the upper end 27C of the housing case 27. The first antenna unit 96 is arranged inside the first and second antenna covers 112 and 113, and the second antenna unit 97 is pushed into the upper end 113A of the second antenna cover 113. It was designed to be freely drawable.

In this portable telephone 110, when the second antenna unit 97 is pushed, the second antenna unit 97
Is pushed from the inside of the second antenna cover 113 through the inside of the first antenna cover 112 to the inside of the housing case 27, and when the second antenna portion 97 is pulled out, the second antenna portion 97 Pull out completely from inside

Therefore, in this portable telephone 110, the first antenna section 96 is arranged outside the housing case 27, and the second antenna section 9 is provided inside the housing case 27.
In order to shorten the portion into which the housing 7 is pushed in, the first and second antenna portions 96 and 97 should be kept away from the hand of the user holding the housing case 27 or the head of the user to whom the housing case 27 can be approached. Thus, deterioration of antenna characteristics near the human body can be further reduced.

According to the above configuration, the first antenna portion 96 is arranged inside the first and second antenna covers 112 and 113 stacked on the upper end 27C of the housing case 27, and the second antenna Upper end 1 of antenna cover 113
By providing the second antenna portion 97 in the 13A so as to be able to be pushed and pulled out freely, in addition to the effect obtained by the above-described sixth embodiment, the mobile phone 110
In use, the first and second antenna portions 96 and 97 can be kept away from the human body to further reduce deterioration of antenna characteristics near the human body.

(9) Eighth Embodiment (9-1) Configuration of Mobile Phone According to Eighth Embodiment FIG. 28 (A) and FIG. 28 (B) are denoted by the same reference numerals. 30A and 30B show a mobile phone 114 according to the eighth embodiment, and the mobile phone 93 according to the sixth embodiment described above except for the configuration of the second antenna unit 116 of the antenna device 115. (FIG. 28A and FIG. 28B).

In the first antenna section 116,
As shown in FIGS. 31A and 31B, a first feeding terminal 103 is electrically and mechanically connected to a lower end of a first antenna half 117 made of a conductive tubular member. At the upper end of the first antenna half 117, the pull-out stopper 11
8 is provided, and a second antenna half 119 made of a conductive rod-like member is provided so as to be inserted into a hole of the first antenna half 117 so as to be able to be pushed and pulled out.

A sliding spring 120 made of a conductive material is electrically and mechanically connected to the lower end of the second antenna half 119 located in the hole of the first antenna half 117. A second feeding terminal 106 is electrically and mechanically connected to an upper end of the second antenna half 119.

Further, the first and second antenna halves 1
17 and 119 are covered with antenna covers 121 and 122, respectively.

Thus, in the second antenna section 116, when the second antenna half 119 is pushed into or pulled out of the first antenna half 117, the first antenna half 117 Slide spring 12 in the hole
0 slides, and the first antenna half 117 and the second antenna half 119 are electrically connected via the sliding spring 120 to form a telescopic rod antenna.

Actually, the antenna device 115 (FIG. 30A)
In (B) and (B)), when the head 63A of the antenna knob 63 is pushed in the pushing direction when the second antenna 116 is pushed, the second antenna 119 is placed on the first antenna 117. The second antenna section 116 is pushed from inside the first antenna cover 95 to inside the housing case 27 while being pushed.

In the antenna device 115, when the head 63A of the antenna knob 63 is brought into contact with the upper end 95A of the first antenna cover 95, the first antenna half 117 is brought into contact with the second antenna half 119. A rod antenna is formed by pressing the whole to shorten the rod antenna, and the second antenna member 108 is connected to the first and seventh feed members 58 and 1.
00 and an eighth power supply member 101
Is electrically connected to the second power supply terminal 106.

As a result, in the antenna device 115, the rod antenna shortened in the second antenna unit 116 is formed, and the second antenna unit 11
The portion pushed into the inside of the housing case 27 can be shortened.

Therefore, in this portable telephone 114,
The second antenna portion 116 is pushed into the housing case 27 by a length corresponding to the shortened portion.
6 can be kept away from the hand of the user holding the housing case 27 or the user's head to which the housing case 27 can be approached, and the deterioration of the antenna characteristics near the human body can be further reduced.

Further, as the second antenna section 116 is moved away from the human body, the amount of power radiated from the shortened rod antenna and absorbed into the human body can be reduced.

In the antenna device 115, when the second antenna unit 116 is pulled out, the antenna knob 6
When the third head 63A is pulled in the pull-out direction, the second antenna portion 116 is pulled out from the upper end 95A of the first antenna cover 95 while pulling out the second antenna half 119 from the first antenna half 117. To pull it out.

In the antenna device 115, the first antenna half 117 is
When the antenna half 119 is fully pulled out, the first and second antenna halves 117 and 119 form an extended rod antenna, and the first feeding terminal 103 is electrically connected to the seventh feeding member 100. And the first
Antenna member 105 is electrically connected to the second and eighth power supply members 59 and 101.

Thus, in the portable telephone 114,
A relatively wide frequency band can be ensured by using the rod antenna both when pushing and pulling out the second antenna unit 116.

(9-2) Operation and Effect of Eighth Embodiment In the above configuration, the portable telephone 114
A second antenna in which a first antenna portion 96 is arranged over the inside of the antenna cover 95 and the inside of the housing case 27, and a telescopic rod antenna is formed at the upper end 95A of the first antenna cover 95. The portion 116 is provided so as to be able to be pushed and pulled out.

In the portable telephone 114, when the second antenna unit 116 is pushed in, the second antenna unit 1
In 16, a shortened rod antenna is formed by pushing the second antenna half 119 into the first antenna half 117, and the portion into which the second antenna portion 116 is pushed inside the housing case 27 is formed. shorten.

Therefore, in the portable telephone 114, when the second antenna 116 is pushed in, the second antenna 1
The second antenna portion 116 is moved from the hand of the user holding the housing case 7 or the head of the user to whom the housing case 27 is brought close, by the amount of shortening the portion pushed into the inside of the housing case 27. The antenna can be kept away, and thus the deterioration of antenna characteristics near the human body can be further reduced.

Further, in this portable telephone 114, when the second antenna section 116 is pushed in, the second antenna section 116 is shortened, so that the size of the housing case 27 can be reduced.

According to the above configuration, the first antenna section 96 is arranged over the inside of the first antenna cover 95 and the inside of the housing case 27, and the upper end 95A of the first antenna cover 95 is A second antenna unit 116 forming a telescopic rod antenna is provided so as to be able to be pushed and pulled out, and when the second antenna unit 116 is pushed in, a telescopic rod antenna is formed in the second antenna unit 116. Thus, in addition to the effects obtained by the above-described sixth embodiment, the housing case 27
By shortening the second antenna section 116 pushed into the inside, the second antenna section 116 is moved away from the human body, so that the deterioration of the antenna characteristics near the human body can be further reduced.

(10) Ninth Embodiment (10-1) Configuration of Cellular Phone According to Ninth Embodiment The parts corresponding to those in FIGS. 26A and 26B are denoted by the same reference numerals. 32A and 32B show a mobile phone 123 according to the ninth embodiment, and the mobile phone 79 according to the fourth embodiment described above except for the configuration of the antenna device 124 (see FIGS. 26A and 26B). (B)).

This antenna device 124 has a first antenna cover 125 provided on the back 27B side of the upper end 27C of the housing case 27, and the first antenna cover 125 is provided inside the first antenna cover 125. A first helical antenna 126 is arranged with the first central axis substantially parallel to the longitudinal direction of the housing.

A first feeding member 128 made of a conductive material is electrically and mechanically connected to the lower end of the first helical antenna 56, and the upper end of the first helical antenna 56 is made of a conductive material. The fifth power supply member 129 is electrically and mechanically connected.

The first and fifth power supply members 128 and 1
An upper end 27C of the housing case 27 and an upper end 125B of the first antenna cover 125 sandwich a predetermined side surface (hereinafter referred to as an antenna adjacent side surface) 125A of the first antenna cover 125 from above and below. It is arranged in.

A second helical antenna 57 is disposed inside the housing case 27 so that the second central axis is substantially parallel to the longitudinal direction of the housing and is displaced from the extension of the first central axis. I have. A sixth power supply member 130 made of a conductive material is electrically and mechanically connected to the lower end of the second helical antenna 57.

Further, a second antenna section 127 is provided at a predetermined position on the upper end 27C of the housing case 27 so as to be able to be pushed and pulled out.

In the second antenna section 127,
An antenna knob 131 made of a non-conductive material and having an L-shaped cross section is provided on the upper end of the rod antenna 60 via a fourth feeding member 62.
The antenna knob 131 is pushed in the pushing direction or pulled in the pulling-out direction, so that the second antenna 127 is attached to the first antenna cover 12.
5 is pushed or pulled out along the side surface 125A adjacent to the antenna.

The balun 38 provided inside the housing case 27 is electrically connected to the first and second power supply members 59 and 128 on the balanced side.

Therefore, in the antenna device 124,
When the second antenna portion 127 is pushed in, the head 131A of the antenna knob 131 is pushed in the pushing direction, and when the head 131A abuts against the upper end 27C of the housing case 27, the fourth power supply member 62 is turned off. While electrically connected to the second power supply member 59, the first short-circuit member 86 is electrically connected to the sixth power supply member 130, and thus the upper and lower ends of the second helical antenna 57 are connected to the rod antenna 60. To form a composite antenna.

On the other hand, in the antenna device 124, when the head 131A of the antenna knob 131 is pulled in the pulling-out direction when the second antenna 127 is pulled out, the second antenna 127 is moved to the first antenna. Cover 1
25 is pulled out of the housing case 27 while sliding the side surface 125A adjacent to the antenna.

In the antenna device 124, almost the entire second antenna section 127 is
7, the second short-circuit member 87 is electrically connected to the fifth power supply member 129, and the third power supply member 61 is electrically connected to the first power supply member 128. Thus, the upper and lower ends of the first helical antenna 56 are short-circuited to the rod antenna 60 to form a composite antenna.

Therefore, in the portable telephone 123, the first and fifth helical antennas 56 and 57 are not inserted into the first and fifth helical antennas 56 and 57.
In addition, it is not necessary to form the sixth power supply members 128, 129, and 130 in a ring shape, and the first, fifth, and sixth power supply members 12 may be formed in a rod shape, for example.
8, 129 and 130 can be simplified.

In this portable telephone 123,
Since the second antenna section 127 can be provided without requiring complicated alignment for inserting the first and second helical antennas 56 and 57 and the power supply member, the configuration of the antenna device 124 is simplified. be able to.

By the way, in this portable telephone 123,
By operating the rod antenna 60 as an antenna both when pushing and pulling out the second antenna section 127, a relatively wide frequency band can always be ensured.

(10-2) Operation and Effect of Ninth Embodiment In the above configuration, the portable telephone 123
And the second helical antennas 56 and 57 are arranged so that the first and second central axes are substantially balanced.
Between the extension of the central axis of the second antenna unit 12
7 was pushed in or pulled out.

Therefore, in this portable telephone 79, the second antenna section 127 is connected to the first and second helical antennas 56.
And 57 and the power supply member, and can be provided without complicated positioning. Thus, the configuration of the antenna device 124 can be simplified.

According to the above configuration, the first antenna unit 1
26, the first and second helical antennas 56 and 57 are arranged with the first and second central axes parallel to each other, and the second antenna section 127 is disposed between the first and second central axes.
Is provided so as to be able to be pushed and pulled out freely, in addition to the effect obtained by the above-described fourth embodiment, the first and second helical antennas 56 and 57 are provided.
The configuration of the antenna device 124 can be simplified because the second antenna unit 127 is not inserted through the second antenna unit 127.

(11) Other Embodiments In the above-described first to ninth embodiments, the case where the microstrip line 34 shown in FIG. 8 is applied as the unbalanced transmission line 32 will be described. However, the present invention is not limited to this, and a cylindrical outer conductor 135 (that is, the ground side) as shown in FIG.
Various other unbalanced transmission lines can be applied, such as a coaxial cable 137 formed such that the center conductor 136 (that is, the hot side) inserted through the cable is insulated from each other.

In the above-described first to ninth embodiments, the case where the phase shifter 41 formed by combining a plurality of the phase circuits 42 shown in FIG. 12 is used for the balun 38 shown in FIG. 11 will be described. However, the present invention is not limited to this. As shown in FIGS. 34A to 34C, the phase shifter is configured by connecting two capacitive reactance elements C3 and C4 in series,
One end of the inductive reactance element L4 is conductively connected to the connection midpoint P2, and the inductive reactance element L4 is connected.
T-type phase circuit 13 having a target structure having the other end grounded at 4
8 and one end of each of the capacitive reactance elements C5 and C6 are electrically connected to one end and the other end of the inductive reactance element L5, and the other ends of the capacitive reactance elements C5 and C6 are grounded. One of the inductive reactance elements C6 and L7 is electrically connected to one end and the other end of the capacitive reactance element C7, respectively. It is possible to shift the phase of a high-frequency signal by about 180 degrees in the operating frequency band, such as a combination of a plurality of π-type phase circuits 140 having a target structure in which the other ends of the reactive reactance elements L6 and L7 are grounded. If possible, a phase shifter having various other configurations can be used.

Further, in the above-described first to ninth embodiments, a case has been described in which the balun 38 shown in FIG. 11 is used. If a leakage current can be prevented from flowing to the ground side of the balanced transmission line 32, a balun having various other configurations can be used.

In practice, as a balun of this type, FIG.
A balun 142 having another configuration using an unbalanced transmission line 141 formed of a coaxial cable, and a coaxial cable (hereinafter, referred to as a balun) having an electrical length of 波長 wavelength at a used frequency at one end of a hot side 143 of the unbalanced transmission line 141. One end of the hot side 145 of the unbalanced transmission line 141 is electrically connected to one end of the hot side 145 of the unbalanced transmission line 141.
Is electrically connected to one end of the ground side 147 of the bypass path 144. That is, the balun 142 having such a configuration is different from the balun 38 shown in FIG.
Is used.

In the balun 142 having such a configuration, the first antenna element of the substantially balanced antenna is electrically connected to one end of the hot side 143 of the unbalanced transmission line 141, and the hot side 145 of the detour path 144 is connected. A second antenna element of this substantially balanced antenna is electrically connected to the other end of the antenna, and a high-frequency signal to be sent to the first antenna element via the hot side 143 of the unbalanced transmission line 141 is transmitted to the detour path 144. The phase is shifted by about 180 degrees from the first antenna element via the hot side 145 and is also transmitted to the second antenna element, thereby leaking from the second antenna element to the ground side 146 of the unbalanced transmission line 141. This prevents current from flowing.

As this type of balun, as shown in FIG. 36, first and second inductive reactance elements L8
And L9, and the first and second capacitive reactance elements C
8 and C9 are sequentially and alternately connected in a ring shape, and the hot side of an unbalanced transmission line (not shown) is electrically connected to a midpoint P3 between the first inductive reactance element L8 and the second capacitive reactance element C9. Connected to the first capacitive reactance element C8 and the second inductive reactance element L
9 is electrically connected to the ground side of the unbalanced transmission line at a connection point P4, and not shown at a connection point P5 between the first inductive reactance element L8 and the first capacitive reactance element C8. The first antenna element of the substantially balanced antenna is electrically connected, and the second inductive reactance element L8 and the second capacitive reactance element C
8 is connected to the second point P6 of this almost balanced antenna.
There is also a so-called LC bridge balun configured by electrically connecting the above antenna elements.

In the balun 148 having such a configuration, the inductances L of the first and second inductive reactance elements L8 and L9 are set to the same value, and the capacitance C of the first and second capacitive reactance elements C7 and C8 is set. Are set to the same value, and the inductance L and the capacitance C are calculated by the following equation.

[0264]

(Equation 1)

And the following equation

[0266]

(Equation 2)

By selecting so as to satisfy the following,
The high-frequency signal given from the hot side of the unbalanced transmission line is sent to the first antenna element from the connection midpoint P5 as it is, and this high-frequency signal is shifted by about 180 degrees with respect to the first antenna element in the used frequency band. The shifted high-frequency signal having the shifted phase is transmitted from the connection midpoint P6 to the second antenna element. Z1 represents the impedance between the hot side and the ground side of the unbalanced transmission line.
2 represents the impedance between the connection midpoints P5 and P6.
Further, f represents a used frequency.

The balun 148 having such a configuration can be formed as a fine chip of about 1 mm square, like the phase shifter 41 of the balun 38 shown in FIG. Of the first embodiment
The antenna cover 67 (FIGS. 23A and 23B) can be easily provided even when the arrangement space is limited.

Further, as this type of balun, FIG.
As shown in (A) and (B), an air-core coil 149 formed between the hot side and the ground side of an unbalanced transmission line (not shown) and the first and second antenna elements of a substantially balanced antenna. The transformer-type balun 151 facing the formed air-core coil 150, the air-core coil 152 formed between the hot side of the unbalanced transmission line and the first antenna element of the substantially balanced antenna, and the unbalanced There is also a transformer-type balun 154 in which an air-core coil 153 formed between the ground side of the transmission line and the second antenna element of the substantially balanced antenna is opposed.

In addition, as shown in FIG. 38, this type of balun includes an air-core coil 155 formed between the hot side of an unbalanced transmission line (not shown) and the first antenna element of a substantially balanced antenna. And an air-core coil 15 formed between the ground side of the unbalanced transmission line and the ground.
6 and the air-core coil 157 formed between the ground side and the second antenna element of the substantially balanced antenna, and the air-core coil 158 formed between the hot side and the ground. Transformer type balun 1
There are also 59.

Trans-type balun 1 having a related configuration
In 59, the impedance between the connection terminals of the first and second antenna elements is about four times (4Z3) the impedance Z3 between the hot side and the ground side of the unbalanced transmission line.

FIGS. 37A and 37B and FIG.
In the transformer type baluns 151, 154 and 159 shown in FIG.
Instead of 3, 155, 156, 157, 158, FIG.
As shown in FIG.
1 and a pair of coils 163 and 164 formed by the conductor pattern 162 can also be used.

The transformer baluns 151 and 154
And 159 can be formed by a fine chip having a size of about 1 to 3 [mm] as a whole when the conductor patterns are integrated and used as described above, and thus are similar to the above-described LC bridge balun 148 (FIG. 36). It can be easily provided even when the arrangement space is limited.

As this type of balun, FIG.
And (B) show an unbalanced transmission line 14 made of a coaxial cable.
1 is a balun 165 having another configuration using the cylindrical conductor 1.
66, one end 166A of the cylindrical conductor 166 is opened, and the other end 166A of the cylindrical conductor 166 is opened.
B is a so-called Sperrtopf balun or Bazooka balun short-circuited to the ground side 146 of the unbalanced transmission line 141.

In the balun 165 having such a configuration, the first antenna element of the substantially balanced antenna is electrically connected to the hot side 143 of the unbalanced transmission line 141 on the open side (balanced side) of the cylindrical conductor 166. As well as
The second antenna element of the substantially balanced antenna is electrically connected to the ground side 146 of the unbalanced transmission line 141, and the unbalanced transmission line 141 is connected to the short-circuited side (unbalanced side) of the cylindrical conductor 166. The transmission / reception circuit 31 is electrically connected to the hot side 143 and the ground side 146 of FIG.

In the balun 165, when the cylindrical conductor 166 is selected to have an electrical length of / 4 wavelength at the operating frequency, the unbalanced transmission line 141 as a whole is viewed from the balanced side to the unbalanced side. It can be regarded as a transmission line having an electrical length of 1/4 wavelength, in which one is short-circuited, with the inner conductor being the outer conductor and the cylindrical conductor 166 being the outer conductor. The leakage current can be prevented from flowing to the ground side 146 of the transmission line 141.

FIG. 41 shows a super-top balun 167 using an unbalanced transmission line 32 composed of a microstrip line. The hot side 36 is formed linearly as if it were a central conductor of a coaxial cable. By forming the ground side 37 into a shape that resembles the outer conductor of a coaxial cable and the cross section of a cylindrical conductor, it becomes equivalent to the super top balun 165 shown in FIGS.

FIG. 42 shows a balun 168 of another configuration using an unbalanced transmission line 141 formed of a coaxial cable.
A conductor (hereinafter, referred to as a branch conductor) 169 having an electrical length of / 4 wavelength is arranged with its other end aligned.
One end of the unbalanced transmission line 141 is electrically connected to one end of the hot side 143 of the unbalanced transmission line 141, and the other end of the branch conductor 169 is electrically connected to a portion of the unbalanced transmission line 141 facing the ground side 146. It is configured.

In the balun 168 having such a configuration, the first antenna element is electrically connected to the other end of the hot side 143 of the unbalanced transmission line 141, and the unbalanced transmission line 141
By electrically connecting the second antenna element to the other end of the ground side 146, a circuit equivalent to the baluns 165 and 167 shown in FIGS. 40A and 40B and FIG. Similarly to the baluns 165 and 167, the impedance at the other end of the hot side 143 of the unbalanced transmission line 141 is made infinite to prevent leakage current.

Furthermore, in the above-described first to ninth embodiments, a case has been described in which a substantially balanced antenna is used. However, the present invention is not limited to this, and it is completely structurally and electrically. It is also possible to use a symmetrically balanced antenna or an antenna having an intermediate excitation state that is completely asymmetrical structurally and electrically. By the way, when the antenna in the intermediate excitation form is used, the voltage forms in the first and second antenna elements are different, so that the above-described FIGS.
By using the baluns 165, 157, and 168 shown in (1), it is possible to prevent leakage current from flowing from the first or second antenna element to the ground side of the unbalanced transmission line.

Furthermore, in the first to ninth embodiments, the first wire formed by spirally winding a conductive wire is used.
And the second helical antennas 56, 98 and 57, 99
However, the present invention is not limited to this. As shown in FIGS. 43A and 43B, a helical antenna formed by a through hole 171 and a conductor pattern 172 in a multilayer wiring board 170 is used. Various other antenna elements may be used, such as 173 or an antenna element 176 in which a conductor pattern 175 is formed in a meandering shape on one surface 174A of the circuit board 174.

The second helical antennas 57 and 99
44A to 44C, an antenna element 177 (hereinafter, referred to as a thin linear antenna) linearly formed by a conductive thin plate, or a conductive thin plate Antenna element 178 formed in a meander shape, and antenna element 1 formed in a rectangular shape by a conductive thin plate
A thin antenna element such as 79 can be used inside or outside of the housing case 27, and using such an antenna element can prevent the housing case 27 from being enlarged.

When the thin linear antenna 177 is actually used in a portable telephone, for example, as shown in FIG. 45 where parts corresponding to those in FIGS. 20A and 20B are denoted by the same reference numerals, The linear antenna 177 may be attached to the inner wall of the housing case 27, and one end of the thin linear antenna 177 may be electrically connected to the second power supply member 59.

As shown in FIG. 46 where the same reference numerals are assigned to the corresponding parts in FIG. 26, this thin linear antenna 177 is attached to the inner wall of the casing case 27, and one end of the thin linear antenna 177 is provided. Is electrically connected to the second power supply member 59, and the other end is pressed when the second antenna unit 83 is pressed.
May be bent so as to be electrically connected to the short-circuiting member 87.

Further, the first and second embodiments described above,
In the fourth to seventh embodiments and the ninth embodiment, the case has been described in which the rod antennas 60 and 102 made of a conductive rod-shaped wire are used, but the present invention is not limited to this. As shown in FIG. 47, a closely-wound coil 180 which is formed by spirally and densely winding a conductive wire and electrically becomes a cylindrical conductor may be used as an antenna element. If this close-wound coil 180 is used as an antenna element, the second antenna units 55, 83, 97 and 1
27 can be prevented from being damaged even when bent when the 27 is pulled out.

Incidentally, the close-wound coil 180 is the same as the second antenna unit 7 in the third and eighth embodiments described above.
1 and 116 can be used as the first antenna halves 72 and 117. If the first antenna halves 72 and 117 are used, when the second antenna portions 71 and 116 are pulled out as described above, It is possible to prevent breakage even when bent.

In the third and eighth embodiments described above, the second embodiment provided with the extendable rod antenna shown in FIGS. 25A and 25B and FIGS. 31A and 31B is provided. Although the case where the antenna units 71 and 116 are used has been described, the present invention is not limited to this.
A second antenna unit 181 provided with a telescopic rod antenna configured as shown in FIGS. 48A and 48B in which parts corresponding to FIGS.
In addition, a second portion provided with a telescopic rod antenna configured as shown in FIGS. 49 (A) and (B) in which parts corresponding to those in FIGS. 31 (A) and (B) are assigned the same reference numerals. The antenna unit 182 may be used.

In practice, the second one shown in FIGS. 48 (A) and (B)
In the antenna section 181, the third feeding member 61 is electrically and mechanically connected to the lower end of the second second antenna half 74, and the upper end is connected to the first antenna half 72.
And is electrically and mechanically connected to the sliding spring 75. A pull-out stopper 73 is provided at the lower end of the first antenna half 72, and a fourth stop is provided at the upper end.
Are electrically and mechanically connected.
Thus, in the second antenna section 181, a stretchable rod antenna can be formed by the first and second antenna halves 72 and 74, similarly to the second antenna section 71 described above.

In the second antenna section 170 shown in FIGS. 49A and 49B, the first feeding terminal 103 is electrically and mechanically connected to the lower end of the second antenna half 119. Connected and the upper end is the first antenna half 1
17 and is electrically and mechanically connected to the sliding spring 75. Also, the first antenna half 11
7 is provided with a pull-out stopper 118 at the lower end, and the second power supply terminal 106 is electrically and mechanically connected to the upper end. Accordingly, in the second antenna unit 182 as well, as in the second antenna unit 116 described above,
The second antenna halves 117 and 119 can form a telescopic rod antenna.

Further, in the above-described first to ninth embodiments, the second antenna units 55, 71, 83, 97, 1
Although the case has been described where the housings 16 and 127 are provided so as to be able to be pushed and pulled out along a pushing direction substantially parallel to the longitudinal direction of the housing and a drawing direction opposite thereto, the present invention is not limited to this. As shown in FIGS. 50 (A) and (B) in which the same reference numerals are assigned to the corresponding parts, and FIGS. 51 (A) and (B) in which the same reference numerals are assigned to the corresponding parts to FIG. The second antenna unit 55 (71, 83, 97, 116)
And 127) are changed to the rear surface 27 of the upper end 27C of the housing case 27.
It may be provided so that it can be pushed and pulled out along the direction inclined from the B side to the longitudinal direction of the housing on the front side 27A side of the lower end 27D.

As a result, the second antenna units 55, 71,
When the user brings the mobile phone close to the head with 83, 97, 116 and 127 pulled out, the second antenna portions 55, 71, 83, 97, 116 and 127 can be further moved away from the head. Thus, the deterioration of the antenna characteristics near the human body of the mobile phone can be further reduced.

In the first to ninth embodiments, as described in the principle, the matching circuit is connected to the transmitting / receiving circuit 3.
1 and the balun 38, or between the balun 38 and the first and second antenna elements. However, the present invention is not limited to this. , The matching circuits 183 and 184 may be provided on both the balanced side and the unbalanced side of the balun 38.

Further, in the above-described first to ninth embodiments, the second balun 38 has a
The above description has been made on the case where the leakage current is prevented from flowing from the antenna element to the ground side of the unbalanced transmission line 32. However, the present invention is not limited to this. The connection of the two antenna elements may be switched to prevent leakage current from flowing from the first antenna element to the ground side of the unbalanced transmission line 32 due to the balance / unbalance conversion operation of the balun 38.

Further, in the first to ninth embodiments, the present invention is applied to the portable telephones 51, 65, and 6 described above.
9, 79, 89, 93, 110, 114 and 123 have been described. However, the present invention is not limited to this. For example, as in a cordless telephone handset,
In addition, it can be widely applied to various portable wireless devices.

Further, in the first to ninth embodiments, the rod antennas 60 and 102 and the first and second antenna halves 72 and 117 and 119, 7
4 has been described, but the present invention is not limited to this, and various other first antenna elements can be widely applied.

In the first to ninth embodiments, the first and second helical antennas 56, 98 and 5 are used as the fixed second and third antenna elements.
Although the case where 7,99 was applied was described,
The present invention is not limited to this, and various other second and third antenna elements can be widely applied.

Further, in the first to ninth embodiments, the unbalanced transmission means for performing the unbalanced conversion operation between the unbalanced transmission line and the second and third antenna elements is used. , The balun 38 is applied. However, the present invention is not limited to this, and it is possible to perform the conversion operation of the unbalance between the unbalanced transmission line and the second and third antenna elements. If such a method is used, various other baluns, such as the various baluns described above, can be widely applied.

Further, in the first to ninth embodiments described above, at least one of the second and third antenna elements is housed, and the first antenna element is pushed in and pulled out through the inside. , The first and second antenna covers 53, 67, 81, 91, 95, 112,
125, 68, 92, and 113 have been described. However, the present invention is not limited to this. At least one second and third antenna element is housed, and the first antenna element If it is pushed in and pulled out through it, various other storage means such as storage means integrated with the housing case 27 can be widely applied.

Further, in the first to ninth embodiments described above, any two of the first, second and third antenna elements are respectively balanced and unbalanced when the first antenna element is pushed in and out. First to fourth power supply members 58, 59, 6 as connection means for electrically connecting to a circuit.
1, 62, seventh and eighth power supply members 100 and 101,
Although the case where the first and second power supply terminals 103 and 106 and the first and second antenna members 105 and 108 are applied has been described, the present invention is not limited to this.
If any two of the first, second, and third antenna elements can be electrically connected to the balanced-unbalanced conversion circuit when the antenna element is pushed in and pulled out,
Various other connection means can be widely applied.

[0300]

As described above, according to the present invention, in the antenna device, the first push-pull and pull-out antenna devices are provided.
, Fixed second and third antenna elements, an unbalanced transmission line for feeding the first, second, and third antenna elements; the unbalanced transmission line; And a balance-unbalance conversion means for performing a balance-unbalance conversion operation with the third antenna element.
When the antenna element is pushed in, the first antenna element is electrically connected to the third antenna element to form a first composite antenna, and the second composite antenna is formed from the unbalanced transmission line through the balanced-unbalanced conversion means. The antenna element and the first composite antenna are fed to operate as an antenna, and when the first antenna element is pulled out, the first antenna element is electrically connected to the second antenna element to connect the second composite antenna. Forming
The second composite antenna and the third antenna element are fed from the unbalanced transmission line via the balanced-unbalanced conversion means to operate as antennas, so that the second antenna element and the first composite antenna can be operated as antennas. , When the second composite antenna and the third antenna element are operated as antennas, respectively, the second antenna element or the first composite antenna is converted to Preventing the leakage current from flowing from the second composite antenna or the third antenna element to the ground member to which the unbalanced transmission line is grounded via the unbalanced transmission line, whereby the ground member operates as an antenna. , The deterioration of antenna characteristics near the human body can be greatly reduced, and thus the deterioration of speech quality can be significantly reduced. It can be achieved antenna device.

Also, in the antenna device, power is supplied to the first antenna element provided so as to be able to be pushed and pulled out, the second and third fixed antenna elements, and the first, second and third antenna elements. An unbalanced transmission line for
A balance-unbalance conversion means for performing a balance-unbalance conversion operation between the unbalanced transmission line and the first, second, and third antenna elements; and Connecting means for electrically connecting the two first, second, and third antenna elements to the balanced-unbalanced conversion circuit are provided, and when the first antenna element is pushed in, the first antenna element is connected via the connecting means. And the second antenna element are electrically connected to the balanced-unbalanced conversion circuit, respectively, and the first and second antenna elements are fed from the unbalanced transmission line via the balanced-unbalanced conversion means to operate as antennas. When the first antenna element is pulled out, the first and third antenna elements are electrically connected to the balanced / unbalanced conversion circuit via the connection means, respectively, and the balanced / unbalanced conversion means is connected from the unbalanced transmission line. Then, the first and third antenna elements are fed to operate as antennas, so that the first and second antenna elements and the first and third antenna elements are operated as antennas, respectively. Sometimes, the unbalanced transmission line is grounded via the unbalanced transmission line from the first or second antenna element and the first or third antenna element due to the unbalanced conversion operation of the unbalanced conversion means. This prevents leakage current from flowing through the ground member, thereby preventing the ground member from operating as an antenna and greatly reducing the deterioration of antenna characteristics near the human body, thus deteriorating call quality. Can be greatly reduced.

Further, in a portable radio having an antenna device, a first antenna element provided to be able to be pushed and pulled out, second and third fixed antenna elements, first and second An unbalanced transmission line for feeding power to the second and third antenna elements, and a balance-unbalance conversion means for performing a balance-unbalance conversion operation between the unbalanced transmission line and the second and third antenna elements When the first antenna element is pushed in, the first antenna element is electrically connected to the third antenna element to form a first composite antenna, and the balanced unbalanced transmission line is connected to the unbalanced transmission line. The second antenna element and the first composite antenna are fed via the conversion means to operate as an antenna. When the first antenna element is pulled out, the first antenna element is connected to the second antenna. A second composite antenna is formed by electrically connecting the second composite antenna and the third antenna element from the unbalanced transmission line via the balanced-unbalanced conversion means to operate as an antenna. By doing so, the second antenna element and the first composite antenna,
When the second composite antenna and the third antenna element are operated as antennas, respectively, the second unbalanced / unbalanced conversion operation of the unbalanced / unbalanced conversion means causes the second antenna element or the first composite antenna to be connected to the second combined antenna and the second combined antenna. Composite antenna or third
This prevents the leakage current from flowing from the antenna element to the ground member to which the unbalanced transmission line is grounded via the unbalanced transmission line, thereby preventing the ground member from operating as an antenna and preventing the ground member from operating as an antenna. It is possible to significantly reduce deterioration of antenna characteristics, and thus to realize a portable wireless device that can significantly reduce deterioration of speech quality.

[0303] Further, in a portable radio having an antenna device, a first antenna element provided to be able to be pushed and pulled out of the antenna device, second and third fixed antenna elements, and first and second antenna elements are provided. And an unbalanced transmission line for feeding power to the third antenna element, and a balanced unbalance for performing an unbalanced conversion operation between the unbalanced transmission line and the first, second, and third antenna elements. Conversion means;
A connecting means for electrically connecting any two of the first, second and third antenna elements to the balanced / unbalanced conversion circuit when the first antenna element is pushed and pulled out, respectively, is provided. When pushing the antenna element,
The first and second antenna elements are electrically connected to the balanced / unbalanced conversion circuit via the connection means, respectively, and the first and second antenna elements are fed from the unbalanced transmission line via the balanced / unbalanced conversion means. When the first antenna element is pulled out, the first and third antenna elements are electrically connected to the balanced-unbalanced conversion circuit via connecting means, respectively, and the unbalanced transmission line is connected to the unbalanced transmission line. By feeding the first and third antenna elements via the balance converting means and operating them as antennas, the first and second antenna elements and the first and third antenna elements can be used as antennas, respectively. When the first and second antenna elements and the first or third antenna element are connected via the unbalanced transmission line by the balance / unbalance conversion operation of the balance / unbalance conversion means. To prevent leakage current from flowing to the ground member to which the unbalanced transmission line is grounded, thereby preventing the ground member from operating as an antenna and greatly reducing the deterioration of antenna characteristics near the human body. Thus, it is possible to realize a portable wireless device capable of greatly reducing the deterioration of the call quality.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a configuration of a balanced antenna.

FIG. 2 is a schematic voltage waveform diagram for explaining the operation of the balanced antenna.

FIG. 3 is a schematic diagram illustrating a configuration of an unbalanced antenna.

FIG. 4 is a schematic voltage waveform diagram for explaining the operation of the unbalanced antenna.

FIG. 5 is a schematic diagram illustrating a configuration of an intermediate excitation form antenna.

FIG. 6 is a schematic voltage waveform diagram for explaining an example of the operation of the intermediate excitation state antenna.

FIG. 7 is a schematic sectional view for explaining the principle of the mobile phone according to the present invention.

FIG. 8 is a schematic perspective view showing a configuration of an unbalanced transmission line composed of a microstrip line.

FIG. 9 is a schematic block diagram for explaining connection between an unbalanced transmission line, a rod antenna, and a helical antenna.

FIG. 10 is a schematic block diagram for explaining connection between an unbalanced transmission line using a balun, a rod antenna, and a helical antenna.

FIG. 11 is a block diagram illustrating a configuration of a balun.

FIG. 12 is a block diagram illustrating a configuration of a balun phase circuit.

FIG. 13 is a schematic diagram for describing the arrangement of a rod antenna, a helical antenna, and a shield case.

FIG. 14 is a schematic side view for explaining an arrangement of a rod antenna and a helical antenna with respect to a housing case.

FIG. 15 is a block diagram for explaining the arrangement of a matching circuit on the unbalanced side of the balun.

FIG. 16 is a block diagram for explaining the arrangement of a matching circuit on the balanced side of the balun;

FIG. 17 is a block diagram showing a configuration of a matching circuit arranged on the balanced side of the balun.

FIG. 18 is a schematic side view showing the first embodiment of the configuration of the mobile phone according to the present invention.

FIG. 19 is a schematic diagram for describing the arrangement of first and second antenna units and a shield case.

FIG. 20 is a block diagram showing an internal configuration of the mobile phone according to the first embodiment.

FIG. 21 is a schematic side view illustrating a configuration of a mobile phone according to a second embodiment.

FIG. 22 is a schematic diagram for describing the arrangement of first and second antenna units and a shield case.

FIG. 23 is a block diagram showing an internal configuration of a mobile phone according to a second embodiment.

FIG. 24 is a block diagram showing an internal configuration of a mobile phone according to a third embodiment.

FIG. 25 is a schematic sectional view showing the configuration of a second antenna unit.

FIG. 26 is a block diagram showing an internal configuration of a mobile phone according to a fourth embodiment.

FIG. 27 is a block diagram showing an internal configuration of a mobile phone according to a fifth embodiment.

FIG. 28 is a block diagram showing an internal configuration of a mobile phone according to a sixth embodiment.

FIG. 29 is a block diagram showing an internal configuration of a mobile phone according to a seventh embodiment.

FIG. 30 is a block diagram showing an internal configuration of a mobile phone according to an eighth embodiment.

FIG. 31 is a schematic sectional view showing a configuration of a second antenna unit.

FIG. 32 is a block diagram showing an internal configuration of a mobile phone according to a ninth embodiment.

FIG. 33 is a schematic diagram illustrating a configuration of an unbalanced transmission line including a coaxial cable according to another embodiment.

FIG. 34 is a block diagram showing a configuration of a phase circuit according to another embodiment.

FIG. 35 is a schematic diagram showing a configuration of a balun according to another embodiment.

FIG. 36 is a schematic diagram illustrating a configuration of a balun according to another embodiment.

FIG. 37 is a schematic diagram showing a configuration of a balun according to another embodiment.

FIG. 38 is a schematic diagram illustrating a configuration of a balun according to another embodiment.

FIG. 39 is a top view showing a coil used for a transformer type balun.

FIG. 40 is a schematic cross-sectional view and a schematic diagram illustrating a configuration of a super top balun using a coaxial cable according to another embodiment.

FIG. 41 is a schematic diagram showing a configuration of a super top balun using a microstrip line according to another embodiment.

FIG. 42 is a schematic diagram showing a configuration of a balun according to another embodiment.

FIG. 43 is a schematic top view showing a configuration of an antenna element replacing the first and second helical antennas according to another embodiment.

FIG. 44 is a schematic top view showing the configuration of a thin antenna element according to another embodiment.

FIG. 45 is a block diagram showing an internal configuration of a mobile phone using a thin linear antenna according to another embodiment.

FIG. 46 is a block diagram showing an internal configuration of a mobile phone using a thin linear antenna according to another embodiment.

FIG. 47 is a schematic diagram illustrating a configuration of an antenna element that replaces a rod antenna.

FIG. 48 is a schematic sectional view showing the configuration of an antenna unit provided with a telescopic rod antenna according to another embodiment.

FIG. 49 is a schematic sectional view showing a configuration of an antenna unit provided with a telescopic rod antenna according to another embodiment.

FIG. 50 is a schematic side view for explaining push-in and pull-out directions of a second antenna unit according to another embodiment.

FIG. 51 is a schematic side view for explaining a push-in and pull-out direction of a second antenna unit according to another embodiment;

FIG. 52 is a block diagram for explaining an arrangement of a matching circuit according to another embodiment;

FIG. 53 is a block diagram showing a circuit configuration of a conventional mobile phone.

FIG. 54 is a schematic front view for explaining the operation of a conventional shield case as an antenna.

[Explanation of symbols]

26, 51, 65, 69, 79, 89, 93, 110,
114, 123 ... mobile phone, 27 ... housing case,
28, 60, 102 ... rod antenna, 29 ... helical antenna, 30, 52, 66, 70, 80, 90,
94, 111, 115, 124 ... antenna device, 31
... Transceiving circuit, 32, 141 ... Unbalanced transmission line, 3
3 ... Shield case, 36, 143 ... Hot side, 3
7, 146 ... ground side, 38, 142, 148, 1
51, 154, 159, 165, 167, 168... Balun, 53, 67, 81, 91, 95, 112, 125
... First antenna cover, 54, 82, 96, 126
... First antenna unit, 55, 71, 83, 97, 11
6, 127, 181, 182... Second antenna unit, 5
6, 98 ... first helical antenna, 57, 99 ...
Second helical antenna, 58... First power supply member, 5
9 ... second power supply member, 61 ... third power supply member, 62
... A fourth power supply member, 68, 92, 113... A second antenna cover, 72, 117.
74, 119: second antenna half 100: seventh power supply member, 101: eighth power supply member, 103: first power supply terminal, 105: first antenna member, 106 ... Second power supply terminal, 108... Second
Antenna member.

Continued on the front page F term (reference) 5J021 AA02 AA13 AB02 CA03 DA02 EA01 FA33 FA34 HA10 5J046 AA02 AA03 AB06 AB07 AB12 JA01 JA05 JA10 JA13 5J047 AA02 AA03 AB06 AB07 AB12 FA09 FA12 FD01

Claims (22)

[Claims] A first antenna element provided so as to be able to be pushed and pulled out; fixed second and third antenna elements; and a power supply to the first, second and third antenna elements. An unbalanced transmission line; and a balance-unbalance conversion means for performing a balance-unbalance conversion operation between the unbalanced transmission line and the second and third antenna elements. At the time of pushing, the first antenna element is electrically connected to the third antenna element to form a first composite antenna, and the second composite antenna is formed from the unbalanced transmission line via the balanced-unbalanced conversion means. The first antenna element and the first composite antenna are fed and operated as an antenna. When the first antenna element is pulled out, the first antenna element is electrically connected to the second antenna element, and the first antenna element is electrically connected to the second antenna element. Two An antenna device comprising: forming a composite antenna; feeding the second composite antenna and the third antenna element from the unbalanced transmission line via the balanced-unbalanced conversion unit to operate as an antenna. 2. The first antenna element is formed in a rod shape, the second and third antenna elements are formed in a spiral shape, and the first antenna element is pushed or pulled out when the first antenna element is pushed or pulled out. The antenna device according to claim 1, wherein both ends or any one end is electrically connected to the antenna element. 3. The apparatus according to claim 2, further comprising storage means for housing at least one of said second and third antenna elements, said first antenna element being pushed in and out therethrough. The antenna device as described in the above. 4. The device according to claim 3, wherein the second and third antenna elements are arranged so that the first antenna element is pushed in and pulled out along a central axis of the helix. Antenna device. 5. The first antenna element is formed to extend and contract by inserting a conductive rod-shaped member into a hole of a conductive tubular member, and is shortened when the first antenna element is pushed in. The antenna device according to claim 4, wherein: 6. The first antenna element is formed in a rod shape, the second and third antenna elements are formed in a spiral shape, and the center axis of the spiral is set in the longitudinal direction of the first antenna element. 3. The antenna device according to claim 2, wherein the antenna device is arranged substantially in parallel with the antenna device. 7. A first antenna element provided so as to be able to be pushed and pulled out, second and third fixed antenna elements, and a power supply for feeding the first, second and third antenna elements. An unbalanced transmission line, the unbalanced transmission line, and a balance-unbalance conversion unit that performs a balance-unbalance conversion operation between the first, second, and third antenna elements; and the first antenna element. Connecting means for electrically connecting any two of the first, second and third antenna elements to the balanced / unbalanced conversion circuit at the time of pushing and pulling of the first antenna element. In some cases, the first and second antenna elements are electrically connected to the balanced / unbalanced conversion circuit via the connection means, respectively, and the first and second antenna elements are connected from the unbalanced transmission line via the balanced / unbalanced conversion means. Passing When the first antenna element is pulled out, the first and third antenna elements are electrically connected to the balanced-unbalanced conversion circuit via the connection means when the first antenna element is pulled out. An antenna device, wherein the first and third antenna elements are fed from the unbalanced transmission line via the unbalanced conversion means to operate as antennas. 8. The apparatus according to claim 7, further comprising a storage means for storing at least one of said second and third antenna elements, said first antenna element being pushed in and out therethrough. The antenna device as described in the above. 9. The first antenna element is formed in a rod shape, and the second and third antenna elements are arranged so that the first antenna element is pushed in and pulled out along a center axis of the helix. The antenna device according to claim 8, wherein the antenna device is arranged. 10. The first antenna element is formed so that a conductive rod-shaped member is inserted into a hole of a conductive tubular member so as to be expandable and contractable, and is shortened when the first antenna element is pushed. The antenna device according to claim 9, wherein: 11. The first antenna element is formed in a rod shape, the second and third antenna elements are formed in a spiral shape, and the center axis of the spiral is set in the longitudinal direction of the first antenna element. The antenna device according to claim 7, wherein the antenna device is arranged substantially in parallel with the antenna. 12. A portable wireless device having an antenna device, wherein the antenna device comprises: a first antenna element provided so as to be able to be pushed and pulled out; fixed second and third antenna elements; An unbalanced transmission line for feeding power to the second and third antenna elements; and an unbalanced transmission line for performing a balance-unbalance conversion operation between the unbalanced transmission line and the second and third antenna elements. The first antenna element is electrically connected to the third antenna element when the first antenna element is pushed in to form a first composite antenna, and the unbalanced transmission is performed. The second antenna element and the first composite antenna are fed from the line via the balance-unbalance conversion means to operate as an antenna, and when the first antenna element is pulled out, the Is electrically connected to the second antenna element to form a second composite antenna, and the second composite antenna and the second composite antenna are connected from the unbalanced transmission line via the balanced-unbalanced conversion means. A portable wireless device, wherein the portable wireless device operates as an antenna by feeding the antenna element of (3). 13. The first antenna element is formed in a rod shape, the second and third antenna elements are formed in a helical shape, and the first antenna element is pushed or pulled out when the first antenna element is pushed or pulled out. 13. The portable wireless device according to claim 12, wherein both ends or any one end are electrically connected to said antenna element. 14. A housing case into which the first antenna element is pushed and pulled out, wherein the antenna device is provided so as to protrude from the housing case, and includes at least one of the second and third antenna elements. Housed, the first
14. The portable wireless device according to claim 13, further comprising storage means for pushing and pulling out the antenna element through the inside. 15. The device according to claim 14, wherein the second and third antenna elements are arranged such that the first antenna element is pushed in and pulled out along a central axis of the helix. Portable radio. 16. The first antenna element is formed to extend and contract by inserting a conductive rod-shaped member into a hole of a conductive tubular member, and is shortened when the first antenna element is pushed in. The portable wireless device according to claim 15, wherein: 17. The first antenna element is formed in a rod shape, the second and third antenna elements are formed in a spiral shape, and the center axis of the spiral is set in the longitudinal direction of the first antenna element. 14. The portable wireless device according to claim 13, wherein the portable wireless device is arranged substantially in parallel with the portable wireless device. 18. A portable wireless device having an antenna device, wherein the antenna device comprises: a first antenna element provided so as to be able to be pushed and pulled out; fixed second and third antenna elements; And an unbalanced transmission line for feeding power to the second and third antenna elements; and an unbalanced transmission line, and an unbalanced transmission function between the first, second, and third antenna elements. A balance-unbalance conversion unit to be applied; and any two of the first, second, and third antenna elements are electrically connected to the balance-unbalance conversion circuit when the first antenna element is pushed in and out, respectively. Connecting means for electrically connecting the first and second antenna elements to the balanced / unbalanced conversion circuit via the connecting means when the first antenna element is pushed in. The first and second antenna elements are fed from the unbalanced transmission line via the balanced / unbalanced conversion means to operate as antennas, and when the first antenna element is pulled out, the first and second antenna elements are connected via the connection means. First and third antenna elements are electrically connected to the balanced / unbalanced conversion circuit, respectively, and the first and third antenna elements are fed from the unbalanced transmission line via the balanced / unbalanced conversion means. A portable wireless device characterized by operating as an antenna. 19. A housing case into which the first antenna element is pushed and pulled out, wherein the antenna device is provided so as to protrude from the housing case, and includes at least one of the second and third antenna elements. 19. The portable wireless device according to claim 18, further comprising a storage unit that is stored and pushed and pulled out of the first antenna element through the inside. 20. The first antenna element is formed in a rod shape, and the second and third antenna elements are arranged so that the first antenna element is pushed and pulled out along a center axis of the helix. The portable wireless device according to claim 19, wherein the portable wireless device is arranged. 21. The first antenna element is formed to extend and contract by inserting a conductive rod-shaped member through a hole of the conductive cylindrical member, and is shortened when the first antenna element is pushed. The portable wireless device according to claim 20, wherein: 22. The first antenna element is formed in a rod shape, the second and third antenna elements are formed in a spiral shape, and the center axis of the spiral is set in the longitudinal direction of the first antenna element. 19. The portable wireless device according to claim 18, wherein the portable wireless device is arranged substantially in parallel with.