JPH0661887A - Cellular telephone set - Google Patents

Abstract

PURPOSE:To reduce a high frequency loss attended with the connection between a power amplifier and a portable telephone set of the cellular telephone set. CONSTITUTION:A portable telephone set 7 and a portable set antenna 6 are used to form a portable cellular telephone set. Moreover, an onvehicle cellular telephone set is consisted of an on-vehicle antenna 1, an antenna cable 2, a power amplifier 3, a curl cord 4, a connection unit 5, and the portable telephone set 7. The cellular telephone set is featured in the use of the in the on-vehicle mode, and the power amplifier 3 uses a reception wave mixer 304 to convert a received signal from a base station in the cellular telephone system into an intermediate frequency signal S6, and it is sent through a coaxial cable 43 and the connection unit 5 in the curl cord 4 to a demodulation section 84 of the portable telephone set 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cellular type portable telephone device (hereinafter referred to as a portable unit) and an automobile telephone device having an in-vehicle booster for receiving a plug-in connection of the portable unit, and more particularly to a portable telephone device. The present invention relates to a car telephone device having a booster of this kind in which high frequency signal loss due to connection between terminals is reduced.

[0002]

2. Description of the Related Art A conventional mobile telephone device of this type has a portable mode in which a portable unit is detached from a booster for use, and an in-vehicle mode in which the portable unit is plugged in with a booster for use. In the portable mode, the portable unit communicates with the built-in portable antenna, and in the in-vehicle mode, the portable unit has a connection unit for detachably connecting the unit and a coaxial cable already connected to the connection unit. Communication is performed by plug-in connection to a vehicle-mounted device including a curl cord, a power amplifier connected to the curl cord and fixed to a trunk or the like, and a vehicle-mounted antenna connected to the power amplifier. In the portable mode, the portable unit modulates a carrier signal generated by the first synthesizer with a communication signal or the like to generate a first transmission signal, and the portable device antenna converts the first transmission signal into a radio frequency signal. To the above base station. In addition, the portable device antenna uses the radio frequency signal from the base station as the first reception signal,
This first reception signal is amplified by the reception wave amplifier. The first received wave mixer of the portable unit produces a first intermediate frequency signal in response to the amplified first received signal and the first local oscillation signal generated by the second synthesizer, and the demodulation section produces the first intermediate frequency signal. A demodulated signal including a communication signal is generated from the intermediate frequency signal.

Further, when the portable unit is connected to the connection unit and the booster ON means of the connection unit is further activated, the power amplification device operates and the car telephone device enters the in-vehicle mode, and the user It is possible to communicate with a base station at a long distance. That is,
The power amplification device low-noise amplifies a weak second received signal based on a radio frequency signal received by the vehicle-mounted antenna from the base station, supplies the weak second received signal to the portable unit, and supplies the weak second received signal to the portable unit. A second transmission signal obtained by power-amplifying the first transmission signal by a power amplifier is supplied to the vehicle-mounted antenna to perform a booster operation to increase the communication distance between the car telephone device and the base station. In addition, the power amplification device includes a vehicle-mounted antenna-side transmission / reception duplexer that demultiplexes the second transmission signal and the second reception signal from each other, the first transmission signal, and the second reception signal after low-noise amplification. And a demultiplexer for transmitting and receiving data to and from the portable unit.

[0004]

The frequency of the radio frequency signal used by the above-mentioned car telephone system is, for example, AMPS (Advanced M) in the United States.
In the mobile phone-phone system) and the Japanese NTT system, the frequency is 800 MHz, and the frequencies of the transmission and reception signals are different from each other. Further, the frequency of the reception signal supplied from the power amplification device to the portable unit is the same as the frequency of the radio frequency signal transmitted from the base station. The frequency of the intermediate frequency signal is often selected to be about 90 MHz. Since the curl cord has a length of about 5 m, it is required to be compact and lightweight and flexible. Therefore, in order to satisfy this requirement, 1.5D-2W (RG-17 in the MIL standard) is used for the second received signal transmission.
4 / U) When a high frequency signal transmission cable equivalent to a coaxial cable is used, the transmission loss of the received signal due to the curl code is about 4.3 dB. Since the loss of the received signal due to the high frequency signal transmission cable is almost proportional to the square root of the frequency, when the radio frequency signal used in the car telephone system rises or shifts to the 1.5 GHz band etc. The transmission loss of the received signal due to is further increased.

In the conventional car telephone system, the received signal loss due to the curl high-frequency signal transmission cable and the two transmission / reception duplexers of the power amplification device is compensated by increasing the amplification gain of the reception wave amplifier of the portable unit. Therefore, there is a drawback that the total reception noise figure deteriorates. Furthermore, since the portable unit has no margin in supply voltage, power consumption, and volume, the circuit configurations of the reception wave amplifier and the reception wave mixer are also limited, and the reception wave mixer and the like having a limited circuit configuration are generated. There is a problem that reception characteristics are likely to deteriorate due to intermodulation deterioration and the like. Therefore, a first object of the present invention is to provide a car telephone device in which the received signal loss due to the power amplification device and the signal loss due to the high frequency signal transmission cable are reduced.

A second object of the present invention is to provide an automobile telephone device capable of increasing the degree of freedom in circuit constant distribution in the power amplifying device and the portable unit.

Further, a third object of the present invention is to provide an automobile telephone device having a stable receiving operation when mounted on a vehicle.

[0008]

An automobile telephone device according to the present invention, like the automobile telephone device of the prior art, has the portable device antenna, the portable unit, the vehicle-mounted antenna, the power amplifier device, and the power amplifier device. It is provided with a connection unit and the curl cord with a coaxial cable.

Further, the power amplifying apparatus further includes a second received wave mixer for converting the second received signal into a second intermediate frequency signal having the same frequency as the first intermediate frequency signal after the preamplifier. Prepare When the power amplification device is turned on, the second intermediate frequency signal is supplied to the portable unit via the high frequency signal transmission cable in the curl cord and the connection unit. Further, the portable unit has switch means for switching the signal from the first received wave mixer to the second intermediate frequency signal and supplying the signal to the demodulation unit in response to the power amplification device ON.

The second local oscillation signal to be supplied to the second received wave mixer is supplied from the first receiving synthesizer in the portable unit via the connecting unit and the coaxial cable in the curl cord. It may be the first local oscillation signal. The second local oscillation signal may be supplied from a third synthesizer provided in the power amplification device. In this case, of course, the local oscillator signal of the second synthesizer must be controlled by the channel control signal which controls the first synthesizer, which control signal is fed through the connection unit and the curl cord to amplify the power. Supplied to the device. The power amplifier does not need the portable unit-side duplexer because it does not exchange the first transmission signal and the second reception signal with the portable unit via the same high-frequency transmission cable.

[0011]

The present invention will be described below with reference to the drawings.

Referring to the block diagram of the first embodiment of FIG. 1, a mobile telephone device (portable unit) which is movable.
7 and the portable device antenna 6 connected to the antenna terminal 701 of the portable unit 7 constitute a portable car telephone device. Further, the portable unit 7 is connected to the connection unit 5 which is fixed to an armrest of the passenger compartment or the like and is supplied with the power output S7 of the voltage 13.8V from the vehicle-mounted battery 8.
, And turn on the switch 51 in this connection unit 5.
Then, this car telephone device becomes a vehicle-mounted car telephone device. Note that the vehicle-mounted antenna 1 already installed on the roof of the vehicle and the power amplification device 3 installed on the trunk of the vehicle have already been installed.
Are connected via an antenna cable 2, and the power amplification device 3 is connected to the connection unit 5 via a flexible curl cord 4.

First of all, the mobile phone mobile phone device will be described. The mobile phone antenna 6 converts the transmission signal S3 supplied from the antenna terminal 701 of the portable unit 7 into a first radio frequency signal so that the mobile phone system of the mobile phone system operates. The second radio frequency signal having a frequency different from the first radio frequency signal radiated from the base station is transmitted to the base station, converted into a reception signal S11, and supplied to the terminal 701. The portable unit 7 also transmits the transmission signal S3 based on the transmission signal S20 and the like received from the transmitter 82.
And the reception signal S21 generated based on the reception signal S11 is supplied to the receiver 83.

The portable unit 7 will be described in detail. The modulator 74 is a synthesizer (SYNT).
H) Carrier wave signal S14 from 75 and control unit (CONT)
81 in response to the modulation signal S15 from the transmission signal S
Make 3. The transmission signal S3 is supplied to the terminal 701 through one of the band-pass filter 72 and the antenna-side terminal of the switch 71. On the other hand, the received signal S11 from the terminal 701 is supplied to one of the antenna side terminals of the switch 71 and the band pass filter 73 (note that the band pass filters 72 and 73 composed of a dielectric filter or the like are used).
Are provided to an amplifier 77 via a transmission / reception duplexer for separating the transmission signal S12 and the reception signal S11), and are further amplified by the amplifier 77 into an amplified signal S13 to be received by a transistor mixer or the like. It is supplied to the mixing circuit 78. The received wave mixing circuit 78 generates an intermediate frequency signal S18 in response to the amplified signal S13 and the local oscillation signal S5 generated by the synthesizer (SYNTH) 76. The intermediate frequency signal S18 is supplied to the demodulation unit 84 via one of the input side terminals of the switch 79. The demodulation unit 84 amplifies the intermediate frequency signal S18 to a predetermined level, and then from the amplified signal S18. Received signal S21
The demodulation signal S22 including the control signal and the control signal is generated and output to the control unit 81.

The control unit 81 produces the modulated signal S15 based on the transmitted signal S20 received from the transmitter 82, receives the demodulated signal S22 and generates the received signal S21, and the received signal. S21 is supplied to the handset 83. The controller 81 also controls the channel control signal S16.
And S17 enable the synthesizers 75 and 76.
Channel control, and further, by using the modulation signal S15 and the demodulation signal S22, call connection (call origination connection and call termination connection), communication and the like with the base station are controlled. Operation part 8
Reference numeral 0 has input / output interface means with the user of the portable unit 7, and is connected to the control unit 81 to input / output a control signal S19 for call processing and communication control with the control unit 81. That is, the operation unit 80 is an LCD display unit that displays various messages such as a key operation unit for a user of the portable unit 7 to input a control input signal and a callee telephone number, a call duration, etc. input from the key operation unit. Etc. are included. Also, the battery pack (PS) 85
Supplies a power output S23 of voltage 6V to each circuit of the portable unit 7.

The switch 71 of the portable unit 7 boosts the power output (the booster ON signal representing the in-vehicle mode) S7 from the connection unit 5 to the booster ON state.
When received by the signal receiving terminal 705, the antenna side terminal is switched to the booster signal terminal 702, and the transmission signal S3 from the band pass filter 72 is supplied to this terminal 702. At the same time, the power supply output S7 connects the input terminal of the switch 79 to the intermediate frequency signal receiving terminal 704 and guides the intermediate frequency signal S6 from the terminal 704 to the demodulation unit 84.
The intermediate frequency signal S7 is converted into the demodulated signal S22 by the demodulator 84. The local oscillation signal S6 is always supplied to the local oscillation signal output terminal 703.

Further, referring to FIG. 1, the on-vehicle mode car telephone device will be described.
The transmission signal S2 is transmitted from the antenna terminal 301 of the power amplification device 3.
Is supplied via an antenna cable 2 such as a coaxial cable (for example, RG55A / U), the transmission signal S2 is converted into the first radio frequency signal and transmitted to the base station, and the radiation signal emitted from the base station is transmitted. The second radio frequency signal is converted into the reception signal S1 and supplied to the terminal 301. The power supply device 3 includes the terminal 70 of the portable unit 7.
The transmission signal S3 from 2 is received at the terminal 302 of the device 3 via the connection unit 5 and the curl cord 4, and the transmission signal S3 is power-amplified by the power amplifier 31 to produce the transmission signal S2. Further, the power amplification device 3 low-noise amplifies the reception signal S1, and then the local oscillation signal receiving terminal 303 supplies the amplified reception signal S4, the connection unit 5, and the curl cord 4 to the local oscillation signal receiving terminal 303. The intermediate frequency signal S6 mixed with the oscillation signal S5 is generated at the intermediate frequency signal transmission terminal 304. The intermediate frequency signal S6 is supplied to the intermediate frequency signal receiving terminal 705 of the portable unit 7 via the curl cord 4 and the connection unit 5.

Here, the curl cord 4 is a coaxial cable 41 corresponding to 1.5D-2V for transmitting a high frequency signal.
42, 43, a power supply line 44 for supplying a power supply output S7, and a control line (not shown) for a control signal transmitted and received between the power amplification device 3 and the portable unit 7 are bundled into one cable. It is a 5m cable. The curl cord 4 may be provided with connectors at both ends and may be connected to the power amplification device 3 and the connection unit 5 by the connectors.

The connection unit 5 passes the power supply output S7 having a voltage of 13.8V supplied from the vehicle-mounted battery 8 through the power supply output S7 and the power supply output S7 having a voltage of 6V.
It has a power supply (PS) 52 for converting into 8 and a switch 51 for turning ON / OFF the connection between the power supply output S7 and the terminal 504. Then, the terminal 7 of the portable unit 7
02 is connected to the terminal 302 of the power amplification device 3 via the terminal 501 of the connection unit 5 and the coaxial cable 41 of the curl cord 4. Similarly, the terminal 703, the terminal 502, the coaxial cable 42 and the terminal 303 are connected in cascade, the terminal 704, the terminal 503, the coaxial cable 43 and the terminal 304 are connected in cascade, and the terminal 705 and the terminal 5 are connected.
04, the power supply line 44, and the terminal 305 are connected in cascade. Further, the connection unit 6 includes a mechanism for detachably connecting the mobile phone device 7 with the terminals 501 to 505 of the connection unit and the terminals 702 to 706 of the mobile phone device 7 as contacts. Therefore, the portable unit 7 is connected to the connection unit 5, and then the switch 51 of the connection unit 5 is turned on.
Then, the power output S7 is supplied to the power amplification device 3 and the portable unit 7. The power source for the portable unit 7 is such that, when the portable unit 7 is connected to the connection unit 5, the power source 52 supplies the terminal 505 of the connection unit 5 and the terminal 7 of the portable unit.
It is switched to the power supply output S8 of the voltage 6V supplied via 06.

Explaining the power amplifier 3 in detail, the transmission signal S3 received by the terminal 301 is power-amplified by the power amplifier 31 into a transmission signal S2, and the transmission signal S2 is passed through the bandpass filter 32. Is supplied to the terminal 301. On the other hand, the reception signal S1 from the terminal 301 is passed through a bandpass filter 33 (note that the bandpass filters 32 and 33 form a transmission / reception demultiplexer for separating the transmission signal S2 and the reception signal S1). After passing, preamplifier 3
The received signal S4 is low-noise amplified by the signal S4. A reception wave mixer 35 such as a transistor mixer generates an intermediate frequency signal S6 in response to the reception signal S5 and the local oscillation signal S5 supplied from the terminal 303. The intermediate frequency signal S6 is transmitted from the terminal 304 to the coaxial cable 43.
Also, it is supplied to the terminal 704 of the portable unit 7 through the terminal 503 of the connection unit 5. In addition, terminal 3
Power supply output S7 supplied from the
1, supplied to the preamplifier 34 and the received wave mixer 35.

Attenuation amount of the coaxial cable equivalent to 1.5D-2W (RG-174 / U) used for the coaxial cables 41, 42 and 43 of the curl cord 4 used in the embodiment of FIG. 1 of FIG. 2 / Referring to the frequency characteristic diagram, the frequency 850
The loss per 5 m at 5 MHz at the frequency of 90 MHz of the intermediate frequency signal S7 is about 1.2 dB, while the loss per 5 m at the MHz is about 4.3 dB. In the power amplifier according to the prior art, the preamplifier has a high level in order to compensate for the received signal loss due to the coaxial cable and the loss due to the duplexer provided before and after the preamplifier corresponding to the preamplifier 34. I needed a gain. However, in the preamplifier 34 used in the power amplification device 3 of the present invention, the loss of the coaxial cable 43 may be less than that of the conventional one by about 3.1 dB, and the loss of one transmission / reception duplexer is reduced. There is an advantage that the points to be pursued can be narrowed down only to the low noise characteristic.

Referring to the circuit diagram of the received wave mixer 35 used in the embodiment of FIG. 1 of FIG.
In response to the 800 MHz band received signal S4 received at 11 and the local oscillation signal S5 received at the terminal 312 from the local oscillation signal receiving terminal 303, an intermediate frequency signal S6 of about 90 MHz is generated at the terminal 314. More specifically, the received signal S5 passes through the bandpass filter 351 using a coaxial filter or the like and the capacitor 354 and the transistor 3
Added to the base of 57. On the other hand, the local oscillation signal S6 having a frequency lower than that of the reception signal S4 by about 90 MHz is also used for the band pass filter 352 and the capacitor 35 similar to the above.
4 to the base of transistor 357.
Then, the transistor 357 mixes the received signal S4 and the local oscillation signal S5 to generate the intermediate frequency signal S6 at the terminal 314 connected to the collector of the transistor 357. The bias of the transistor 357 is given from the power supply output S7 having a voltage of 13.8V applied to the terminal 313. That is, the terminal 313 is connected to the transistor 3 via the resonator including the capacitor 355 and the inductor 356.
It is connected to the collector of 57 and is connected to the base via a resistor 353. The emitter of the transistor 357 is grounded.

The received wave mixer 78 of the portable unit 7 also has the same circuit diagram as that of the received wave mixer 35. However, since the received wave mixer 78 is required to consume low power, the terminal 313 is connected to a power supply of 6V voltage. Further, the received wave mixer 78 is also required to be downsized, and the band pass filters 531 and 3
A filter circuit equivalent to 52 uses a dielectric band filter, a SAW filter, or the like, which has a large loss but can be downsized.
On the contrary, the reception mixer 35 of the power amplification device 3 can be supplied with a high voltage and can operate with a large current, and may be a little larger, so that the occurrence and loss of intermodulation in the intermediate frequency signal generation can be reduced. . As a result, there is an effect that it is possible to stabilize the receiving operation when the car telephone device is used on a vehicle.

Referring to the block diagram of the second embodiment of the present invention in FIG. 4, this power amplifying apparatus 3A has a configuration similar to that of the power amplifying apparatus 3 shown in the embodiment of FIG.
5 is provided with a synthesizer 36 for supplying a local oscillation signal S31. The synthesizer 36 has the same function as the synthesizer 76 of the portable unit 7. Therefore, the synthesizer 36 is controlled to the frequency corresponding to the control signal by the channel control signal S17 received from the controller 81 of the portable unit 7 at the terminal 306. Therefore, the control signal S17 is supplied from the portable unit 7 to the terminal 306 of the power amplification device 3A via the connection unit 5 and the coaxial cable added to the curl cord 4. This power amplifier 3A has the effect of reducing the loss of the local oscillation signal S5 due to the curl code 4 in the embodiment of FIG.
The power of the local oscillation signal S5 generated by the synthesizer 76 of the portable unit 7 can be reduced.

[0025]

As described above, in the car telephone system of the present invention, the power amplifier 3 is provided with the received wave mixer for converting the received signal after the low noise amplification by the preamplifier into the intermediate frequency signal. The signal is transmitted to the portable unit through a coaxial cable containing a curl cord. Therefore, this car telephone device eliminates the signal loss due to the duplexer on the portable unit side and significantly reduces the signal transmission loss due to the coaxial cable. It is not necessary to compensate the signal transmission loss of the coaxial cable, and it is possible to increase the degree of freedom in distribution of the gain and noise figure of each circuit including the preamplifier and the received wave mixer. Occasionally, the occurrence of intermodulation distortion due to the received wave mixer can be reduced, so that the receiving operation can be stabilized.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a car telephone device of the present invention.

FIG. 2 is a coaxial cable (RG-1 shown in the embodiment of FIG.
74 / U) 43 is a diagram showing an attenuation amount / frequency characteristic.

FIG. 3 is a circuit diagram of a received wave mixing circuit 35 shown in FIG.

FIG. 4 is a block diagram of another embodiment of the car telephone system of the present invention.

[Explanation of symbols]

1 In-vehicle antenna 2 Antenna cable 3 Power amplification device 4 Curl cord 5 Connection unit 6 Portable device antenna 7 Portable telephone device 8 In-vehicle battery 31 Power amplifier 32, 33, 72, 73, 351, 352 Band pass filter 34 Pre-position Amplifier 35,78 Received wave mixer 41-43 Coaxial cable 36,75,76 (SYNTH) Synthesizer 44 Power supply line 51,71,79 Switch 52 Power supply unit (PS) 74 Modulation part (MOD) 78 Intermediate frequency amplifier 80 Operation part 81 Control Unit 82 Transmitter 83 Handset 84 Demodulator (DEM) 85 Battery Pack (PS) 301 to 306, 311 to 314, 501 to 505, 7
01-706 Terminal 353 Resistor 354, 355 Capacitor 356 Inductor 357 Transistor

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[Procedure amendment]

[Submission date] June 24, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

Claims (16)

[Claims] 1. A portable telephone device means which is movable, and which converts a radio frequency signal received from a communication partner station connected to the portable telephone device means for portable use into a first reception signal and to the communication partner station. Portable device antenna means for converting the first transmission signal to be transmitted into a radio frequency signal; power amplification device means fixed to the vehicle; and the radio frequency signal connected to the power amplification device means for in-vehicle use to the second reception signal An in-vehicle antenna unit that converts the second transmission signal to be transmitted to the communication partner station into a radio frequency signal, a vehicle fixed connection unit unit that detachably connects the portable telephone device, and the power amplification device A mobile telephone device of a mobile telephone system comprising a curl cord means for connecting the means and the connection unit, the portable telephone device First synthesizer means for generating a carrier signal corresponding to the control signal in response to a first channel control signal, modulating means for generating the first transmission signal in response to a modulation signal and the carrier signal, and the power In response to the booster ON signal, the booster ON signal receiving end for receiving the booster ON signal representing ON of the amplifying device means and one of the selection terminals are connected to the portable device antenna means and the other selection terminal is connected to the booster signal end. First selecting one of the selection terminals
A switch means, a signal output terminal, a signal input terminal for connecting the modulation means, and the first
A signal input / output terminal connected to an output terminal of the switch means, selecting the first transmission signal from the modulating means and outputting the selected first transmission signal to the signal output terminal, and outputting the first reception signal from the signal input / output terminal. First to select and output to the signal input / output terminal
Transmission / reception demultiplexing means, second synthesizer means for generating a first local oscillation signal corresponding to the control signal in response to a second channel control signal, the first local oscillation signal and the first transmission / reception demultiplexing means. First reception wave frequency mixing means for generating a first intermediate frequency signal in response to one reception signal, demodulation means for generating a demodulation signal from the first intermediate frequency signal, means for generating a reception signal from the demodulation signal, Control means for controlling call processing and communication with the communication partner station, including means for receiving a transmission signal to be generated as a modulated signal, means for generating the first and second channel control signals, and a user An input / output interface means and an operating means including means for inputting and outputting control signals associated with the call processing and communication control with the control means, wherein the connection unit means A booster ON signal generating means for generating the booster ON signal; and a plurality of connection terminals for detachably connecting the connection terminals of the portable telephone device means including the booster signal end and the booster ON signal receiving end, The curl cord means includes a connection line and a high frequency signal transmission cable corresponding to each connection terminal of the mobile phone device means, and the power amplification device means includes the booster signal via the connection unit means and the curl cord means. Power amplifying means for power-amplifying the first transmission signal received from the terminal to generate the second transmission signal; signal output terminal, signal input terminal for connecting the power amplifier means, and signal input / output terminal for connecting the vehicle-mounted antenna means And outputting the second transmission signal from the power amplification means to the signal input / output terminal and selecting the second transmission signal. Second output to said signal output terminal selects the second received signal from the input and output terminals
In a car telephone device comprising a transmission / reception demultiplexing unit and an amplification unit that amplifies the selected second received signal, the portable telephone device unit further includes a second intermediate signal having the same frequency as the first intermediate frequency signal. An intermediate frequency signal receiving end for receiving a frequency signal and one of the selection terminals are connected to the output end of the first received wave frequency mixing means, and the other of the selection terminals is connected to the intermediate frequency signal receiving end and responds to the booster ON signal. And a second switch means for selecting the other one of the selection terminals, the demodulation means being connected to an output end of the second switch means and generating the demodulated signal from the second intermediate frequency signal. The power amplifier device means is further responsive to the amplified second received signal and a second local oscillation signal having the same frequency as the first local oscillation signal Second receiving wave frequency mixing means for producing a number signal, said connection unit means and said curl code means comprising means for transmitting said second intermediate frequency signal from said power amplifier means to said portable telephone means. An automobile telephone device characterized by the above. 2. The mobile phone device according to claim 1, wherein the mobile phone device includes means for transmitting the transmission signal and means for receiving the reception signal. 3. The second local oscillation signal is the first local oscillation signal generated by the second synthesizer means, and the portable telephone device means further outputs the first local oscillation signal. An output end, the power amplifier device means comprises a local oscillation signal receiving end for receiving the first local oscillation signal supplied to the second received wave frequency mixing means, the connection unit means and the curl cord means,
The vehicle telephone apparatus according to claim 1, further comprising means for transmitting the first local oscillation signal from the local oscillation signal output end to the local oscillation signal reception end. 4. The first and second received wave frequency mixing means are transistor mixers, and the second received wave frequency mixing means operates at a power supply voltage higher than that of the first received wave frequency mixing means. The car telephone system according to claim 3. 5. The portable telephone device means further comprises a battery pack that supplies electric power to each of the means of the telephone device means when the portable device is used, and the connection unit further comprises a voltage of a vehicle-mounted battery. A power supply means for converting the same voltage as the supply voltage of the battery pack and supplying it to the portable telephone device means, and a connection ON of the on-vehicle battery and one of the connection lines to be connected to the booster ON signal receiving end are turned on. 4. The car telephone system according to claim 3, further comprising: a unit for setting the booster ON signal, and a unit for setting the on-vehicle battery output as a power source of the power amplifier unit. 6. The portable telephone device means further comprises a channel control signal output end for outputting the second channel control signal, and the power amplification device means further receives a channel for receiving the second channel control signal. A control signal receiving end; and a third synthesizer means for generating the second local oscillation signal corresponding to the control signal in response to the second channel control signal, wherein the connection unit means and the curl cord means include:
2. The car telephone system according to claim 1, further comprising means for transmitting the second channel control signal from a channel control signal output end of the portable telephone device means to the channel control signal reception end. 7. The first and second received wave frequency mixing means are transistor mixers, and the second received wave frequency mixing means operates at a power supply voltage higher than that of the first received wave frequency mixing means. The car telephone system according to claim 6. 8. The portable telephone device means further comprises a battery pack for supplying electric power to each of the means of the telephone device means when the portable device is used, and the connection unit further comprises a voltage of an on-vehicle battery. A power supply means for converting the same voltage as the supply voltage of the battery pack and supplying it to the portable telephone device means, and a connection ON of the on-vehicle battery and one of the connection lines to be connected to the booster ON signal receiving end are turned on. 7. The car telephone system according to claim 6, further comprising: a unit for setting the booster ON signal, and a unit for setting the on-vehicle battery output as a power source of the power amplifier unit. 9. A portable unit antenna means for converting a radio frequency signal received from a communication partner station of a car telephone system into a first reception signal and converting a first transmission signal to be transmitted to the communication partner station into a radio frequency signal. And a first synthesizer means for generating a carrier signal corresponding to the control signal in response to a first channel control signal, and a portable device antenna connecting means for connecting the first transmission signal in response to the modulation signal and the carrier signal. The generated modulation means, the booster ON signal receiving end for receiving the booster ON signal indicating the ON of the power amplification device means which is the booster of this device, and one of the selection terminals are connected to the portable device antenna connection means and the other of the selection terminals is connected. First switch means connected to a first booster signal terminal to select the other of the selection terminals in response to the booster ON signal; Signal output terminal and said modulating means and said signal input end of the connection first
A signal input / output terminal connected to an output terminal of the switch means, selecting the first transmission signal from the modulating means and outputting the selected first transmission signal to the signal output terminal, and outputting the first reception signal from the signal input / output terminal. First to select and output to the signal input / output terminal
Transmission / reception demultiplexing means, second synthesizer means for generating a first local oscillation signal corresponding to the control signal in response to a second channel control signal, the first local oscillation signal and the first transmission / reception demultiplexing means. First reception wave frequency mixing means for generating a first intermediate frequency signal in response to one reception signal, demodulation means for generating a demodulation signal from the first intermediate frequency signal, means for generating a reception signal from the demodulation signal, Control means for controlling the call processing and communication with the communication partner station, including means for receiving a transmission signal to be generated as a modulated signal, means for controlling the channels of the first and second synthesizer means, respectively. An input / output interface with a user and an operating unit including a unit for inputting and outputting a control signal associated with the call processing and communication control with the control unit. Type telephone device, wherein the portable telephone device further includes an intermediate frequency signal receiving end for receiving a second intermediate frequency signal having the same frequency as the first intermediate frequency signal, and one of the selection terminals for the first received wave frequency mixing. Second switch means connected to the output terminal of the means, the other of the selection terminals being connected to the intermediate frequency signal receiving end, and selecting the other of the selection terminals in response to the booster ON signal, the demodulation means comprising: A portable telephone device of an automobile telephone system, which is connected to an output terminal of the second switch means and produces the demodulated signal from the second intermediate frequency signal. 10. The mobile phone device according to claim 9, wherein the mobile phone device further comprises means for transmitting the transmission signal and means for receiving the reception signal. 11. The portable telephone device according to claim 9, wherein the portable telephone device further comprises a local oscillation signal output end for outputting the first local oscillation signal. 12. The portable telephone device means further comprises:
10. The portable telephone device according to claim 9, further comprising a channel control signal output terminal for outputting the second channel control signal. 13. A vehicle-mounted antenna means for converting a radio frequency signal from a communication partner station of a car telephone system into a second reception signal and converting a second transmission signal to be transmitted to the communication partner station into a radio frequency signal. Vehicle-mounted antenna connection means, power amplification means for power-amplifying the first transmission signal received from the booster signal end to generate the second transmission signal, signal output end, signal input end connected to the power amplification means, and the vehicle-mounted A signal input / output terminal connected to the antenna means, selecting the second transmission signal from the power amplifying means, outputting the second transmission signal to the signal input / output terminal, and selecting the second reception signal from the signal input / output terminal. And then output to the signal output end
In a power amplification device comprising a transmission / reception demultiplexing device and an amplification device that amplifies the second reception signal from the signal output end, the power amplification device further includes a second local oscillation signal and the second amplified signal. A power amplifying device comprising a second received wave frequency mixing means for generating a second intermediate frequency signal in response to the received signal. 14. The power amplification device according to claim 13, wherein the power amplification device further includes a local oscillation signal input end that receives the second local oscillation signal. 15. The power amplification device further generates a channel control signal receiving end that receives a second channel control signal, and generates the second local oscillation signal corresponding to the control signal in response to the second channel control signal. The power amplification device according to claim 13, further comprising a third synthesizer means. 16. The portable telephone device according to claim 13, wherein said second received wave frequency mixing means is a transistor mixer.