JP2002111532A - Two-way communication module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-way communication module that can cope with various types of two-way communications equipment. SOLUTION: The antenna terminal 11 of this two-way communication module is provided near one corner of a module substrate 40, and grounds 41 and 44 are provided on the side faces 41 and 44 of the substrate 40, on both sides of the corner. Consequently, this two-way communication module can cope with various types of two-way communications equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-way communication module used for a two-way communication device or the like.

[0002]

2. Description of the Related Art A conventional two-way communication module will be described below.

As shown in FIG. 7, a conventional two-way communication module includes a housing 1 of a two-way communication device and a module board 2 mounted in the housing 1. The antenna 3 was provided on the upper surface of the housing 1. On the other hand, on the module board 2, an antenna switch 4 connected to the antenna 3, a receiver 5 connected to one terminal of the antenna switch 4, an output terminal 6 connected to an output of the receiver 5, A PLL synthesizer 7 connected to the transmitter 5, an input terminal 8 of the transmitter, a transmitter 9 connected to the input terminal 8, and an output terminal of the transmitter 9 connected to the antenna switch 4. And the power amplifier 10. As described above, the two-way communication module of the conventional two-way communication device includes an antenna switch 4, a receiver 5, a PLL synthesizer 7,
The transmitter 9 and the power amplifier 10 were mounted.

[0004]

However, in such a conventional configuration, the casing 1 of the two-way communication device may be vertically long, horizontally long, or the antenna 3 depending on its use.
Was provided at the upper right or at the upper left, and could not meet the demands of various specifications. Therefore, in such a case, it is necessary to redesign the board 2 of the bidirectional communication module each time.

The present invention has been made to solve such a problem, and has as its object to be able to be mounted on these various types with one bidirectional communication module.

[0006]

In order to achieve this object, an antenna terminal of the bidirectional communication module of the present invention is provided near one corner of the module substrate, and a ground is provided on both sides sandwiching this corner. This is a configuration provided. With this configuration, it can be mounted on various types of two-way communication devices.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to an antenna terminal provided on a substantially rectangular module substrate, a dual antenna switch for connecting a signal of the antenna terminal to a common terminal, The dual-band antenna switch includes a dual-band transmitting unit connected to one terminal of the dual-antenna switch, and a dual-band receiving unit connected to the other terminal of the dual-antenna switch. An input terminal, a signal input to the transmission signal input terminal is connected to one input, and a modulator connected to an output of a PLL synthesizer to the other input, and an output of the modulator is connected to one input. And the other input is connected to the output of the PLL synthesizer via a local voltage-controlled oscillator. A voltage-controlled oscillator, and a power amplifier connected between the output of the voltage-controlled oscillator and one terminal of the dual-use antenna switch, wherein the dual-band receiving unit includes the dual-use antenna switch. Is supplied to one input and the other input is connected to the PL.
A receiving mixer to which the output of the L synthesizer is connected via the local voltage controlled oscillator, and a detector to which the output of the receiving mixer is supplied to one input and the output of the PLL synthesizer is connected to the other input And a reception signal output terminal to which the output of the detector is connected.The antenna terminal is provided near one corner of the module substrate, and grounds are provided on both sides sandwiching this corner. Since the dual antenna terminal is provided near one corner of the module substrate, the two-way communication device can be vertically or horizontally long, the antenna can be provided at the upper right, the upper left Can also be handled. In addition, since grounds are provided on both side surfaces sandwiching the antenna terminal, the effects of radiation energy output from the antenna are hardly received in the module. In addition, since both the transmission unit and the reception unit are for dual use, transmission and reception of two bands can be performed.

According to a second aspect of the present invention, a transmission signal input terminal, a reception signal output terminal, and a digital signal terminal input to a PLL synthesizer are provided on both sides of the other side of the module board. The two-way communication module according to claim 1, wherein the transmission signal, the reception signal, and the signal input to the PLL synthesizer are far from the antenna, so that these signals do not affect the antenna.

According to a third aspect of the present invention, there is provided a bidirectional communication module according to the second aspect, wherein an electrode terminal is formed on a side surface. Surface mounting can be performed on the mother board, and a thin bidirectional communication device can be obtained.

According to a fourth aspect of the present invention, a ground terminal is formed on one side surface of a module substrate, and a transmission voltage controlled oscillator of an offset system, a power amplifier, and a dual terminal are formed along this side surface. 2. The bidirectional communication module according to claim 1, wherein the antenna switch for transmission is arranged in this order, and the transmission voltage controlled oscillator and the power amplifier are separated by a ground pattern. Since the high-output transmission power does not interfere with the transmission voltage-controlled oscillator, characteristics such as transmission modulation accuracy are improved.

According to a fifth aspect of the present invention, a local voltage-controlled oscillator is disposed near one side on which a dual antenna switch is mounted and near the other side.
On the other side facing the transmitting voltage controlled oscillator, the PL
5. The bidirectional communication module according to claim 4, further comprising a reference signal terminal input to the L synthesizer, wherein the high output power output from the dual antenna switch does not interfere with the local voltage controlled oscillator. Characteristics such as transmission modulation accuracy are improved. Also, harmonic components of the reference signal do not enter the dual antenna switch and do not interfere with the received signal.

According to a sixth aspect of the present invention, among the outputs of the power amplifier, the output with the lower frequency is wired along the side surface of the module substrate and input to the dual antenna switch, and 5. The bidirectional communication module according to claim 4, wherein a higher frequency output of the power amplifier output is wired between opposing surfaces of the power amplifier and the dual antenna switch. The signal line is longer than the signal line with the higher frequency, and frequency matching can be easily achieved.

According to a seventh aspect of the present invention, the output having the higher frequency is provided on an inner layer of the module substrate, and a ground plane is provided between the inner layer and the surface. A two-way communication module,
Since the low-frequency output signal line and the high-frequency output signal line are separated by the ground pattern, mutual signal interference is reduced.

According to an eighth aspect of the present invention, a ground pattern is provided between a power amplifier and the dual antenna switch, and a ground pattern is provided between an output having a higher frequency and an output having a lower frequency. 5. The bidirectional communication module according to claim 4, wherein a ground pattern is provided also between the power amplifier and the dual antenna switch, and between the low-frequency output signal line and the high-frequency output signal line. Since they are separated, mutual signal interference is reduced.

According to a ninth aspect of the present invention, there is provided the bidirectional communication module according to the fourth aspect, wherein a shield case is provided on the module substrate, and the top surface of the shield case is bent to form a compartment. Since the compartments are formed by bending the top surface of the shield case, the shielding effect between the compartments can be improved.

According to a tenth aspect of the present invention, there is provided the bidirectional communication module according to the ninth aspect, wherein the transmitting voltage controlled oscillator, the dual antenna switch, and the local voltage controlled oscillator are respectively disposed in separate compartments. In the shield case, the transmission voltage controlled oscillator, the dual antenna switch, and the local voltage controlled oscillator are formed with separate compartments, so that the shielding effect between the compartments can be improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a two-way communication module according to an embodiment of the present invention. FIG. 2 is a block diagram of the bidirectional communication module.

In FIG. 2, reference numeral 11 denotes an antenna terminal, and this antenna terminal 11 is connected to a dual antenna switch 12. From one terminal 12a of the dual antenna switch 12, a receiving RF filter 13, a receiving amplifier 14, and a receiving RF filter 15 are connected in this order.
Is connected to one input of a receiving mixer 16. Note that signals up to this point use dual circuits of a low frequency of about 900 MHz and a high frequency of about 1800 MHz.

The reception mixer 16 is mixed with the output signal from the local voltage controlled oscillator 17, and its output passes through the reception IF filter 18 and then to the IF filter.
The signal is input to the amplifier 19. The output of this IF amplifier 19 is connected to one input, and the other input is
The output of the L synthesizer 20 is connected, detected by the detector 21, and output to the reception signal output terminal 22.

On the other hand, the transmission signal input terminal 23 is connected to the modulator 2
4 is connected to one input, and the other input receives a signal from the PLL synthesizer 20.
The output of the modulator 24 is connected to one input of a transmission PLL 26 via an IF filter 25.

A signal from the local voltage controlled oscillator 17 is input to the other input of the transmission PLL 26 via a transmission mixer 27. The output of the transmission PLL 26 is connected to a transmission voltage control oscillator 29 via a transmission low-pass filter 28. The output of the transmission voltage controlled oscillator 29 is connected to the other input of the transmission mixer 27 and to the other input 12b of the dual antenna switch 12 via the power amplifier 30.

Here, the transmission voltage controlled oscillator 29 and the power amplifier 30 operate at a low frequency of about 900 MHz,
A dual circuit of a high frequency of 00 MHz is used. Here, the transmission voltage control oscillator 29, the transmission mixer 27, the transmission PLL 26, and the transmission low-pass filter 28 form an offset transmission voltage control oscillator.

On the other hand, the PLL synthesizer 20 includes an IF PLL 33 to which the signal of the reference signal input terminal 31 is input to one end and the output of the local voltage controlled oscillator 32 for the detector connected to the other input, and an IF PLL 3
3 and an IF low-pass filter 34 connected between the detector local voltage controlled oscillator 32 to form a receiving voltage controlled oscillator, the output of which is connected to the other input of the detector 21.

A modulator local voltage controlled oscillator 35 is connected between the IF PLL 33 and the IF low-pass filter 34. The output of the modulator local voltage controlled oscillator 35 is connected to the other input of the modulator 24. It is connected.

On the other hand, the output of the IF PLL 33 is RF P
LL 36 is connected to one input of the LL 36, and its output is connected to the local voltage controlled oscillator 1 via an RF low-pass filter 37.
7 is connected. This local voltage controlled oscillator 17
Is connected to the other input of the RF PLL 36. Here, the local voltage controlled oscillator 17
It is configured as a dual system of a local voltage controlled oscillator 17a and a second local voltage controlled oscillator 17b.

Next, a description will be given of how these arrangements are made with reference to FIG. In FIG. 1, 4
Reference numeral 0 denotes a module substrate formed of a multilayer substrate. One side 41 of the module substrate 40 and the other side 4
The antenna terminal 11 is provided at the corner of the second.

A ground terminal 43 is provided on one side surface 41, and the transmission voltage control oscillator 29, the power amplifier 30,
The dual antenna switch 12 and the dual antenna switch 12 are linearly arranged in this order.

The other side surface 44 of the module substrate 40
, A local voltage controlled oscillator 17 is arranged at a position facing the dual antenna switch 12, and a reception IF filter 18 is provided at a position facing the local voltage controlled oscillator 17. That is, the dual antenna switch 12 and the receiving IF filter 18 are located on diagonal lines.

A reference signal input terminal 31 is provided on a diagonal side remote from the dual antenna switch 12, and the reception signal output terminal 22 and the transmission signal input terminal are provided on the side where the reference signal input terminal 31 is provided. 23 are provided in this order.

A digital signal terminal 45 input to the PLL synthesizer 20 is provided on a side surface facing the antenna terminal 11. A power supply terminal 46 is provided on the antenna terminal 11 side.

On the module board 40, a ground pattern 47a is provided between the transmission voltage controlled oscillator 29 and the power amplifier 30 to separate signals between the two circuits. Also, a ground pattern 47b is provided between the transmission voltage control oscillator 29, the power amplifier 30, the dual antenna switch 12, and the local voltage control oscillator 17 to separate signals between these circuits.

Here, the receiving RF filter 13 and the receiving amplifier 14 are provided near the power amplifier 30. A ground pattern 47c is also provided between the power amplifier 30 and the dual antenna switch 12 to separate signals.

Next, the details of the power amplifier 30 and the dual antenna switch 12 will be described with reference to FIG. Among the outputs of the power amplifier 30, the lower output of the frequency of about 900 MHz is connected to the signal line 50 along the side surface 41. Also, of the output of the power amplifier 30, about 1800M
The output with the higher frequency of Hz is connected to the power amplifier 30 and the side surfaces of the dual antenna switch 12 by a signal line 51.

With this connection, the lower-frequency signal line 50 is connected to the higher-frequency signal line 51.
Longer, and the frequency matching becomes easier.

A ground pattern 47c separates the power amplifier 30 from the dual antenna switch 12. 52 is a low-frequency output signal line 50;
This is a ground pattern for separating the high frequency output signal line 51.

Here, the low-frequency output signal line 50 is used.
And the high-frequency output signal line 51 are provided on the same plane, but either one of them may be provided in the inner layer of the module substrate 40. By doing so, mutual signal interference is reduced.

Next, FIG. 4 is a perspective view of the shield case 55 put on the module substrate 40. The shield case 55 has a rectangular shape, and a leg 5
6 are provided. The legs 56 are connected to the module board 4
0 and soldered to ground,
It has a shielding effect and strengthens the ground.

The top surface 57 of the shield case 55 is bent inward to form a compartment 58. Thus, the compartment 57 is formed by bending the top surface 57 downward by 90 degrees, and the dual antenna switch 12 is mounted in the compartment 58. Legs 58a are similarly provided in the bent portions, and are inserted into the module substrate 40 and soldered to the ground. This allows
The shielding effect can be improved. Reference numeral 59 denotes a hole formed by providing the bent portion.

The compartment 6 having the hole 59
At 0, a power amplifier 30 is mounted. This allows
The hole 59 also has a heat radiation effect of the power amplifier 30. As described above, since the antenna terminal 11 is located near one corner of the module board 40, even if the antenna 71 is on the right side of the bidirectional communication device 70 as shown in FIG. 11 can be provided. Further, even when the antenna 73 is provided on the left side of the bidirectional communication device 72 as shown in FIG.
1 can be placed near the antenna 73. Thus, by using the bidirectional communication module of the present invention, various types of bidirectional communication devices 70 and 7 can be used.
2 can be handled.

[0040]

As described above, according to the present invention, the antenna terminal of the bidirectional communication module of the present invention is provided near one corner of the module substrate, and the ground is provided on both sides sandwiching this corner. With this configuration, it is possible to support various types of bidirectional communication devices.

[Brief description of the drawings]

FIG. 1 is a plan view of a two-way communication module according to an embodiment of the present invention.

FIG. 2 is a block diagram of the same.

FIG. 3 is a plan view of a main part of the same.

FIG. 4 is a perspective view of the shield case put on the module substrate.

FIG. 5 is a plan view of a main part of a first two-way communication device using the two-way communication module of the present invention.

FIG. 6 is a plan view of a main part of the second two-way communication device;

FIG. 7 is a block diagram of a conventional two-way communication module.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Antenna terminal 12 Dual antenna switch 16 Receiving mixer 17 Local voltage controlled oscillator 20 PLL synthesizer 21 Detector 22 Received signal output terminal 23 Transmission signal input terminal 24 Modulator 29 Transmission voltage controlled oscillator 30 Power amplifier 40 Module board 41 Side surface 42 sides

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5E338 AA02 BB65 CC01 CC06 CD12 EE13 EE31 5K011 AA00 AA03 AA06 AA16 DA04 DA07 DA15 DA21 DA27 KA01

Claims (10)

[Claims] An antenna terminal provided on a substantially square module substrate, a dual antenna switch to which a signal of the antenna terminal is connected to a common terminal, and a dual antenna switch connected to one terminal of the dual antenna switch. A dual band receiving unit connected to the other terminal of the dual antenna switch, wherein the dual band transmitting unit includes a transmission signal input terminal and a signal input to the transmission signal input terminal. Is connected to one input, the other input is connected to the output of a PLL synthesizer, the output of this modulator is supplied to one input, and the other input is the PLL synthesizer. Offset-controlled voltage-controlled oscillator whose output is connected via a local voltage-controlled oscillator, and And a power amplifier connected between the output of the dual antenna switch and one terminal of the dual antenna switch, and the dual band receiving unit outputs a signal output from the other terminal of the dual antenna switch. While being supplied to one input, the output of the PLL synthesizer is connected to the other input via the local voltage-controlled oscillator, and the output of the reception mixer is supplied to one input. The other input includes a detector connected to the output of the PLL synthesizer, and a reception signal output terminal connected to the output of the detector. The antenna terminal is provided near one corner of the module substrate. A two-way communication module with a ground on both sides sandwiching this corner. 2. A transmission signal input terminal, a reception signal output terminal, and a PL
2. The bidirectional communication module according to claim 1, further comprising a digital signal terminal input to the L synthesizer. 3. The bidirectional communication module according to claim 2, wherein the module substrate has an electrode terminal formed on a side surface. 4. A ground terminal is formed on one side surface of the module substrate on the entire surface, and a transmission voltage control oscillator of an offset system, a power amplifier, and a dual antenna switch are arranged along this side surface in this order. 2. The bidirectional communication module according to claim 1, wherein the transmission voltage controlled oscillator and the power amplifier are separated by a ground pattern. 5. A local voltage controlled oscillator is arranged near one side on which the dual antenna switch is mounted, and near the other side, and a PLL synthesizer is provided on the other side opposed to the transmission voltage controlled oscillator. The bidirectional communication module according to claim 4, further comprising a reference signal terminal to be input. 6. The output of the power amplifier having the lower frequency is input to the dual antenna switch wired along the side surface of the module substrate, and the output of the power amplifier having the higher frequency is output. 5. The bidirectional communication module according to claim 4, wherein said output is wired between opposing surfaces of said power amplifier and said dual antenna switch. 7. The bidirectional communication module according to claim 6, wherein the output having the higher frequency is provided on an inner layer of the module substrate, and a ground plane is provided between the inner layer and the surface. 8. A ground pattern is provided between a power amplifier and the dual antenna switch, and a ground pattern is provided between an output having a higher frequency and an output having a lower frequency. 5. The two-way communication module according to 4. 9. The two-way communication module according to claim 4, wherein a shield case is provided on the module substrate, and the top surface of the shield case is bent to form a compartment. 10. The two-way communication module according to claim 9, wherein the transmission voltage controlled oscillator, the dual antenna switch, and the local voltage controlled oscillator are respectively arranged in separate compartments.