JPH0644250U - Automotive mobile reception adapter device for mobile communication equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To ensure that a portable mobile communication device brought into a vehicle can receive a call signal. [Structure] A two-branch circuit 7 for branching a received radio wave is provided between a connection line 6 connecting a car radio receiver 4 and an external receiving antenna 5 of the receiver 4, and one output of the two-branch circuit 7 is received by the above. Connected to the transmitter 4, and the other end is connected to the transmitting antenna 9 in the vehicle through the booster circuit 8, and the booster circuit 8 amplifies the radio wave in the operating frequency band of the mobile phone received by the external antenna 5 and the transmitting antenna 9 The electric field strength of the radio wave inside the vehicle is increased.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mobile communication device for a mobile communication device in a vehicle, for example, a mobile communication device for a mobile communication device for a mobile phone, a handy transceiver, etc., which enhances the electric field strength of a reception radio wave.

[0002]

[Prior art]

 Portable mobile communication devices, such as mobile phones, are currently operated by the analog method using the 800 MHz band. As shown in FIG. 7, a retractable antenna 2 is installed in a handset 1 incorporating a transceiver. The foldable items provided are becoming mainstream.

By the way, in the above-mentioned mobile phone, since communication is performed by the retractable antenna 2 with a small gain attached to the handset 1, even when brought in the vehicle, the antenna 2 is usually pulled out to go through the window. The communication of is possible. However, with the electric field strength inside the vehicle attenuated by the vehicle body, when the antenna 2 is housed in the handset 1 during standby reception, or even when the antenna 2 is pulled out, the handset 1 is separated from the window, for example, on the seat. There is a problem that the call cannot be received reliably and the signal cannot be received when it is placed in the etc.

As one solution to this problem, it is conceivable to newly install a reception antenna for a portable mobile communication device outside the vehicle body and guide the reception radio wave received by the reception antenna into the vehicle interior.

[0005]

[Problems to be solved by the device]

 However, in the case where the receiving antenna is newly provided on the outside of the vehicle body as described above, the vehicle body may be damaged when the antenna is attached, or it may be necessary to newly provide an insertion hole for a waveguide line (cable) or the like in the vehicle body. , That is a problem.

Therefore, an object of the present invention is to increase the electric field strength inside the vehicle without newly providing a receiving antenna for a portable mobile communication device outside the vehicle body.

[0007]

[Means for Solving the Problems]

 In order to solve the above problems, a branch circuit is provided between the connection lines of the broadcasting receiver installed in the vehicle and the external antenna connected to the receiver, and the branch circuit input is connected to the antenna, One output of the branch circuit is connected to the receiver, the other is connected to a receiving booster circuit capable of amplifying the operating frequency band of the portable mobile communication device, and an antenna for radiating the booster circuit output is connected. It was designed to be installed inside the car.

It is also possible to provide a holder for holding the portable mobile communication device in the vehicle and attach an antenna for radiating the booster circuit output to the holder.

The broadcast receiver installed in the vehicle is a vehicle such as a car radio or a car television that is attached to the vehicle or is optionally installed.

The portable mobile communication device is, for example, a mobile phone, a transceiver, or the like.

Further, the radio wave radiated from the antenna installed in the vehicle is, for example, a weak radio wave that does not require a license, that is, the electric field strength at a distance of 3 m from the radio equipment is 500 μv / m or less when the transmission frequency is 322 MHz or less. In addition, it is preferable to use 35 μv / m or less at a frequency exceeding 322 MHz and 10 GHz or less.

[0012]

[Action]

 In the vehicle reception adapter device for a portable mobile communication device configured as described above, the mobile reception device of the portable mobile communication device, which is induced by the reception antenna already installed in the vehicle, is in the standby state. The electric field strength that can be received by the mobile communication device is increased and radiated into the vehicle.

[0013]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. An automobile adapter device 3 for a portable mobile communication device of this embodiment shown in FIGS. 1 and 2 is a connection line for a vehicle-mounted broadcast receiver 4 such as a car radio or car television and a receiving antenna 5 of the receiver 4. An adapter for a mobile phone in which a bifurcating circuit 7 is provided between 6 and one output of the bifurcating circuit 7 is connected to the receiver 4 and the other is connected via a booster circuit 8 to a transmitting antenna 9 provided in the vehicle. In this embodiment, the car radio 4 and its receiving antenna 5 are used as the receiver 4 and the receiving antenna 5 in this embodiment.

The bifurcating circuit 7 bifurcates the received radio waves received by the receiving antenna 5 up to at least the 800 MHz band, which is the operating frequency of portable telephones, and is a so-called distributor or brancher. I am using what is called.

Further, the booster circuit 8 is for amplifying the above-mentioned branched reception radio wave, and may be one which can amplify the reception radio wave over all frequency bands up to 800 MHz band of the operating frequency of the mobile phone. In this embodiment, the one that selectively amplifies the 800 MHz band was used. In addition, the output level of the electric field strength 3 m away from the in-vehicle transmitting antenna 9 connected to the output of the booster circuit 8 is 35 μv / equivalent to the weak radio wave of the Radio Law so that this device can be operated without a license. It was set to be m or less.

The shape of the transmission antenna 9 can be variously selected depending on the arrangement in the vehicle, the convenience of use, etc. For example, a dipole antenna or an antenna coil having a length correlated with the wavelength λ of the transmission frequency is formed on the printed circuit board. A so-called printed antenna, as shown in FIG. 3, or the like in which radio waves are leaked from the waveguide line 10 provided in the vehicle may be used.

This embodiment is configured as described above, and the receiving antenna 5 constantly receives various radio waves including radio broadcasting radio waves and mobile phone operating radio waves. Is branched into two by a two-branching circuit 7, and one is input to the car radio 4. The car radio 4 selectively receives a radio wave from the radio wave by the tuning circuit. At this time, if the attenuation of the branch output to the car radio 4 by the two-branch circuit 7 is large, a booster circuit 11 for amplifying radio waves may be provided between the two-branch circuit 7 and the car radio 4. . On the other hand, the other output of the branch circuit 7 is input to the booster circuit 8 and the received radio wave in the 800 MHz band, which is the operating frequency of the mobile phone, is amplified and radiated from the transmitting antenna in the vehicle. . For this reason, the electric field strength in the above-mentioned band is remarkably increased as compared with the case where the electric field is directly propagated from the outside into the vehicle. Now, when a mobile phone that is currently on standby is brought into this car, and the call radio wave to this mobile phone is received by the receiving antenna 5 of the car radio 4, the received radio wave is strengthened by the above device 3. Because it is radiated into the car, the mobile phone is sensitive to ringing radio waves anywhere in the car away from the window, such as on a seat or with the antenna housed in a handset. The signal can be received.

As shown in FIG. 4, the transmitter antenna 9 of the adapter device 3 is provided with a holder 12 for holding a mobile phone in a console or the like beside the driver's seat, and a built-in device such as an embedded device in the holder 12. It may be attached to the outer surface of the holder 12 as shown in FIG. 5, or may be attached to the vicinity of the holder 12 as shown in FIG.

In this embodiment, the mobile phone is described as the portable mobile communication device, but a transceiver or the like can be used as the communication device. In that case, the branch frequency characteristic of the branch circuit 7, The amplification band of the booster circuit 8 and the transmission characteristics of the transmission antenna 9 are selected according to the operating frequency of the transceiver (for example, 400 MHz band).

[0020]

【effect】

 The present invention is configured as described above, and the electric field strength inside the vehicle can be enhanced without newly installing a receiving antenna for the portable mobile communication device outside the vehicle body, so that the vehicle body can be prevented from being damaged by the attachment of the antenna. Do not invite.

Also, for example, the call signal can be received even when the mobile phone is placed on a seat away from the window or the antenna is stored in the handset.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment.

FIG. 2 is a perspective view showing the appearance of FIG.

FIG. 3 is a block diagram showing another embodiment.

FIG. 4 is a block diagram showing another embodiment.

FIG. 5 is a perspective view showing a part of another embodiment.

[FIG. 6] Same as above

FIG. 7 is a perspective view of a mobile phone.

[Explanation of symbols]

 4 Car Radio Receiver 5 Car Radio Receiving Antenna 6 Connection Line 7 Bifurcating Circuit 8 Booster Circuit 9 Transmitting Antenna 12 Holder

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[Procedure amendment]

[Submission date] September 9, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

FIG. 6 is an operation diagram of the embodiment

Claims (2)

[Scope of utility model registration request] 1. A branch circuit is provided between a connection line of a broadcasting receiver installed in an automobile and an external antenna connected to the receiver, and a branch circuit input is connected to the antenna and the branch circuit is provided. One of the outputs is connected to the receiver, the other is connected to a booster circuit capable of amplifying the operating frequency band of the portable mobile communication device, and an antenna for radiating the booster circuit output is provided in the vehicle. A receiving adapter device for automobiles of a characteristic mobile communication device. 2. The vehicle reception adapter device for a portable mobile communication device according to claim 1, wherein a holder for holding the portable mobile communication device is provided in the vehicle, and the booster circuit output is provided in the holder. An automobile reception adapter device for a portable mobile communication device, which is equipped with a radiating antenna.