JP2001345620A - Mobile telephone antenna device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve various problems about a trunk pole antenna and a printed glass antenna. SOLUTION: A mobile telephone antenna device 11 has an integral structure composed of a telephone antenna 12 and a radio transmitter/receiver 13. The telephone antenna 12 is equipped with a transmission/reception antenna element 15 whose feed point 25 is directly connected to the telephone RF input/output point 26 of the radio transmitter/receiver 13, and a receive-only antenna element 17 whose feed point 27 is directly connected to the telephone RF input point 28 of the radio transmitter/receiver 13. A feeder connected between the telephone antenna 12 and the radio transmitter/receiver 13 can be dispensed with, so that various problems caused by the feeder can be solved when a trunk pole antenna and a printed glass antenna are used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device for an automobile telephone mounted on an automobile.

[0002]

2. Description of the Related Art Conventionally, a trunk pole antenna as shown in FIG. 6 has been provided as an antenna for a mobile telephone mounted on an automobile. In FIG. 6, a trunk pole antenna 1 is attached to a trunk 3 of an automobile 2 and is connected to, for example, a radio device 4 installed in the trunk 3 through a feeder line 5. The wireless device 4 is connected to a controller (communication device) 7 installed in the passenger compartment 6 through a signal line 8.

In this case, the trunk pole antenna 1 is
Since it is installed outside the cabin 6 of the automobile 2, there is an advantage that it is hardly affected by the body (metal body),
Further, since an antenna element of an ideal dipole antenna system is used as the antenna, there is an advantage that the antenna performance is relatively excellent.

[0004] However, the trunk pole antenna 1
Since the antenna is mounted outside the cabin 6 of the automobile 2, it is necessary to secure the strength of the antenna itself, and it is necessary to increase the waterproof performance. Further, a dedicated rigid bracket for mounting to the trunk 3 is required. Thus, there is a problem that the cost is relatively high. In addition, there is also a problem that the aesthetic appearance of the automobile 2 is impaired, and a problem that wind noise is generated during traveling. In addition, there is a problem that the vehicle is stolen or damaged by mischief. Further, for example, when performing automatic car washing at a gas station or the like, there is a problem that it is necessary to detach and attach the car every time.

On the other hand, a glass printed antenna as shown in FIG. 7 is provided as another antenna for an automobile telephone mounted on an automobile. In FIG. 7, a glass printed antenna 9 is a rear window glass 10 of the automobile 2.
In the same manner as the above-described trunk pole antenna 1, it is connected to a wireless device 4 through a feed line 5.

In this case, the glass printed antenna 9 is
Since it is buried in the rear window glass 10, that is, unlike the trunk pole antenna 1, it is not mounted outside the cabin 6 of the automobile 2, the above-described various problems in the trunk pole antenna 1 are solved. There is an advantage that can be.

However, the glass printed antenna 9
Is buried in the rear window glass 10, it cannot be denied that the antenna performance is inferior to the above-described trunk pole antenna 1. In an area where the radio wave environment such as a weak electric field area is relatively poor, the communication line There is a problem that communication quality is deteriorated, for example, establishment is impossible or voice is interrupted. Further, since the antenna performance is affected by the shape of the window frame and the window glass and the surrounding environment, it is necessary to adjust the antenna element for each vehicle type, and there is a problem that the number of development steps increases.

The following problems are common to both the trunk pole antenna 1 and the glass printed antenna 9. That is, since the trunk pole antenna 1 and the glass print antenna 9 are connected to the wireless device 4 through the feeder line 5, the feeder line 5 and the feeder connector (not shown) are additionally provided. In addition, it is necessary to prepare a clamp for fixing the power supply line 5, and the power supply line 5 and the power supply connector are relatively expensive. . In addition, there is a problem that it is necessary to perform the work of examining the wiring of the power supply line 5 and the work of laying the power supply line 5. Further, due to the occurrence of transmission loss in the feed line 5,
There is also a problem that antenna performance is reduced.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an antenna apparatus for a mobile telephone which can solve various problems in a trunk pole antenna and a glass printed antenna. is there.

[0010]

According to the antenna device for a mobile telephone, the antenna for the telephone and the radio means are integrated, and the feeding point of the antenna element of the antenna for the telephone and the telephone for the radio means are provided. Unlike the conventional trunk pole antenna and the glass print antenna, it is configured to connect directly to the RF input / output point for
Feed lines for connecting between the telephone antenna and the wireless means can be dispensed with, so that various types of feed lines that may occur due to the feed lines when using a trunk pole antenna and a glass printed antenna are used. Problem can be solved. In addition, by installing the antenna in a place where the radio wave environment is good and in the interior of the car, it is possible to solve the problems inherent in the trunk pole antenna. Can be solved.

According to the antenna device for a car telephone according to the second aspect, the GPS antenna, the amplifying means and the wireless means are integrated, and the amplifying means and the GPS RF input / output points of the wireless means are directly connected. In addition to the need for a feed line for connecting between the telephone antenna and the wireless means, no feed line for connecting between the amplifying means and the wireless means is required. Accordingly, the present invention can be applied to a configuration having a GPS antenna function, and can be applied to, for example, an emergency call system or a distribution management system using GPS.

According to the third aspect of the present invention, since the antenna device for a mobile phone can be installed on the rear tray or the instrument panel in the vehicle interior, it is possible to install the antenna device in the vehicle interior where the radio wave environment is most excellent. By installing the antenna on the rear tray or the instrument panel, the antenna performance can be improved accordingly.

(First Embodiment) A first embodiment of the present invention will be described below with reference to FIGS. First, FIG. 1 shows an external perspective view of an antenna device for a mobile phone. In FIG. 1, an antenna device 11 for a mobile phone is configured by integrating a telephone antenna 12 and a wireless device 13 (wireless means in the present invention).

First, the telephone antenna 12 will be described. In the telephone antenna 12, the telephone ground plate 14 is screwed and fixed over substantially the entire upper surface of the wireless device 13. Ground plate for telephone 14
On one end side, a transmitting / receiving antenna element 15 that constitutes a well-known inverted F antenna having a relatively low overall height including a radiation plate 15a, a short-circuit plate 15b, and a feed plate 15c is provided upright. The radiating plate 15a is formed with a cutout for securing a frequency band of a radio wave that can be radiated and captured. Further, between the lower end of the power supply plate 15c and the telephone ground plate 14, both are provided. A column-shaped resin 16 is interposed to secure insulation therebetween.

On the other hand, on the other end side of the telephone ground plate 14, a reception-only antenna constituting a well-known inverted F antenna having a relatively low overall height including a radiation plate 17a, a short-circuit plate 17b and a feed plate 17c. An element 17 is provided upright. The radiating plate 17a is formed with a cutout for securing a frequency band of a radio wave that can be captured in the same manner as the radiating plate 15a, and a lower end of the power supply plate 17c and a ground plate for telephone. A cylindrical resin 18 for securing insulation between the two is interposed between the resin 18 and the resin 14.

A distance of about 0.3λ (λ indicates the wavelength of a radio wave) is secured between the transmitting / receiving antenna element 15 and the receiving-only antenna element 17, so that diversity reception can be performed satisfactorily. It is configured to be able to do so.

Next, the wireless device 13 will be described. The wireless device 13 has a flat rectangular parallelepiped shape, and has a circuit board (not shown) on which electronic components (not shown) for performing wireless processing are mounted. Radio 1
One end of a power supply line 19 for supplying drive power to the wireless device 13 is connected to one side surface portion 13a of the vehicle 3, and the other end of the power supply line 19 is connected to an automobile 20 (see FIG. 2). It is connected to a mounted battery (not shown). A female 16-core connector 21 is embedded in one side surface 13 a of the wireless device 13, and the female 16-core connector 21 has a connector cover 23 at one end of the signal line 22.
A male 16-core connector 24 embedded in the connector is mounted.

Here, between the feeding point 25 formed by the lower end of the feeding plate 15c in the transmitting / receiving antenna element 15 and the RF input / output point 26 for the telephone on the side of the radio device 13, both Are electrically connected directly to each other, and a feed point 27 and a wireless device 1 in the antenna element 17 for reception only, which is formed by a lower end portion of the feed plate 17c.
Both are also directly electrically connected to the telephone RF input point 28 on the third side.

A cover 29 made of resin is screwed and attached to the radio device 13 so as to cover the ground plate 14, the transmission / reception antenna element 15 and the reception-only antenna element 17 in the telephone antenna 12. Have been.

As shown in FIG. 2, the antenna device 11 for a mobile telephone constructed as described above is installed on a rear tray 31 in a passenger compartment 30 of an automobile 20, and
For example, it is connected through a signal line 22 to a controller (communication device) 32 installed inside or around the console box. Note that, in this case, the antenna device 11 for a mobile phone is not limited to being installed on the rear tray 31 and can be installed on an instrument panel (not shown) in the vehicle interior 30. Has become.

Here, the inventors have proposed a conventional trunk pole antenna, a conventional glass printed antenna, an antenna device 11 for a mobile phone according to the present embodiment, and a telephone antenna 12 according to the present embodiment when a feeder line is used. The antenna performance was evaluated. FIG. 3 shows the evaluation results. The evaluation uses the 800 MHz frequency band,
Using a 2.5 meter long feeder and mounting the antenna or antenna device on the car,
Rotate by 60 degrees and in the horizontal plane at that time (direction of elevation angle 0 degree)
The average gain of the antenna was measured, and the higher the average gain, the better the antenna performance.

As is apparent from FIG. 3, the antenna performance of the antenna device 11 for a mobile phone according to the present embodiment is "-1 dB" as compared with the conventional trunk pole antenna and "+5 dB" as compared with the conventional glass printed antenna. . Here, the conventional trunk pole antenna ratio "-1d
B, the difference due to the installation location of the antenna is the conventional trunk pole antenna ratio “−2 dB”, the difference due to the radiation efficiency of the antenna itself is the conventional trunk pole antenna ratio “−1 dB”, and the transmission loss of the feed line Is dependent on the conventional trunk pole antenna ratio of “+2 dB”. In addition, a frequency band of 1500 MHz, 2
In the case of the frequency band of 000 MHz, the transmission loss of the feed line becomes large, and accordingly, the antenna performance of the antenna device 11 for a mobile phone according to the present embodiment is improved.

As described above, according to the first embodiment, the telephone antenna 12 and the radio device 13 are integrated,
The feeding point 25 of the transmitting / receiving antenna element 15 in the telephone antenna 12 and the R
F input / output point 26 is directly connected, and feed point 27 of reception-only antenna element 17 is directly connected to RF input point 28 for telephone on radio 13 side. Unlike the antenna and the glass-printed antenna, the feed line for connecting between the telephone antenna 12 and the radio 13 can be eliminated, thereby using the trunk pole antenna and the glass-printed antenna. Various problems that may occur due to the feeder in such a case can be solved.
In addition, by installing the antenna in the compartment 30 of the automobile 19 and in a place where the radio wave environment is good, it is possible to solve a problem peculiar to the trunk pole antenna. Problem can be solved.

Also, since it can be installed on the rear tray 31 in the vehicle compartment 30 or on the instrument panel, it can be installed on the rear tray 31 in the vehicle compartment 30 which is one of the places where the radio wave environment is most excellent. By installing the antenna on the instrument panel, the antenna performance can be improved accordingly.

Further, since a well-known inverted-F antenna having a relatively low overall height is employed as the transmitting / receiving antenna element 15 and the receiving-only antenna element 17, even when the antenna element is installed on the rear tray 31 in the passenger compartment 30, Since the overall height is relatively low, the rear view can be favorably secured.

(Second Embodiment) Next, a second embodiment of the present invention will be described.
An embodiment will be described with reference to FIGS.
The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Hereinafter, different parts will be described.
In the second embodiment, a GPS antenna function is added to the antenna device 11 for a mobile phone described in the first embodiment. That is, in FIG. 4, the antenna device 41 for a mobile phone includes a telephone antenna 42,
The antenna 43 for GPS, the amplifier 44 (amplifying means in the present invention), and the wireless device 45 are integrally formed, and the antenna device 11 for the mobile phone described in the first embodiment is correspondingly formed. By comparison, the overall longitudinal dimension is configured to be large.

First, the telephone antenna 42 will be described. In the telephone antenna 42, the transmitting / receiving antenna element 15 described in the first embodiment is provided between the lower end of the power supply plate 15c and the telephone ground plate 46 at one end of the telephone ground plate 46. The telephone-shaped ground plate 4 is erected with a cylindrical resin 16 interposed therebetween.
6, a reception-only antenna element 17 described in the first embodiment is erected with a columnar resin 18 interposed between a lower end of a feed plate 17c and a telephone ground plate 46. Have been. Also in this case, a distance of about 0.3λ (λ indicates the wavelength of a radio wave) is ensured between the antenna element 15 for both transmission and reception and the antenna element 17 for both reception and good diversity reception. It is configured to be possible.

A rising portion 46a is formed on the other end of the telephone ground plate 46.
A flat insulating resin 47 is interposed on the upper surface of
A ground plate 48 for PS is provided. And G
A GPS antenna 43 composed of a well-known patch antenna is disposed on the upper surface of the PS ground plate 48, and a GPS antenna 43 is provided between the lower surface of the rising portion 46 a and the upper surface of the wireless device 45. An amplifier 44 connected to an antenna 43 is provided.

Next, the radio 45 will be described. The wireless device 45 has a flat rectangular parallelepiped shape in the same manner as the wireless device 13 described in the first embodiment, and has mounted therein an electronic component (not shown) for performing wireless processing. A circuit board (not shown) is provided. Also, the radio 45
The power line 1 described in the first embodiment is provided on one side surface portion 45a.
9 is connected, and a female 16-core connector 21 is embedded therein. The female 16-core connector 21 has a male connector embedded in the connector cover 50 at one end of the signal line 49. A 16-core connector 51 of a mold is mounted.

In this case as well, between the feeding point 25 formed by the lower end portion of the feeding plate 15c in the transmitting / receiving antenna element 15 and the RF input / output point 26 of the wireless device 13, both are electrically connected. And the feeder plate 17c in the antenna element 17 for reception only.
Both are electrically connected directly between a power supply point 27 formed by the lower end of the wireless device 13 and an RF input / output point 28 on the wireless device 13 side. And here, the amplifier 44 and the radio 45
Both are also directly electrically connected to the GPS RF input / output point 52 on the side.

The cover 53 made of resin is provided on the antenna 42 for the telephone, the ground plate 46, the antenna element 15 for both transmission and reception, the antenna element 17 for reception only, the antenna 43 for GPS, and the amplifier 4
4 is attached to the radio device 45 by screws so as to cover the radio device 4.

As shown in FIG. 4, the antenna device 41 for a mobile telephone constructed as described above is installed in the vehicle compartment 30 of the automobile 20 in the same manner as the antenna device 11 for a mobile telephone described in the first embodiment. And a controller (communication device) 32 and G installed in the rear tray 31 and in the vehicle compartment 30 and installed in or around the console box, for example.
A PS controller (communication device) 54 is connected via a signal line 49.

As described above, according to the second embodiment, the GPS antenna 43, the amplifier 44, and the radio 45
And the amplifier R and the radio 45 for GPS
Since it is configured to connect directly to the F input / output point 52,
In addition to eliminating the need for a feed line for connecting between the telephone antenna 42 and the wireless device 45, the need for a feed line for connecting between the amplifier 44 and the wireless device 45 is eliminated. Accordingly, it is possible to cope with a configuration having a GPS antenna function, and it can be applied to, for example, an emergency call system or a distribution management system using GPS.

(Other Embodiments) The present invention is not limited to the above embodiment, but can be modified or expanded as follows. The shape of the inverted F antenna is
If it is possible to obtain the desired antenna performance,
Other shapes may be used.

A feeder is connected to a side portion of the radio device on the side of the transmitting / receiving antenna element, and a female
The first embodiment is not limited to the configuration in which the six-core connector is embedded. In the first embodiment, the feeder is connected to the side surface of the radio device on the side of the receiving-only antenna element, and the female 16-core connector is embedded. And the second configuration
In the embodiment, a feed line may be connected to the side surface on the GPS antenna side, and a female 16-core connector may be embedded.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a state where the vehicle is mounted on a vehicle.

FIG. 3 is a diagram showing evaluation results.

FIG. 4 is an external perspective view showing a second embodiment of the present invention.

FIG. 5 is a diagram corresponding to FIG. 2;

FIG. 6 shows a conventional example.

FIG. 7 is a diagram showing another conventional example.

[Explanation of symbols]

In the drawing, 11 is an antenna device for a mobile phone, 12 is a telephone antenna, 13 is a wireless device (wireless means), 15 is an antenna element for both transmission and reception, 17 is an antenna element for reception only, 25 is a feeding point, and 26 is a feeding point. RF input / output point for telephone, 27 is feeding point, 28 is RF input point for telephone, 3
0 is a passenger compartment, 31 is a rear tray, 41 is an antenna device for a car telephone, 42 is a telephone antenna, 43 is a GPS antenna, 44 is an amplifier (amplifying means), 45 is a wireless device (wireless means), and 52 is RF input / output point for GPS.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01Q 21/30 H01Q 21/30 F term (Reference) 3D020 BA13 BB01 BC01 BD03 BD05 5J021 AA03 AB06 CA03 CA06 DB07 HA07 HA10 JA03 5J045 AA05 AB05 CA01 CA04 FA01 LA01 MA04 NA01 NA04 5J046 AA08 AA09 AA12 AB13 MA08 5J047 AA02 AA08 AA09 AA12 AB06 AB10 AB13 EA01 EA06

Claims (3)

[Claims] 1. A telephone antenna having an antenna element, and wireless means for performing wireless processing, wherein the telephone antenna and the wireless means are integrated, and a feeding point of the antenna element of the telephone antenna is provided. And an RF input / output point for a telephone of the wireless means. 2. A GPS antenna, and amplifying means connected to the GPS antenna, wherein the GPS antenna, the amplifying means and the wireless means are integrated, and the amplifying means and the wireless means are integrated. 2. The antenna device for a mobile telephone according to claim 1, wherein the antenna device is directly connected to a GPS RF input / output point. 3. The antenna device for a mobile phone according to claim 1, wherein the antenna device is configured to be installable on a rear tray or an instrument panel in a vehicle cabin.