JP2689850B2 - Mobile phone equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile phone system, and more particularly to a mobile phone device having a diversity receiving function.

[0002]

2. Description of the Related Art Recently, mobile phone services have become widespread as the size and weight of mobile phones have been reduced. Although small and lightweight mobile phones themselves have limited transmission power, practical service is possible by using the car phone system.

FIG. 4 is a block diagram showing a receiving system of a portable device in a conventional portable telephone device.

First, when the mobile phone is removed from the car adapter of an automobile and carried around, the switches 103 and 104 are connected as shown in the drawing, and the antennas 101 and 1 are connected.
The received signal from 02 is input to the receiving circuits 105 and 106, respectively.

The receiving circuits 105 and 106 perform frequency conversion and electric field strength detection, and output electric field strength detection signals to the comparison circuit 107 and output frequency-converted received signals to the switch 108, respectively.

The comparator circuit 107 compares the electric field strengths of the two received signals and controls the switch 108 so as to select the received signal having the higher electric field strength level.

The received signal selected by the switch 108 is signal-processed and output from a speaker (not shown) of the mobile phone.

When using a mobile phone in an automobile,
By connecting the signal connection unit 109 of the mobile phone to the car adapter and switching the switches 103 and 104 to the car adapter side, the reception signal is set to be received from the two antennas equipped in the vehicle. The receiving operation is as described above.

By thus providing the diversity receiving function having the two-system receiving circuit, the influence of fading can be reduced.

Further, as shown in FIG. 5, a configuration has been proposed in which a removable switch 202 is provided for a portable device 201 having a diversity receiving function, and the switch 202 controls the switching of the diversity antennas 203 and 204. (Japanese Utility Model Publication No. 60-93342).

[0011]

However, in the above-mentioned conventional portable telephone device, it is necessary to provide two lines of the receiving circuit for the fading countermeasure in the portable telephone, and the portable telephone is required to have a small size and low power consumption. There was a problem that it would be difficult to promote.

[0012]

Therefore, the portable telephone device according to the present invention has a structure in which one of two receiving circuits for diversity reception is provided on the adapter side.

[0013]

That is, a mobile phone device according to the present invention includes a first antenna and a first antenna that is connected to the first antenna.
Receiving means connection has been first system, and a second antenna, wherein
An adapter having a transmission booster connected to the second antenna, a third antenna, and a third antenna connected to the third antenna.
A receiving means of the second system that the transmission blanking of said adapter
Suta or the by selecting one of the third antenna
A connection to that selection means to the receiving means of the second system, a mobile phone having a switching means for switching signals between the first system and the second system integration of the receiving means, and said adapter and said mobile telephone Can be connected or disconnected, first of the adapters
Electrically connected to the receiving means of the system to the switching means, and signal <br/> No. connecting means and you electrically connecting the transmission booster before hexene-option means, Ri Tona, during reception, The first and the first
The signals received by the two antennas are respectively the first
And input to the receiving means of the second system, and when transmitting, transmit
A signal from the means is transmitted through the transmission booster to the second
Input to the antenna .

The adapter is preferably a car adapter provided in the automobile, and the first and second antennas thereof are mounted on the automobile.

[0015]

When the mobile phone is disconnected from the adapter, the antenna selection means operates the third mobile phone in the mobile phone.
An antenna is selected, and transmission / reception is performed only by the receiving means of one receiving system. Because it is carried, fading can be easily dealt with.

When the mobile phone is connected to the adapter, the antenna selecting means selects the second antenna on the adapter side. Therefore, diversity reception is performed using the first and second antennas on the adapter side.

By providing one of the two receiving means for diversity reception on the adapter side, the structure of the portable telephone can be simplified and the size and weight can be reduced. Further, since the driving current for the receiving circuit of the mobile phone is reduced, it is possible to further promote the reduction of power consumption.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic block diagram illustrating the configuration of only the receiving system of the portable telephone device according to the present invention.

In the figure, the mobile phone 1 and the car adapter 2 in the automobile are provided with signal connection portions 3 and 4, respectively, and the mobile phone 1 is detachably attached to the car adapter 2 via these signal connection portions. is there.

When the mobile phone 1 is used in a car, it is connected to the car adapter 2 to utilize the antenna equipped in the car, and when it is carried and used, the car adapter 2 is used.
The antenna inside the mobile phone 1 is used separately from the above.

In the portable telephone device of the present invention, the receiving circuit 5 of one receiving system for diversity reception is provided in the portable telephone 1, and the receiving circuit 6 of the other receiving system is provided in the car adapter 2.

The receiving circuits 5 and 6 perform frequency conversion and electric field strength detection, output electric field strength detection signals to the comparison circuit 7, and output frequency converted reception signals to the switch 8. However, the electric field strength detection signal and the reception signal from the reception circuit 6 of the car adapter 2 are the signal connection unit 3
It is input to the comparison circuit 7 and the switch 8 via 4 and 4.

The comparison circuit 7 compares the electric field strengths of the two received signals and controls the switch 8 so as to select the received signal having the higher electric field strength level. The received signal selected by the switch 8 is signal-processed and output from the speaker (not shown here) of the mobile phone.

When the mobile phone 1 is used in a car, it is connected to the car adapter 2 and the antenna selection switch 1
Switch 1 and connect to the car antenna side as shown. The reception signal from one antenna of the automobile is input to the reception circuit 6 of the car adapter 2, and the reception signal from the other antenna is input to the reception circuit 6 of the mobile phone 1 to obtain the reception signal of the higher electric field strength level. Is selected by the switch 8. That is, normal diversity reception is performed.

When the portable telephone 1 is taken out and used, the antenna selection switch 11 is connected to the side of the portable telephone which selects the antenna 10 and the signal is received through the receiving circuit 5. In this case, the switch 8 is in a state of being connected to the receiving circuit 5 side. Therefore, diversity reception is not performed. However, since the telephone 1 is carried, fading can be easily dealt with by changing the direction of the body.

As described above, by installing the one receiving circuit 6 in the car adapter 2, it becomes possible to further reduce the size and weight of the mobile phone 1 and reduce the power consumption.

Next, embodiments of the mobile phone and the car adapter according to the present invention will be described in more detail.

FIG. 2 is a block diagram of a mobile phone in an embodiment of the mobile phone device according to the present invention. The present embodiment is a quasi-microwave band digital type mobile phone device. Also, the same block elements as in FIG. 1 are assigned the same numbers.

The antenna 10 of the mobile phone 1 receives the receiving circuit 5 through the antenna selection switch 11 and the transmission / reception duplexer 12.
Connected to.

The antenna selection switch 11 selects the antenna 10 in the telephone 1 when it is carried, and selects the antenna on the side of the car adapter 2 through the signal connector 3 when connected to the car adapter of the automobile.

In the receiving circuit 5, the received signal in the quasi-microwave band is converted into a frequency in the base band by the frequency converting circuit 501, amplified by the amplifying circuit 502, and sent to the switch 8. Further, the electric field strength of the received signal is detected by the electric field strength detection circuit 503, and the detected signal is sent to the comparison circuit 7.

The output from the comparison circuit 7 causes the switch 8
Selects the signal with the higher electric field strength level and outputs it to the reception baseband signal processing circuit 13. The reception baseband signal is subjected to signal processing such as demodulation in the reception baseband signal processing circuit 13, decoded by the encoding / decoding circuit 14, and output as sound from the speaker 15.

On the other hand, when transmitting voice, the microphone 16
The voice is converted into an electric signal by the encoding / decoding circuit 14 and is output to the transmission baseband signal processing circuit 17. Then, after signal processing such as modulation is performed by the transmission baseband signal processing circuit 17, the transmission signal is transmitted via the transmission circuit 18, the transmission / reception duplexer 12, and the antenna selection switch 11. When it is carried, it is transmitted from the antenna 10 of the mobile phone 1, and when it is mounted on the vehicle, it is transmitted from the antenna of the car adapter.

The control circuit 19 controls the display operation unit 20 such as a dial and a liquid crystal display unit and the telephone.

FIG. 3 is a block diagram of the car adapter in this embodiment.

One antenna 21 mounted on the automobile is connected to the receiving circuit 6 provided in the car adapter 2. The other antenna 23 is connected to the antenna selection switch 11 of the mobile phone 1 through the signal connection unit 4. The antenna 23 is connected to the transmission booster 22 if necessary.

In the receiving circuit 6, the received signal in the quasi-microwave band is converted into the frequency in the base band by the frequency converting circuit 601, amplified by the amplifying circuit 602 and passed through the signal connecting section 4 to the switch 8 of the mobile phone 1. Sent to.

The electric field strength of the signal received from the antenna 21 is detected by the electric field strength detection circuit 603, and the detected signal is sent to the comparison circuit 7 of the mobile phone 1 through the signal connection unit 4.

Therefore, when the mobile phone 1 is connected to the car adapter 2, the signals received by the vehicle-mounted antennas 21 and 23 are respectively received by the reception circuit 6 of the car adapter 2 and the reception circuit 5 of the mobile phone 1. input.
At the time of transmission, the signal is transmitted from the antenna 23 via the switch 11, the signal connection units 3 and 4, and the transmission booster 22 from the transmission circuit 18 of the mobile phone 1.

[0041]

As described in detail above, the portable telephone device according to the present invention is provided with one of the two receiving circuits for diversity reception on the side of the car adapter, so that the receiving system as a countermeasure against fading can be obtained. While maintaining the above, the configuration of the mobile phone can be simplified, and further reduction in size and weight and cost can be achieved.

Further, since it is sufficient to drive one receiving circuit, it is possible to reduce the power consumption, and it is possible to lengthen the call time and the standby time when the mobile phone is used.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram illustrating the configuration of only a receiving system of a mobile phone device according to the present invention.

FIG. 2 is a block diagram of a mobile phone in an embodiment of a mobile phone device according to the present invention.

FIG. 3 is a block configuration diagram of a car adapter in the present embodiment.

FIG. 4 is a block configuration diagram showing a receiving system of a portable device in a conventional portable telephone device.

FIG. 5 is a block diagram of another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mobile phone 2 Car adapter 3 Signal connection part 4 Signal connection part 5 Reception circuit 6 Reception circuit 7 Comparison circuit 8 Switch 10 Mobile phone antenna 11 Antenna selection switch 12 Transmission / reception duplexer 13 Reception baseband signal processing circuit 14 Encoding / decoding Circuit 15 Speaker 16 Microphone 17 Transmission baseband signal processing circuit 18 Transmission circuit 19 Control circuit 20 Display operation unit 21 Car-mounted antenna 22 Transmission booster 23 Car-mounted antenna

Claims (6)

(57) [Claims] 1. A mobile phone device having two-system receiving means for diversity reception , wherein a first antenna, a first-system receiving means connected to the first antenna, a second antenna, and the first antenna are provided . 2 antennas
Select the connected transmission booster, the adapter having a third antenna, a receiving means of the second system connected to the third antenna, one of the transmission booster or the third antenna of said adapter Of the second system
And selection means to connect to the receiving means, the first system and the second system
A mobile phone having a switching means for switching signals between standard receiving means , and the adapter and the mobile phone can be connected or disconnected, and the first-system receiving means of the adapter is electrically connected to the switching means. connected to, and the and signal connection means you electrically connected before hexene-option means the transmission booster, Tona is, during reception, is received by the first and second antenna
Received signals of the first and second systems, respectively.
The signal from the transmission means is input to
Input to the second antenna via a booster
A mobile phone device. Wherein when said cellular phone is disconnected from the adapter, the portable telephone apparatus before cyclohexene-option unit according to claim 1, wherein the selecting the third antenna. 3. Receiving means for the first system and the second system
Is characterized by including an electric field strength detection means.
The described mobile phone device. 4. The switching means of the mobile phone is provided with an electric field strength.
4. The method according to claim 3, wherein the higher level is selected.
Mobile phone device listed. 5. The signal connecting means is for receiving the first system.
The detection signal from the electric field strength detection means of the communication means
4. The method according to claim 3, wherein the step can be connected to a stage.
Mobile phone device listed. 6. A mobile phone, the mobile phone and removably and electrically connectable vehicle adapter, the mobile telephone device consisting of, the vehicle adapter, a first antenna for receiving radio waves, the a first receiving means connected to the first antenna, a second antenna for transmitting and receiving radio waves, anda transmission booster connected to the second antenna, the mobile phone includes a third antenna that sends and receives radio waves , Either the transmission booster of the in-vehicle adapter or the third antenna is selected to connect to the receiving means of the second system.
A ting to selection means, before and second receiving means for inputting a received signal from said third antenna selected by the hexene-option means, said first receiving means and said mobile telephone of said vehicle adapter
It is connected to the said second reception means, and switching means for switching the received signals, transmit signal via the transmission booster to the second antenna
And a transmission means for supplying the mobile phone device.