JP2000315905A - Antenna structure and card type wireless terminal - Google Patents

Abstract

(57) Abstract: Provided is an antenna structure having high antenna performance when placed near a human body or a metal plate, and a card-type wireless terminal having high productivity with a simple structure using the antenna structure. thing. A slot antenna (1) formed on a printed circuit board is arranged such that an electric field direction (5) thereof is perpendicular to a housing surface of a card type wireless terminal (2) having a maximum area, so that a card type wireless terminal is provided. An antenna structure capable of enhancing antenna performance when the terminal 2 is placed near a human body or a metal plate, and a card-type wireless terminal having high radiation efficiency with a simple structure using the antenna structure are obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna structure incorporated in a card-type radio terminal mainly used in a mobile communication system such as a PHS, and more particularly to a high antenna performance when placed near a human body or a metal plate. The present invention relates to an antenna structure to be used and a card-type wireless terminal using the antenna structure.

[0002]

2. Description of the Related Art Conventionally, antennas built into a card type radio terminal include, for example, 280 to 900 as disclosed in JP-A-8-167809 and JP-A-8-250918.
A plate-shaped loop antenna for a MHz band pager or a printed loop antenna formed on a printed circuit board has been used.

[0003] For example, Japanese Patent Application Laid-Open No. 5-283925,
A built-in antenna for an IC card using a coil or a loop as disclosed in JP-A-6-328887 and JP-A-3-90109 has been used. Further, for example, Japanese Patent Laid-Open No. 2-1
50101, and a planar patch antenna as shown in JP-A-8-298411.

Further, for example, a foldable antenna as disclosed in JP-A-8-502633 has been used.
Further, for example, an antenna with a built-in battery case as disclosed in Japanese Patent Application Laid-Open No. H10-190331 has been used. Also,
For example, a printed pattern antenna formed on a circuit board as shown in Japanese Patent Application Laid-Open No. 6-334421 has been used.

[0005] For example, Japanese Patent Application Laid-Open Nos. 6-97713 and 3-16201 disclose other forms of terminal antenna.
As shown in FIG. 4, a loop antenna arranged perpendicular to the human body was used. This type of antenna is a small loop antenna having a loop length shorter than a half wavelength (for example, 1/5 wavelength or less). By making the loop surface perpendicular to the human body, a human body can be used at a frequency of about 280 MHz to 900 MHz. By the interaction with the image antenna generated on the side, a gain improvement (human body effect) of about 3 to 6 dB near the human body can be obtained. In this case, the main electric field direction of the loop antenna is parallel to the human body.

On the other hand, for a card-type wireless terminal using the PHS system, a high gain of 2.15 dBi (or more) is required for the antenna due to the line design of the PHS system. The dimensions of the housing of the card type terminal are generally Y
Direction (length) is 90 mm, X direction (width) is 50 mm, Z
The direction (thickness) is about 10 mm. Also, since the operating frequency is in the 1.9 GHz band (wavelength is about 158 mm), the dimension in the length direction (Y direction) of the terminal is a half wavelength (79 m).
m). Therefore, as a built-in antenna of such a card-type wireless terminal, a free-space gain such as a half-wavelength dipole or a one-wavelength loop antenna is 2.15.
More than dBi can be used.

[0007] As a usage form of such a card-type wireless terminal, a case where the wireless terminal is placed in a breast pocket of a human body clothes or a state where the wireless terminal is placed on a metal desk can be considered. In such a usage form, generally, the plane having the largest area including the length direction (Y direction) of the rectangular parallelepiped card-type wireless terminal is close to the human body or the metal plate in parallel. Even in such a state, it is necessary to secure a high antenna gain.

[0008]

SUMMARY OF THE INVENTION In the above-mentioned conventional plate-shaped loop antenna and printed loop antenna for a pager,
Low free space gain of -25 dBd or less, 1.9 GH
Not suitable for the z-band PHS system. Further, the above-described conventional built-in antenna for an IC card is an antenna on the premise of a low frequency band of several tens of MHz or less, and is 1.9.
It was not suitable for the GHz band PHS system.

Further, the above-mentioned conventional planar patch antenna,
The foldable antenna, the antenna in the battery case, and the printed pattern antenna have a problem that the antenna gain cannot be increased when a human body or a metal plate approaches the surface on which the antenna is disposed. Further, the conventional loop antenna vertically arranged on the human body is connected to a 1.9 GHz band PHS.
When applied to a system card type terminal, it is necessary to set the loop length of the antenna to about half a wavelength in order to secure a gain in free space. In this case, there is a problem that the gain improving effect near the human body is small, the bandwidth is narrow, and the matching circuit is complicated.

In the above-described half-wavelength dipole antenna and one-wavelength loop antenna, the length is a half-wavelength (79 m).
m), the antenna must be arranged in the length direction (Y direction) when it is built in a card type terminal. Therefore, the direction of the electric field of the antenna is the length direction (Y direction). When the card-type terminal is arranged near a human body or a metal plate, in most cases, the surface having the largest area including the length direction (Y direction) generally comes close to the human body or the metal plate in parallel. Therefore, in the above-described half-wavelength dipole antenna and one-wavelength loop antenna, when the human body or the metal plate approaches, the direction of the electric field of the antenna is parallel to the human body or the metal plate, and an equivalent image antenna generated on the human body or the metal plate side is used. There is a problem that the antenna gain is greatly deteriorated by the canceling action of

The present invention has been made to solve the above-mentioned conventional problems, and has an antenna structure having high antenna performance when placed near a human body or a metal plate, and a simple structure utilizing the antenna structure. And a card-type wireless terminal with high productivity.

[0012]

According to the present invention, there is provided an antenna structure in which a slot antenna is arranged so that an electric field direction thereof is perpendicular to a housing surface having a maximum area. It is. According to the present invention, by arranging the direction of the electric field of the slot antenna perpendicular to the human body or the metal plate, it is possible to obtain an antenna structure that can enhance the antenna performance when the slot antenna is arranged near the human body or the metal plate. .

Further, in order to solve the above problem, the antenna structure of the present invention is arranged such that the meander line antenna is arranged so that the direction of the electric field is perpendicular to the surface of the housing having the largest area. According to the present invention, by arranging the electric field direction of the meander line antenna perpendicular to the human body or the metal plate, an antenna structure capable of improving the antenna performance when arranged near the human body or the metal plate is obtained. Can be

Further, in order to solve the above problem, the antenna structure of the present invention is arranged such that the normal mode helical antenna is arranged so that the direction of the electric field is perpendicular to the case surface having the largest area. . The present invention provides an antenna structure that can enhance the antenna performance when placed in the vicinity of a human body or a metal plate by arranging the electric field direction of the normal mode helical antenna perpendicular to the human body or the metal plate. can get.

In order to solve the above-mentioned problems, the antenna structure of the present invention has a meander line antenna in which the direction of the electric field is perpendicular to the tip of a dipole antenna in which the direction of the electric field is parallel to the housing surface having the largest area. Are connected. The present invention is configured such that a meander line antenna whose electric field direction is perpendicular to the tip of a dipole antenna whose electric field direction is parallel to the housing surface is connected to a free space and a human body or a metal plate. In this state, an antenna structure capable of increasing the radiation efficiency of the entire antenna system can be obtained.

According to the antenna structure of the present invention, in order to solve the above problem, the first element of the dipole antenna is close to the first housing surface, and the second element of the dipole antenna is close to the second housing surface. Then, a first meander element is connected to the tip of the first element of the dipole antenna such that the tip faces the second housing surface, and the second meander element is connected to the tip of the second element of the dipole antenna. The connection is made so as to face the first housing surface. According to the present invention, the free space and the human body or the metal plate can be adjusted to either the card-type wireless terminal by bringing two dipole elements close to both sides of the card-type wireless terminal and connecting the vertical meander element to the tip of the two dipole elements. An antenna structure that can increase the radiation efficiency of the entire antenna system even when the antenna is close to the surface is obtained.

In order to solve the above problem, the antenna structure of the present invention has a meander line in which the direction of the electric field is perpendicular to a part of the loop antenna in which the direction of the electric field is parallel to the housing surface having the largest area. An antenna is connected. According to the present invention, by connecting the vertical meander element to the tip of the loop element, an antenna structure having high antenna performance can be obtained in any state where the free space and the human body or the metal plate are in close proximity.

Further, in order to solve the above-mentioned problem, the antenna structure of the present invention connects a first meander element to a part of the loop antenna such that a tip of the first meander element faces the first housing surface, and The second meander element is connected to the other part so that the tip of the second meander element faces the second housing surface. The present invention is configured such that the two vertical meander elements are connected to the end of the loop element so as to be directed toward the facing housing surfaces, so that in any state where the free space and the human body or the metal plate are close to each other, Further, even when the human body or the metal plate is brought close to either side of the card-type wireless terminal, an antenna structure that can increase the radiation efficiency of the entire antenna system can be obtained.

Further, in order to solve the above-mentioned problem, the card-type radio terminal of the present invention comprises a diversity antenna for switching between a plurality of antennas having the above-mentioned antenna structure of the present invention. According to the present invention, by switching and using a plurality of antennas having the antenna structure of the present invention, it is possible to enhance the antenna performance in any state arranged in a free space and near a human body or a metal plate. A card-type wireless terminal that can be obtained is obtained.

In order to solve the above-mentioned problems, the card-type wireless terminal of the present invention has an antenna whose electric field direction is parallel to a housing surface having a maximum area, and an antenna having the above-described antenna structure of the present invention. And a diversity antenna for switching between the two. The present invention improves the antenna performance when placed near a human body or a metal plate by switching between an antenna whose electric field direction is parallel to the housing surface and an antenna having the antenna structure of the present invention. And a card-type wireless terminal capable of performing such operations.

According to another aspect of the present invention, there is provided a card-type wireless terminal, comprising: a plurality of antennas each configured by a pattern on a printed circuit board having the above-described antenna structure; It is configured to be switched by a switch. According to the present invention, by switching a plurality of antennas on a printed circuit board with a high-frequency switch mounted on the printed circuit board, antenna performance can be enhanced when the antenna is arranged near a human body or a metal plate, and a simple structure can be achieved. A card-type wireless terminal having a structure and high productivity can be obtained.

In order to solve the above problem, the card type radio terminal according to the present invention has a first antenna disposed on a first housing surface having a maximum area and a second antenna mounted on the first housing surface. This is arranged on a second housing surface different from the above. According to the present invention, by arranging two antennas having different electric field directions on different housing surfaces, the antenna performance can be improved when the antenna is arranged near a human body or a metal plate. A highly reliable card-type wireless terminal can be obtained.

In order to solve the above-mentioned problem, the card-type wireless terminal of the present invention mounts a printed circuit board having an antenna in a pattern perpendicularly to a circuit board of the card-type wireless terminal, and connects the printed circuit board to the power supply section of the printed circuit board. Power is supplied to the circuit board by the mounting terminals. The present invention is such that the printed circuit board on which the antenna is formed is vertically fixed to the circuit board by the mounting terminal,
With a simple structure, a card-type wireless terminal with high productivity that can reduce the number of power supply lines and simplify the assembly process can be obtained.

Further, in order to solve the above problem, the card type radio terminal of the present invention mounts a printed circuit board having an antenna formed of a pattern on a housing of the card type radio terminal.
Power is supplied to the circuit board by a cable from a power supply section of the printed circuit board. The present invention secures the antenna performance by fixing the printed circuit board on which the antenna is formed vertically to the housing, and makes it easy to replace the antenna in a separate process from the circuit board. Thus, a card-type wireless terminal that is advantageous in terms of production and maintenance can be obtained.

In order to solve the above-mentioned problems, the card-type wireless terminal according to the present invention is configured such that the antenna is formed of a conductor pattern printed or vapor-deposited on a housing, and a feeder of the conductor pattern is connected to a circuit board by a cable. The power is supplied. According to the present invention, since the antenna is configured by the conductor pattern on the inner surface of the housing, the number of parts and the number of manufacturing steps can be reduced while ensuring higher antenna performance. A high card type wireless terminal can be obtained.

Further, in order to solve the above-mentioned problem, the card type wireless terminal of the present invention is configured such that a metal terminal mounted on a circuit board is brought into contact with a feeding portion of an antenna to feed power. The present invention, by feeding power by a contact terminal mounted on a circuit board or a printed circuit board on the antenna side, antenna performance can be enhanced when placed near the human body or a metal plate, and parts The number of points and manufacturing steps can be reduced, and a card-type wireless terminal with a simple structure and high productivity can be obtained.

Further, in order to solve the above problem, the card type radio terminal of the present invention is configured such that a metal terminal mounted on a printed circuit board constituting an antenna is brought into contact with a circuit board to supply power. . The present invention, by having a contact terminal mounted on a printed circuit board and assembling it by contacting the power supply unit of the circuit board, it is possible to enhance the antenna performance when placed near the human body or a metal plate, The number of parts and the number of manufacturing steps can be reduced, and a card-type wireless terminal with a simple structure and high productivity can be obtained.

In order to solve the above-mentioned problem, the card-type wireless terminal of the present invention is configured such that a component constituting a matching circuit is mounted on a surface of the printed circuit board on which the antenna is formed on the inside of the housing. is there. According to the present invention, by mounting a matching circuit on a printed circuit board on which an antenna is configured, antenna performance can be enhanced when the antenna is arranged near a human body or a metal plate, and productivity is high with a simple structure. A card-type wireless terminal is obtained.

In order to solve the above-mentioned problem, the card-type wireless terminal according to the present invention is configured such that a part of the housing near the antenna projects in the direction of the housing surface having the largest area. The present invention provides a card-type wireless terminal capable of ensuring higher antenna performance by providing a protrusion near an antenna of a housing to increase the distance between the antenna and a human body or a metal plate. Can be

Further, in order to solve the above-mentioned problem, the card-type wireless terminal according to the present invention is configured such that a part or all of a surface of a housing on which an antenna is arranged is formed in an arc shape. The present invention provides a curved surface on a surface parallel to the antenna of the housing to prevent the antenna surface from being in close contact with the metal plate, and to increase the distance between the antenna and the antenna even if the antenna surface is in close contact. A card-type wireless terminal that can ensure higher performance can be obtained.

Further, in order to solve the above-mentioned problem, the card-type wireless terminal of the present invention has an operation switch disposed on the side of the housing facing the housing surface on which the antenna is provided. The present invention, by arranging the operation switch as far as possible from the antenna of the housing,
A card-type wireless terminal that can reduce deterioration of antenna performance during operation can be obtained.

[0032]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention relates to a structure of an antenna built in a card-type wireless terminal, wherein the direction of the electric field is perpendicular to the housing surface having the largest area. The slot antenna is arranged, and by arranging the direction of the electric field of the slot antenna perpendicular to the human body or the metal plate, the housing shape of the card type wireless terminal is efficiently used, This has the effect that the antenna performance can be enhanced when placed near the human body or a metal plate.

According to a second aspect of the present invention, there is provided a structure of an antenna built in a card type wireless terminal, wherein a meander line antenna is arranged so that its electric field direction is perpendicular to a housing surface having a maximum area. The direction of the electric field of the meander line antenna is arranged perpendicular to the human body or the metal plate, so that the housing shape of the card-type wireless terminal is efficiently used, This has the effect that the antenna performance can be enhanced when it is arranged near the metal plate.

According to a third aspect of the present invention, there is provided a structure of an antenna built in a card-type wireless terminal, wherein a normal mode helical antenna is arranged so that its electric field direction is perpendicular to a housing surface having a maximum area. The normal mode helical antenna electric field direction is arranged perpendicular to the human body or the metal plate, by using the housing shape of the card-type wireless terminal efficiently, This has the effect that the antenna performance can be enhanced when placed near the human body or a metal plate.

According to a fourth aspect of the present invention, there is provided a structure of an antenna incorporated in a card-type wireless terminal, wherein the antenna has an electric field direction parallel to a housing surface having a maximum area. A meander line antenna whose electric field direction is perpendicular to the housing surface is connected, and a meander line antenna whose electric field direction is perpendicular to the tip of a dipole antenna whose electric field direction is parallel to the housing surface. Is connected, has the effect that the radiation efficiency of the entire antenna system can be increased in any state where the antenna system is arranged in a free space and near a human body or a metal plate.

According to a fifth aspect of the present invention, the first element of the dipole antenna is close to the first housing surface having a maximum area, and the second element of the dipole antenna is connected to the first housing surface. A first meander element is connected to the tip of the first element of the dipole antenna such that the tip faces the second housing face, and the second element of the dipole antenna is connected to the second element. The second at the tip of the element
Is connected so that the tip of the meander element faces the first housing surface, and two dipole elements are respectively brought close to both sides of the card-type wireless terminal,
By connecting the vertical meander element to the tip, the radiation efficiency of the entire antenna system can be increased even when the free space and the human body or metal plate are close to either surface of the card type wireless terminal. Has an action.

According to a sixth aspect of the present invention, there is provided a structure of an antenna built in a card-type wireless terminal, wherein a part of a loop antenna whose electric field direction is parallel to a housing surface having a maximum area. A meander line antenna whose electric field direction is perpendicular to the housing surface is connected to the end of the loop element so that the free space and the human body or metal plate are close to each other. In any of the states described above, there is an effect that the antenna performance can be improved.

According to a seventh aspect of the present invention, a first meander element is connected to a part of the loop antenna such that a tip of the first meander element faces a first housing surface having a maximum area,
A second meander element is connected to the other part of the loop antenna such that a tip of the second meander element is directed to a second housing surface facing the first housing surface. By connecting the two vertical meander elements so as to face the facing housing surfaces,
It can be said that the radiation efficiency of the entire antenna system can be increased in any state where the free space and the human body or the metal plate are close to each other, and even when the human body or the metal plate is close to either side of the card type wireless terminal. Has an action.

According to the invention described in claim 8 of the present invention, the first antenna is disposed on the first housing surface having the maximum area, and the second antenna is provided on the second housing surface different from the first housing surface. An antenna structure according to claim 1, 2, 3, 4, 5, 6, or 7, wherein the antenna is arranged on a housing surface and at least one of the first and second antennas has the antenna structure according to claim 1, 2, or 3. By arranging the two antennas on different housing surfaces, the antenna performance can be enhanced when the antenna is arranged near a human body or a metal plate, and the productivity can be increased with a simple structure. Having.

According to a ninth aspect of the present invention, an antenna having the antenna structure according to the first, second, third, fourth, fifth, sixth or seventh aspect is constituted by a pattern on a printed circuit board.
The printed circuit board is mounted vertically to the circuit board of the card-type wireless terminal.Since the printed circuit board on which the antenna is formed is fixed vertically to the circuit board by the mounting terminals, a simple The structure has the effect of reducing the number of power supply lines, simplifying the assembly process, and increasing productivity.

Hereinafter, embodiments 1 to 13 of the present invention will be described in detail with reference to the accompanying drawings and FIGS. (First Embodiment) First, a configuration of an antenna structure according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a perspective view showing the configuration of a card-type wireless terminal incorporating the antenna structure according to the first embodiment.
In FIG. 1, reference numeral 1 denotes a slot antenna, 2 denotes a card-type wireless terminal, 3 denotes a wireless circuit unit, 4 denotes a human body or a metal plate, and 5 denotes a direction of an electric field.

In FIG. 1, the slot antenna 1 is formed of, for example, a copper foil pattern on a printed circuit board, and the slot length is set to about a half wavelength (about 79 mm in a 1.9 GHz band). The card-type wireless terminal 2 is a PHS terminal having a transmission / reception function, for example, in the 1.9 GHz band, and its dimension is, for example, 90 m in the Y direction (length).
m, X direction (width) is 50 mm, Z direction (thickness) is 10 m
m. The card-type wireless terminal 2 is configured by incorporating the slot antenna 1 and the wireless circuit unit 3 in a resin housing. The wireless circuit unit 3 is a transmission / reception function unit including a battery, and is generally covered with a metal shield case.

When the card-type wireless terminal 2 having such a shape is inserted into a breast pocket of a human body or placed on a metal desk, the surface of the housing having the largest area (the surface parallel to the XY plane). Is parallel to the human body or the metal plate 4. High antenna performance is required in such an arrangement state near a human body or a metal plate. The slot antenna 1 is disposed so as to be perpendicular to a surface of the housing of the card type wireless terminal 2 having the largest area (that is, to a human body or a metal plate).

In the antenna structure configured as described above, the direction of the electric field of the slot antenna 1 is in the Z direction as indicated by an arrow 5. Therefore, slot antenna 1
The main polarization direction radiated from is the Z direction.

Next, the operation of the antenna structure according to the first embodiment of the present invention will be described with reference to FIG. First, it is assumed that a half-wave dipole antenna is built in, for example. Since the half-wavelength dipole antenna needs a full length of half a wavelength (79 mm in the 1.9 GHz band), it must be arranged in the Y direction in the card-type wireless terminal of the present embodiment. In this case, the half-wave dipole antenna and the human body or the metal plate 4 are parallel to each other, and an electromagnetic field canceling action occurs between the human body or the image antenna equivalently generated on the metal plate 4 side, and the radiation efficiency is reduced. Degrades significantly.

On the other hand, in the slot antenna 1 of the present embodiment, since the human body or the metal plate 4 is perpendicular to the direction of the electric field of the slot antenna 1, the image antenna and the slot which are equivalently generated on the human body or the metal plate 4 side. No electromagnetic field canceling action occurs between the antenna 1 and the antenna 1. That is, the human body or the metal plate 4 operates as an equivalent infinite ground plane, and the slot antenna 1 operates as a vertical electric field antenna on the infinite ground plane. As a result, the human body or metal plate 4
, The radiation efficiency of the entire antenna system can be increased.

As described above, the feature of the antenna structure in the present embodiment is that the electric field direction of the slot antenna having a half wavelength is arranged perpendicularly to the human body or the metal plate, so that the card type wireless terminal can be used. The point is that the radiation efficiency of the entire antenna system can be increased by using the housing shape efficiently. As is clear from the above description, the antenna structure according to the present embodiment can enhance the antenna performance when it is arranged near a human body or a metal plate.

The configuration and size of the slot antenna in the present embodiment are not limited to those described above, and similar effects can be obtained with a similar configuration. Also,
The dimensions of the card-type wireless terminal are not limited to those described above in the description of the present embodiment, and similar effects can be obtained with a similar configuration.

(Second Embodiment) First, a configuration of an antenna structure according to a second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a perspective view showing the configuration of a card-type wireless terminal incorporating the antenna structure according to the second embodiment. In FIG. 2, reference numeral 6 denotes a meander line antenna, which is formed of, for example, a copper foil pattern on a printed circuit board, its height is set to 10 mm, and the electric length of the meander line is about a quarter wavelength (about 1/4 wavelength). 39 mm). 1 are the same as those in FIG. 1 and operate in the same manner.

The meander line antenna 6 is arranged so as to be perpendicular to the surface of the housing of the card type radio terminal 2 having the largest area (that is, to the human body or the metal plate). In the antenna structure configured as described above, the direction of the electric field of the slot antenna 1 is Z
Direction. Therefore, the main polarization direction radiated from the meander line antenna 6 is the Z direction.

Next, the operation of the antenna structure according to the second embodiment of the present invention will be described with reference to FIG. In the meander line antenna 6 according to the present embodiment, since the human body or the metal plate 4 is perpendicular to the electric field direction of the meander line antenna 6, the image antenna and the meander line antenna 6 equivalently generated on the human body or the metal plate 4 side No electromagnetic field canceling action occurs between the two. That is, the human body or the metal plate 4 operates as an equivalent infinite ground plane, and the meander line antenna 6 operates as a vertical electric field antenna on the infinite ground plane. As a result, the radiation efficiency of the entire antenna system including the human body or the metal plate 4 can be increased.

Also, when a normal mode helical (vertical mode helical) antenna is arranged instead of the meander line antenna 6, the radiation efficiency of the entire antenna system can be similarly increased.

As described above, the feature of the antenna structure in the present embodiment is that the direction of the electric field of the meander line antenna or the normal mode helical antenna is arranged perpendicular to the human body or the metal plate, so that the entire antenna system is formed. Radiation efficiency can be increased. As is clear from the above description, the antenna structure according to the present embodiment can enhance the antenna performance when it is arranged near a human body or a metal plate.

(Third Embodiment) First, a configuration of an antenna structure according to a third embodiment of the present invention will be described with reference to FIG. FIG. 3 is a perspective view showing a configuration of a card-type wireless terminal incorporating the antenna structure according to the third embodiment. In FIG. 3, reference numeral 7 denotes a printed circuit board;
Denotes a dipole element, and 10 and 11 denote meander elements.
1 are the same as those in FIG. 1 and operate in the same manner.

In FIG. 3, the printed circuit board 7 is disposed vertically inside the housing of the card type wireless terminal 2 with respect to the human body or the metal plate 4. The dipole elements 8, 9 and the meander elements 10, 11 are formed by a copper foil pattern on the printed circuit board 7. The dipole element 8 is arranged close to the human body of the housing of the card type wireless terminal 2 or the surface opposite to the metal plate 4. At the tip of the dipole element 8, a meander element 10 is vertically arranged with its tip facing the human body or the metal plate 4 side.
On the other hand, the dipole element 9 is arranged close to the human body or the metal plate 4 side. At the tip of the dipole element 9, a meander element 11 is vertically arranged with its tip facing the human body or the opposite side of the metal plate 4.

Next, the operation of the antenna structure according to the third embodiment of the present invention will be described with reference to FIG. In the antenna structure according to the present embodiment configured as described above, the dipole elements 8 and 9 and the meander element 1
0 and 11 are excited as one dipole antenna system. Here, the direction of the electric field of the radiation from the dipole elements 8 and 9 is in the Y direction parallel to the human body or the metal plate 4.
On the other hand, the radiation from the meander elements 10 and 11 has the electric field direction in the Z direction perpendicular to the human body or the metal plate 4.
Therefore, the dipole elements 8, 9 and the meander element 1
The antenna system composed of 0 and 11 has a Y direction and a Z direction.
It operates as an antenna containing both polarization components in the directions.

Here, in a free space that is not close to the human body or the metal plate, the above-mentioned antenna system operates for both the polarization components in the Y direction and the Z direction, and thus has practically high antenna performance. On the other hand, when it is close to the human body or the metal plate, the dipole element 9 is close to the human body or the metal plate 4 in the arrangement of the human body or the metal plate 4 shown in FIG. The current distribution on the dipole element 9 is reduced by the neutralizing action. However, the dipole element 8 is separated from the human body or the metal plate 4, and a sufficient current is excited in the dipole element 8 and the meander element 10. Therefore, since the direction of the electric field of the meander element 10 is perpendicular to the human body or the metal plate 4, an electromagnetic field canceling action does not occur. As a result, the radiation efficiency of the entire antenna system including the human body or the metal plate 4 can be increased.

In FIG. 3, when the human body or the metal plate 4 is present on the side of the card type radio terminal close to the dipole element 8, the meander element 11 is It functions as a radiating element perpendicular to 4, and can increase the radiation efficiency of the entire antenna system.

As described above, one of the features of the antenna structure according to the present embodiment is that the vertical meander element is connected to the tip of the dipole element, so that the free space and the human body or the metal plate are close to each other. In this state, the radiation efficiency of the entire antenna system can be increased.

Another feature of the present embodiment is that
The two dipole elements are placed close to both sides of the card-type wireless terminal, and the vertical meander element is connected to the tip of the two dipole elements, so that the antenna system can be used even when the human body or the metal plate approaches either side of the card-type wireless terminal. The point is that the overall radiation efficiency can be increased.

As is clear from the above description, according to the antenna structure of the present embodiment, the antenna performance can be enhanced in any state where the antenna is arranged in a free space and near a human body or a metal plate.

(Fourth Embodiment) First, the configuration of an antenna structure according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 4 is a perspective view showing the configuration of a card-type wireless terminal incorporating the antenna structure according to the fourth embodiment. In FIG. 4, reference numeral 12 denotes a loop element.
1 to 3 are the same as those in FIGS. 1 to 3 and operate similarly.

In FIG. 4, the printed circuit board 7 is disposed inside the housing of the card type wireless terminal 2 perpendicular to the human body or the metal plate 4. Loop element 12 and meander element 1
0 and 11 are formed by a copper foil pattern on the printed circuit board 7. The circumference of the loop element 12 is about half a wavelength (about 79 m).
m). A meander element 10 is disposed in a part of the loop element 12 with its tip directed toward the human body or the metal plate 4 side. In addition, a meander element 11 is disposed on another part of the loop element 12 with its tip facing the human body or the opposite side of the metal plate 4.

Next, the operation of the antenna structure according to the fourth embodiment of the present invention will be described with reference to FIG. In the antenna structure according to the present embodiment configured as described above, loop element 12 and meander elements 10, 1
1 is excited as one antenna system. Here, the direction of the electric field of the radiation from the loop element 12 is the Y direction parallel to the human body or the metal plate 4. The main radiation directions are the Z and -Z directions. Therefore, when the human body or the metal plate 4 is present, the image antenna equivalently generated on the human body or the metal plate 4 side is excited in-phase, so that the radiation is concentrated in the Z direction.

On the other hand, the radiation from the meander elements 10 and 11 is applied to the Z direction whose electric field direction is perpendicular to the human body or the metal plate 4.
Direction. Therefore, the antenna system formed by the loop element 12 and the meander elements 10 and 11 has a Y direction and a Z direction.
It operates as an antenna containing both polarization components in the directions. Therefore, in a free space that is not close to the human body or the metal plate 4, the above-described antenna system operates for both the Y-direction and the Z-direction polarization components, and thus has practically high antenna performance.

On the other hand, when the human body or the metal plate 4 is close to the human body or the metal plate 4, the radiation is efficiently emitted in the Z direction from the loop element 12, and the direction of the electric field of the meander elements 10 and 11 is perpendicular to the human body or the metal plate 4. Therefore, no electromagnetic canceling action occurs. As a result, the radiation efficiency of the entire antenna system including the human body or the metal plate 4 can be increased.

As described above, the feature of the antenna structure according to the present embodiment is that the vertical meander element is connected to the tip of the loop element so that the free space and the human body or the metal plate can be brought close to each other. Also, the radiation efficiency of the entire antenna system can be increased. As is clear from the above description, according to the antenna structure of the present embodiment, the antenna performance can be improved in any state of being placed in a free space and near a human body or a metal plate.

(Fifth Embodiment) First, the configuration of a card-type wireless terminal using the antenna structure of the present invention in the fifth embodiment of the present invention will be described with reference to FIG.
FIG. 5 is a perspective view and a partially enlarged view showing the configuration of a card-type wireless terminal using the antenna structure of the present invention in the fifth embodiment. In FIG. 5, 13 is a dipole element, 14 is a balun, 15 is a meander element, 16 and 17 are strip lines, and 18 is a high-frequency switch. 1 to 4 are the same as those in FIGS. 1 to 4 and operate similarly.

In FIG. 5, the dipole element 13 and the meander element 15 are formed by a copper foil pattern on the printed circuit board 7. The length of the dipole element 13 is set to about a half wavelength (about 79 mm), and the direction of the electric field is arranged in a direction parallel to the human body or the metal plate 4 (Y direction). A balun 14 is connected to the feeding point of the dipole element 13,
In the balun 14, a balance-unbalance conversion is performed. The unbalanced converted signal is transmitted by a strip line 16 formed on the printed circuit board 7 and connected to a high frequency switch 18. The high-frequency switch 18 is, for example, a GaAs-MMI
C and mounted on the printed circuit board 7.

On the other hand, the meander element 15 is arranged so that its electric field direction is perpendicular to the human body or the metal plate 4 (Z direction). The electrical length of the meander element 15 is set to about a quarter wavelength (about 39 mm). A strip line 17 is connected to a feeding point of the meander element 15, and is connected to a high-frequency switch 18. The high-frequency switch 18 operates to select either the dipole element 13 or the meander element 15 and supply power to the wireless circuit unit 3. The printed circuit board 7 is disposed vertically inside the housing of the card-type wireless terminal 2 with respect to the human body or the metal plate 4.

Next, the operation of the card-type wireless terminal using the antenna structure of the present invention in the fifth embodiment of the present invention will be described with reference to FIG. In the card-type wireless terminal according to the present embodiment configured as described above,
The dipole element 13 and the meander element 15 operate as a diversity antenna system. Here, the radiation from the dipole element 13 is such that the direction of the electric field is
In the Y direction. The main radiation direction is XZ
It becomes a plane direction. On the other hand, the radiation from the meander element 15 is the Z direction whose electric field direction is perpendicular to the human body or the metal plate 4.
Direction.

Therefore, by selectively using either the dipole element 13 or the meander element 15, it is possible to operate as a polarization diversity antenna system with respect to both polarization components in the Y and Z directions. That is, in a free space that is not close to the human body or the metal plate 4, the above-described antenna system selects an optimum antenna for both the Y-direction and the Z-direction polarization components, and thus has practically high antenna performance.

On the other hand, when it comes close to the human body or the metal plate 4, the radiation efficiency of the dipole element 13 is deteriorated due to the electromagnetic field canceling action with the human body or the metal plate 4. However, since the direction of the electric field of the meander element 15 and the human body or the metal plate 4 are perpendicular to each other, the electromagnetic field canceling action does not occur. As a result, when approaching the human body or the metal plate 4, the meander element 15 is always selected, and the radiation efficiency of the entire antenna system can be increased.

Since the high-frequency switch 18 is mounted on the printed circuit board 7 and only one power supply cable is required, the configuration is simplified. As described above, one of the features of the card-type wireless terminal according to the present embodiment is as follows.
By configuring a diversity antenna using a dipole element and a meander element, antenna performance in free space can be improved.

Another feature of the card-type wireless terminal according to the present embodiment is that a diversity antenna composed of a dipole element arranged parallel to a human body or a metal plate 4 and a meander element arranged perpendicular to the human body or metal plate 4 is constructed. By
The point is that the antenna performance can be enhanced in a free space and in any state of being placed near the human body or the metal plate 4.

Another feature of the card-type wireless terminal according to the present embodiment is that a high-frequency switch for switching between a dipole element and a meander element is mounted on the same substrate, so that a card-type wireless terminal having a simple structure and high productivity can be obtained. A wireless terminal can be realized.

As is clear from the above description, the card-type wireless terminal according to the present embodiment can improve the antenna performance in any state of being placed in free space and near a human body or a metal plate, and has a simple structure. A highly productive card-type wireless terminal can be realized.

(Sixth Embodiment) First, the configuration of a card-type wireless terminal using the antenna structure of the present invention in the sixth embodiment of the present invention will be described with reference to FIG.
FIG. 6 is a perspective view showing the configuration of a card-type wireless terminal using the antenna structure of the present invention in the sixth embodiment. In FIG. 6, 19 is a slot antenna, 20, 2
Reference numeral 1 denotes a power supply cable. 1 to 5 are the same as those in FIGS. 1 to 5,
It works similarly.

In FIG. 6, the dipole element 13 and the balun 14 are formed by a copper foil pattern on the printed circuit board 7 and perform the same operation as in FIG. Slot antenna 19
Are arranged so that the direction of the electric field is parallel to the plane different from the dipole element 13 in the Z direction. Dipole element 13
And the slot antenna 19 is supplied with power to the wireless circuit unit 3 by feed cables 20 and 21, respectively.
Then, select one of them to connect to the transmission / reception circuit.

Next, the operation of a card-type wireless terminal using the antenna structure of the present invention in the sixth embodiment of the present invention will be described with reference to FIG. In the card-type wireless terminal configured as described above, dipole element 13 and slot antenna 19 operate as a diversity antenna system. Here, the radiation from the dipole element 13 has the electric field direction in the Y direction and the main radiation direction in the X direction.
This is in the Z plane direction. On the other hand, the radiation from the slot antenna 19 has the electric field direction in the Z direction and the main radiation direction in the YZ plane direction. Therefore, by selectively using either the dipole element 13 or the slot antenna 19, the antenna operates as a diversity antenna system in the polarization direction and the main radiation direction.

That is, in a free space that is not close to the human body or the metal plate 4, the above-mentioned antenna system selects an optimum antenna for the polarization and the direction, and therefore has practically high antenna performance. On the other hand, when approaching the human body or the metal plate 4, the radiation efficiency of the dipole element 13 is deteriorated due to the electromagnetic field canceling action with the human body or the metal plate 4. However, since the direction of the electric field of the slot antenna 19 and the human body or the metal plate 4 are perpendicular to each other, the electromagnetic field canceling action does not occur. As a result, when approaching the human body or the metal plate 4, the slot antenna 19 is always selected, and the radiation efficiency of the entire antenna system can be increased.

As described above, the feature of the card-type wireless terminal according to the present embodiment is that a diversity antenna in which a dipole element and a slot antenna are arranged on different surfaces makes it possible to form a free space and a human body or metal plate. The point is that the antenna performance can be improved in any state arranged in the vicinity. As is clear from the above description, the card-type wireless terminal according to the present embodiment can enhance the antenna performance regardless of whether the wireless terminal is placed in a free space or near a human body or a metal plate.

(Seventh Embodiment) First, a configuration of a card-type wireless terminal using an antenna structure of the present invention in a seventh embodiment of the present invention will be described with reference to FIG.
FIG. 7 is a side view showing the configuration of a card-type wireless terminal using the antenna structure of the present invention in the seventh embodiment. That is, FIG. 7 shows a view of the card-type wireless terminal 2 shown in FIG. 1 viewed from the Y direction. In FIG. 7, 2
2 is a circuit board, 23 is a shield case, 24 is a housing,
Reference numeral 5 denotes a mounting terminal. 1 to 6 are the same as those in FIGS. 1 to 6,
It works similarly. In addition, for example, on the printed circuit board 7,
A slot antenna 1 is configured, and its operation is the same as that shown in FIG.

The circuit board 22 is a main board on which the circuit of the card-type wireless terminal 2 is mounted. In particular, the wireless circuit section is covered with a shield case 23. The circuit board 22, the shield case 23, and the printed board 7 are housed in a housing 24. Here, the printed circuit board 7 is fixed by the mounting terminals 25 so as to be perpendicular to the circuit board 22. The mounting terminal 25 also has a function of electrically supplying power from an antenna (for example, a slot antenna) on the printed circuit board 7 to the circuit board 22.

Next, the operation of a card-type wireless terminal using the antenna structure of the present invention in the seventh embodiment of the present invention will be described with reference to FIG. In the card-type wireless terminal configured as described above, the printed circuit board 7 can be treated as one of the components mounted on the circuit board 22, and the printed circuit board 7 and the circuit board with the shield case 23 mounted thereon The card type wireless terminal 2 is completed by incorporating 22 into the housing 24.

Thus, the number of feed lines from the antenna to the circuit board 22 can be reduced, and the antenna can be fixed perpendicular to the circuit board 22. Further, the antenna performance described in FIG. 1 can be secured.

As described above, the feature of the card-type wireless terminal according to the present embodiment is that the feeder line can be reduced by vertically fixing the printed circuit board on which the antenna is formed on the circuit board by the mounting terminal. In both cases, the assembling process can be simplified.

As is clear from the above description, according to the card-type wireless terminal of the present embodiment, the antenna performance can be improved when placed near a human body or a metal plate. A wireless terminal can be realized.

(Eighth Embodiment) First, the configuration of a card type radio terminal using an antenna structure of the present invention in an eighth embodiment of the present invention will be described with reference to FIG.
FIG. 8 is a side view showing the configuration of a card-type wireless terminal using the antenna structure of the present invention in the eighth embodiment. That is, FIG. 8 shows a view of the card-type wireless terminal 2 viewed from the Y direction. In FIG. 8, 26 indicates a power supply cable, and 27 indicates a rib. The printed circuit board 7 is a housing 24
The power supply cable 26 supplies power from the antenna on the printed circuit board 7 to the circuit board 22. 1 to 7 are the same as those in FIGS. 1 to 7 and operate similarly. The printed circuit board 7 is provided with, for example, the slot antenna 1, and its operation is the same as that of FIG. 1, and other components are the same as those of FIG.

Next, the operation of the card type radio terminal using the antenna structure of the present invention in the eighth embodiment of the present invention will be described with reference to FIG. In the card-type wireless terminal configured as described above, since the printed circuit board 7 is fixed to the housing 24, the distance from the housing 24 can be kept constant. Further, the printed circuit board 7 is previously mounted on the housing 2.
4 and the circuit board 22 with the shield case 23 mounted thereon is incorporated into the housing 24 to complete the card type wireless terminal 2.

Thus, although a power supply cable from the antenna to the circuit board 22 is required, it is easy to replace the antenna in a process different from that for the circuit board 22, which is advantageous in terms of production and maintenance. In addition, as in the case of the embodiment in FIG. 1, antenna performance can be ensured.

As described above, the feature of the card-type wireless terminal according to the present embodiment is that it is advantageous in terms of production and maintenance by vertically fixing a printed circuit board having an antenna to a housing. It is a point. As is apparent from the above description, according to the card-type wireless terminal of the present embodiment, the antenna performance can be improved when the card-type wireless terminal is arranged near the human body or the metal plate, and a card having a simple structure and high productivity can be obtained. Type wireless terminal can be realized.

(Ninth Embodiment) First, the configuration of a card-type wireless terminal using an antenna structure of the present invention in a ninth embodiment of the present invention will be described with reference to FIG.
FIG. 9 is a side view showing the configuration of a card-type wireless terminal using the antenna structure of the present invention in the ninth embodiment. That is, FIG. 9 shows a diagram of the card-type wireless terminal 2 viewed from the Y direction. In FIG. 9, reference numeral 28 denotes an antenna pattern. The antenna pattern 28 constitutes, for example, the slot antenna 1 (FIG. 1) by a conductor pattern printed or deposited on the inner surface of the housing 24. The power supply cable 26 is connected to a power supply point of the antenna pattern 28 and supplies power to the circuit board 22. 1 to 8 are the same as those in FIGS. 1 to 8 and operate similarly. The electrical operation of the antenna pattern 28 is the same as that of FIG. 1, and the other components are the same as those of FIG.

Next, the operation of the card type radio terminal using the antenna structure of the present invention in the ninth embodiment of the present invention will be described with reference to FIG. In the card-type wireless terminal configured as described above, the antenna pattern 28
Are integrally formed on the housing 24, the housing 2
The card-type wireless terminal 2 can be completed by attaching the circuit board 22 to the power supply cable 4 and connecting a power supply cable.
Therefore, it is possible to reduce the number of parts and the number of manufacturing steps. Further, since the distance between the antenna and the shield case 23 can be maximized, higher antenna performance can be ensured as described in FIG.

As described above, the feature of the card-type wireless terminal according to the present embodiment is that higher antenna performance is ensured by forming the antenna with a conductor pattern printed or deposited on the inner surface of the housing. The number of parts and the number of manufacturing steps can be reduced while the number of parts is reduced.

As is clear from the above description, according to the card-type wireless terminal of the present embodiment, the antenna performance can be enhanced when the wireless terminal is placed near a human body or a metal plate, and the productivity can be improved with a simple structure. Card-type wireless terminal with high cost.

(Tenth Embodiment) First, the configuration of a card-type wireless terminal using an antenna structure of the present invention in a tenth embodiment of the present invention will be described with reference to FIG. FIG. 10 is a side view showing the configuration of a card-type wireless terminal using the antenna structure of the present invention in the tenth embodiment. That is, FIG. 10 shows a view of the card-type wireless terminal 2 viewed from the Y direction. In FIG.
Reference numeral 29 denotes a contact terminal. The contact terminal 29 is mounted on the circuit board 22 and is assembled so as to contact a feeding point of the antenna pattern 28. Other components are the same as those shown in FIG. 1 to 9 are the same as those in FIGS. 1 to 9 and operate similarly.

Next, referring to FIG. 10, a tenth embodiment of the present invention will be described.
The operation of the card-type wireless terminal using the antenna structure of the present invention in the embodiment will be described. In the card-type wireless terminal configured as described above, power is supplied from the circuit board 22 to the antenna by the contact terminal 29. Therefore, the card-type wireless terminal 2 is completed simply by attaching the circuit board 22 to the housing 24, and the number of power supply cables can be reduced. Thereby, the number of parts can be reduced and the number of manufacturing steps can be reduced. Further, the antenna performance can be ensured in the same manner as described with reference to FIG. Further, the same effect can be obtained by mounting the contact terminals 29 on a printed circuit board on which the antenna is mounted and making contact with the power supply section on the circuit board 22.

As described above, the feature of the card-type wireless terminal according to the present embodiment is that the power is supplied by the contact terminals mounted on the circuit board or the printed circuit board on the antenna side, whereby the number of parts and the manufacturing process are reduced. Is a point that can be reduced. As is apparent from the above description, according to the card-type wireless terminal of the present embodiment, the antenna performance can be enhanced when the card-type wireless terminal is arranged near the human body or the metal plate, and a card having a simple structure and high productivity can be obtained. Type wireless terminal can be realized.

(Eleventh Embodiment) First, the configuration of a card-type wireless terminal using the antenna structure of the present invention in the eleventh embodiment of the present invention will be described with reference to FIG. FIG. 11 is a side view showing the configuration of a card-type wireless terminal using the antenna structure of the present invention in the eleventh embodiment. That is, FIG. 11 shows a diagram of the card-type wireless terminal 2 viewed from the Y direction. In FIG.
Reference numeral 30 denotes a contact terminal, and 31 denotes a circuit component. Contact terminal 30
Is mounted on the printed circuit board 7 and is assembled so as to be in contact with the power supply section of the circuit board 22. Circuit component 3
Reference numeral 1 denotes a chip component mounted on the back surface (circuit side) of the printed circuit board 7, which constitutes a matching circuit of an antenna formed on the printed circuit board 7. Other components are the same as those shown in FIG. 1 to 10 are the same as those in FIGS. 1 to 10 and operate in the same manner.

Next, referring to FIG. 11, an eleventh embodiment of the present invention will be described.
The operation of the card-type wireless terminal using the antenna structure of the present invention in the embodiment will be described. In the card-type wireless terminal configured as described above, since the circuit components 31 constituting the matching circuit are mounted on the back surface of the printed circuit board 7, the printed circuit board 7 may be in close contact with the inner surface of the housing 24. it can. Therefore, since the distance between the antenna and the shield case 23 can be maximized, the antenna performance described with reference to FIG. 1 can be further secured. Further, since the matching circuit can be handled as a component mounted on the printed circuit board 7, it is advantageous in terms of production and maintenance.

As described above, the feature of the card-type wireless terminal according to the present embodiment is that the matching circuit is mounted on the back side of the printed circuit board on which the antenna is formed, so that higher antenna performance can be ensured. It is possible.
As is apparent from the above description, according to the card-type wireless terminal of the present embodiment, the antenna performance can be improved when the card-type wireless terminal is arranged near the human body or the metal plate, and a card having a simple structure and high productivity can be obtained. Type wireless terminal can be realized.

(Twelfth Embodiment) First, a configuration of a card-type wireless terminal using an antenna structure of the present invention in a twelfth embodiment of the present invention will be described with reference to FIG. FIG. 12 is a side view showing the configuration of a card-type wireless terminal using the antenna structure of the present invention in the twelfth embodiment. That is, FIG. 12 shows a view of the card-type wireless terminal 2 viewed from the Y direction. In FIG.
32 is a projection, and 33 is a display surface. The protrusion 32 is a protrusion of the housing 24 and is provided near the printed circuit board 7. The display surface 33 is a display unit such as a liquid crystal display panel, and displays various information of the card type wireless terminal 2. Other components are the same as those shown in FIG. 1 to 1
1 are the same as those in FIGS. 1 to 11 and operate similarly.

Next, referring to FIG. 12, a twelfth embodiment of the present invention will be described.
The operation of the card-type wireless terminal using the antenna structure of the present invention in the embodiment will be described. In the card-type wireless terminal configured as described above, the distance between the antenna configured on the printed circuit board 7 and the human body or the metal plate 4 is:
It is an important parameter that determines the radiation efficiency of the entire antenna system. In general, as the distance between the antenna and the human body or the metal plate is larger, the mutual coupling between the human body or the metal plate 4 is reduced, and the radiation efficiency is improved.

Here, for example, when 4 is a metal desk, the state in which the card type wireless terminal 2 is used is generally the arrangement shown in FIG. At this time, if the projections 32 are provided on the housing 24, the distance between the antenna and the human body or the metal plate can be made as large as possible. Further, by arranging the protruding portion 32 only in the vicinity of the printed circuit board 7, the thickness of the housing 24 can be reduced in design.

For example, when 4 is a human body, the surface where the card type wireless terminal 2 is in close contact with the human body is not necessarily the one shown in FIG.
And the display surface 33 may be in close contact with the human body. In this case, for example, the printed circuit board 7
If the projections 32 are also provided on the nearby display surface side, the distance between the antenna and the human body or the metal plate can be increased regardless of which surface is in close contact.

As described above, the feature of the card-type wireless terminal according to the present embodiment is that by providing a projection near the antenna of the housing, the distance between the antenna and the human body or the metal plate is increased, and the antenna performance is improved. Is higher. As is apparent from the above description, according to the card-type wireless terminal of the present embodiment, antenna performance can be enhanced when the wireless terminal is placed near a human body or a metal plate.

(Thirteenth Embodiment) First, the configuration of a card-type wireless terminal using an antenna structure of the present invention in a thirteenth embodiment of the present invention will be described with reference to FIG. FIG. 13 is a side view showing the configuration of a card-type wireless terminal using the antenna structure of the present invention in the thirteenth embodiment. That is, FIG. 13 shows a view of the card-type wireless terminal 2 viewed from the Y direction. In FIG.
Reference numeral 35 denotes a bending portion, and 36 denotes an operation switch. Curved part 35
Is provided on the curved shape of the housing 24 and on a surface parallel to the printed circuit board 7 near the printed circuit board 7. The operation switch 36 is a switch that is manually operated by the user, and is arranged at a position as far as possible from the printed circuit board 7 of the housing 24. 1 to 12 are denoted by the same reference numerals as those in FIGS.
2 and operate similarly.

Next, referring to FIG. 13, a thirteenth embodiment of the present invention will be described.
The operation of the card-type wireless terminal using the antenna structure of the present invention in the embodiment will be described. In the card-type wireless terminal configured as described above, the mutual coupling between the human body or the metal plate is reduced as the distance between the antenna formed on the printed circuit board 7 and the human body or the metal plate 4 (FIG. 1) is increased. Radiation efficiency is improved. Therefore, in the present embodiment, the curved portion 35 is provided on the surface of the housing parallel to the printed circuit board 7.
Was provided. For this reason, for example, it is difficult to place this surface of the housing in close contact with a metal plate such as a table because the card type wireless terminal 2 is not stable. Further, if a human body or a metal plate or the like is close to a plane parallel to the printed circuit board 7, the distance between the human body or the like and the antenna can be increased by the protrusion dimension of the curved portion 35. Are reduced and radiation efficiency is improved.

When the operation switch of the card-type wireless terminal 2 is operated by hand, if the hand is close to the printed circuit board 7, the antenna performance deteriorates due to mutual coupling between the antenna and the hand. In this embodiment, since the operation switch 36 is disposed on the opposite side of the housing as far away from the printed circuit board 7 as possible, it is possible to reduce deterioration of antenna performance during operation.

As described above, one of the features of the card-type wireless terminal of this embodiment is that the surface of the housing parallel to the antenna is curved so that the close contact between the antenna surface and the metal plate is achieved. In other words, even if the antennas are in close contact with each other, the antenna performance can be increased by increasing the distance between the antenna and the antenna.

Another feature of the card-type wireless terminal according to the present embodiment is that the operation switch is arranged at a position as far away from the antenna of the housing as possible, so that deterioration of antenna performance during operation can be reduced. It is possible. As is clear from the above description, according to the card-type wireless terminal of the present embodiment, antenna performance can be enhanced when the wireless terminal is placed near a human body or a metal plate or during operation.

[0113]

The present invention is constructed as described above, and in particular, by arranging the direction of the electric field of the slot antenna perpendicularly to the human body or the metal plate, the housing shape of the card type wireless terminal can be made more efficient. When used well, an antenna structure with high antenna performance can be obtained when it is placed near a human body or a metal plate.

The present invention is configured as described above. In particular, by arranging the electric field direction of the meander line antenna perpendicular to the human body or the metal plate, the housing of the card-type wireless terminal can be efficiently formed. By utilizing the antenna structure, an antenna structure having high antenna performance can be obtained when the antenna structure is arranged near a human body or a metal plate.

The present invention is constructed as described above. In particular, by arranging the electric field direction of the normal mode helical antenna perpendicular to the human body or the metal plate, the shape of the housing of the card-type wireless terminal can be improved. When used well, an antenna structure with high antenna performance can be obtained when it is placed near a human body or a metal plate.

According to the present invention, the meander line antenna whose electric field direction is perpendicular to the tip of the dipole antenna whose electric field direction is parallel to the housing surface is connected to the free-space, Also, in any state of being placed near the human body or the metal plate, an antenna structure with high radiation efficiency of the entire antenna system can be obtained.

The present invention is configured as described above,
By placing the dipole elements of the book close to both sides of the card-type wireless terminal and connecting the vertical meander element to the tip of the dipole element, the free space and the human body or the metal plate are brought closer to either side of the card-type wireless terminal. In this case, an antenna structure with high radiation efficiency of the entire antenna system can be obtained.

The present invention is configured as described above. In particular, by connecting a vertical meander element to the end of the loop element, the antenna performance can be improved in any state where the free space and the human body or the metal plate are in close proximity. An antenna structure is obtained.

The present invention is constructed as described above, and in particular, by connecting two vertical meander elements to the end of the loop element so as to be directed toward the opposing casing surfaces, the free space and the human body or metal An antenna structure with high radiation efficiency of the entire antenna system can be obtained in any state where the plates are close to each other and when the human body or the metal plate is close to either surface of the card-type wireless terminal.

The present invention is configured as described above. In particular, by arranging two antennas having different electric field directions on different housing surfaces, the antenna performance is improved when the antenna is arranged near a human body or a metal plate. Can be
A card-type wireless terminal with high productivity can be obtained with a simple structure.

According to the present invention, the printed circuit board having the above-described structure, in particular, the antenna, is fixed vertically to the circuit board by mounting terminals.
With a simple structure, the number of power supply lines can be reduced, the assembly process can be simplified, and a highly productive card-type wireless terminal can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a card-type wireless terminal incorporating an antenna structure according to a first embodiment of the present invention;

FIG. 2 is a perspective view showing a configuration of a card-type wireless terminal incorporating an antenna structure according to a second embodiment of the present invention;

FIG. 3 is a perspective view showing a configuration of a card-type wireless terminal incorporating an antenna structure according to a third embodiment of the present invention;

FIG. 4 is a perspective view showing a configuration of a card-type wireless terminal incorporating an antenna structure according to a fourth embodiment of the present invention;

FIG. 5 is a perspective view and a partially enlarged view showing a configuration of a card-type wireless terminal using an antenna structure of the present invention in a fifth embodiment of the present invention;

FIG. 6 is a perspective view showing a configuration of a card-type wireless terminal using an antenna structure of the present invention in a sixth embodiment of the present invention;

FIG. 7 is a side view showing a configuration of a card-type wireless terminal using an antenna structure of the present invention in a seventh embodiment of the present invention;

FIG. 8 is a side view showing a configuration of a card-type wireless terminal using an antenna structure of the present invention in an eighth embodiment of the present invention;

FIG. 9 is a side view showing a configuration of a card-type wireless terminal using an antenna structure of the present invention in a ninth embodiment of the present invention;

FIG. 10 is a side view showing a configuration of a card-type wireless terminal using the antenna structure of the present invention according to the tenth embodiment of the present invention;

FIG. 11 is a side view showing the configuration of a card-type wireless terminal using the antenna structure of the present invention according to the eleventh embodiment of the present invention;

FIG. 12 is a side view showing a configuration of a card-type wireless terminal using the antenna structure of the present invention in the twelfth embodiment of the present invention;

FIG. 13 is a side view showing the configuration of a card-type wireless terminal using the antenna structure of the present invention in the thirteenth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slot antenna 2 Card type radio terminal 3 Radio circuit part 4 Human body or metal plate 5 Electric field direction 6 Meander line antenna 7 Printed circuit board 8, 9 Dipole element 10, 11 Meander element 12 Loop element 13 Dipole element 14 Balun 15 Meander element 16, REFERENCE SIGNS LIST 17 stripline 18 high-frequency switch 19 slot antenna 20, 21 power supply cable 22 circuit board 23 shield case 24 housing 25 mounting terminal 26 power supply cable 27 rib 28 antenna pattern 29 contact terminal 30 contact terminal 31 circuit component 32 protrusion 33 display surface 35 Bending part 36 Operation switch

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01Q 13/10 H01Q 13/10 F term (Reference) 5J045 AA05 AA21 AB06 DA03 LA01 NA03 5J046 AA03 AA04 AA09 AB06 AB07 AB08 AB10 AB11 PA04 PA07 5J047 AA03 AA04 AA09 AB06 AB07 AB08 AB10 AB11 FC06 FD01

Claims (9)

[Claims] 1. An antenna structure incorporated in a card-type wireless terminal, wherein a slot antenna is arranged so that its electric field direction is perpendicular to a housing surface having a maximum area. 2. An antenna structure incorporated in a card-type wireless terminal, wherein a meander line antenna is arranged so that its electric field direction is perpendicular to a housing surface having a maximum area. 3. An antenna structure incorporated in a card-type wireless terminal, wherein a normal mode helical antenna is arranged so that its electric field direction is perpendicular to a housing surface having a maximum area. . 4. A structure of an antenna built in a card-type wireless terminal, wherein the direction of the electric field is at the tip of a dipole antenna whose electric field direction is parallel to the housing surface having the largest area. An antenna structure characterized by connecting a vertical meander line antenna. 5. A first element of the dipole antenna is close to a first housing surface having a maximum area, and a second element of the dipole antenna is close to a second housing surface facing the first housing surface. Then, a first meander element is connected to the tip of the first element of the dipole antenna such that the tip faces the second housing surface, and a second meander element is connected to the tip of the second element of the dipole antenna. The antenna structure according to claim 4, wherein the antenna structure is connected such that a front end thereof faces the first housing surface. 6. A structure of an antenna built in a card-type wireless terminal, wherein a part of a loop antenna whose electric field direction is parallel to a casing surface having a maximum area is provided in a part of the loop antenna with respect to the casing surface. An antenna structure characterized by connecting a meander line antenna that is vertical. 7. A first meander element is connected to a part of the loop antenna such that a tip of the first meander element faces a first housing surface having a maximum area, and a second meander element is connected to another part of the loop antenna. 7. The antenna structure according to claim 6, wherein the element is connected such that a tip thereof is directed to a second housing surface facing the first housing surface. 8. A first antenna is disposed on a first housing surface having a maximum area, and a second antenna is disposed on a second housing surface different from the first housing surface. Claims 1, 2, 3, 4, 5, and at least one of the second antennas
A card-type wireless terminal having the antenna structure described in 6 or 7. 9. An antenna having the antenna structure of claim 1, 2, 3, 4, 5, 6, or 7, comprising a pattern on a printed circuit board, wherein the printed circuit board is mounted on a circuit board of a card-type wireless terminal. A card-type wireless terminal that is mounted vertically.