KR0138382Y1 - Delay amplifier - Google Patents

Abstract

The present invention relates to a delay amplifier, comprising a forward circuit (1) and a reverse circuit (2), a local oscillation amplifier (3) and an automatic gain controller (17) in a mobile communication wireless repeater, the forward circuit (1) A splitter 12 is connected between the intermediate frequency amplifier 11 and the second mixer 13, and the surface acoustic wave bandpass filter 10 'and the intermediate frequency amplifier 12 in the reverse circuit 2. '2' between the two synthesizers (11 ') and further comprises a bidirectional coupler (4) to the local oscillator (3), the bidirectional coupler (4) and the divider (12) and forward delay amplifier (30) ) Is connected to the reverse delay amplifier 40, but the automatic gain controller 17 is connected to the reverse delay amplifier 40, and the diversity and delay amplifiers are configured in the forward circuit and the reverse circuit to eliminate the damage caused by the multipath. Mitigates the signal received from the base station to within the specified strength and SNR. And minimize interference from each other to ever new, a delay amplifier for diversity reception in a mobile communication wireless repeater to maintain a secure, able to expand to clean and Gay to a number of subscriber communication capacity of the system as much as possible.

Description

Delay Amplifier for Diversity Transmission in Mobile Radio Repeater

1 is a block diagram of a mobile communication wireless repeater including a delay amplifier for diversity transmission reception of the present invention.

2 is a block diagram of a local oscillation amplifier.

3 is a view for explaining the operation of the forward circuit.

4 is a diagram for explaining the operation of the reverse circuit.

5 is a view for explaining the operation of the automatic gain regulator.

6 is a block diagram of a forward delay amplifier for diversity transmission reception in a mobile communication wireless repeater of the present invention.

7 is a block diagram of a reverse delay amplifier for diversity transmission and reception in a mobile communication wireless repeater of the present invention.

* Explanation of symbols for main parts of the drawings

1: forward circuit 2: reverse circuit

3: local oscillation amplifier 4,4 ', 4: bidirectional coupler

5,5 ', 14,14', 34,41: Band pass filter 6,6 ', 9,9', 42,45: High frequency amplifier

7,7 ': 1st mixer 8,8', 44: intermediate frequency bandpass filter

10,10 ', 31,46,48: Surface acoustic wave bandpass filter

11,12 ', 32,47: intermediate frequency amplifier

11 ': 2 synthesizer 12,20,21,21', 24,24 ': 2 divider

13,13 ': 2nd mixer 15,15', 35: power amplifier

16,16 ': Circular splitter 17: Automatic gain controller

18: crystal oscillation means 19: phase synchronization circuit

22,22 ', 23,23': Buffer Amplifier 33,43: Mixer

30: forward delay amplifier 40: reverse delay amplifier

The present invention relates to a delay amplifier, and more particularly, to an amplifier for transmitting and receiving a diver seat in a mobile communication wireless repeater.

The most important problem in mobile communication is how to maximize and secure the capacity of the system within a given band.

In order to solve this problem, first, the power in the forward and reverse directions is controlled by the signal of the base station, and the signal input to the base station from all mobile stations is input within the specified intensity and signal-to-noise ratio (SNR) to prevent interference between channels. Method of minimization (prescribed as invented by the inventor of the present invention).

Second, how to deal with and overcome signals caused by multipath and fading by scattered waves.

The present invention minimizes the interference between channels, maximizes the capacity of the system, and improves the communication quality by receiving and processing signals caused by scattered waves such as multipath and fading, which are problems. It is proposed to maintain a cheerful and pleasant communication for a number of mobile subscribers.

(1) multipath

Radio waves in the city consisting of natural obstacles and artificial obstacles are multipaths formed by reflections and scattering by natural obstacles (mountains, hills, rivers, trees, etc.) around the aerial of the base station and the mobile station. There are multipaths formed by reflection and scattering by obstacles (eg grievances, poles, electric wires, etc.).

Since the mobile station or personal terminal needs flexibility in direction, it uses an omni-directional aerial to receive signals coming from all directions, thereby effectively coping with multipath by reflection and scattering.

However, the aerial of the base station is limited in directivity to form a multipath between the base station and the mobile station by reflection and scattering by the entire structure of the adjacent ground.

(2) Rayleigh fading by multipath

Numerous multi-paths generated by reflectors and scatterers such as natural and artificial obstacles generate radio interference patterns, forming Rayleigh fading with peak and depression of the electric field strength, and the difference in signal strength between peak and depression It can also exceed 30db.

(3) multipath delay

The multipath of the mobile communication channel is the first signal of the direct path propagating on the line of sight, and the next is the aggregation of the low-latency paths that are reflected from objects close to the mobile station. It consists of a path of signals that have gone through a long delay path. The strength of the signal is also reduced by the square ratio of the distance to the receiver.

In order to minimize the harmful effects of the multipath as described above, the present invention is to provide diversity reception and delay amplifier.

(a) Diversity reception

Multipath transmission from the mobile station will cause fading near the base station aerial, which changes over time due to the positional movement of the mobile station. In order to alleviate such adverse conditions, the aerial of the base station is installed in a diversity manner.

The base station receives signals in two aerials at two different points that are not correlated with fading in accordance with the diversity scheme. The signals thus received can be combined optimally, and the effect is further enhanced by increasing the number of diversity.

In order to eliminate the correlation between fading patterns, the separation distance between the diversity aerial lines should depend on the angle of the direction in which the multipath received signal arrives, and an experimental value of about 200 meters is observed at a delay of 1 μs in a typical city center.

(b) detection and combining of multipath signals

The RAKE RECEIVER with three independent correlation detectors receives multipath signals to track and detect peaks, and the smaller peaks are recognized as errors and eliminated to optimally combine diversity reception. Let's do it.

In summary, multipath can be relaxed with transmit power control and diversity reception, and transmit power can be reduced by adaptive control to compensate for fading. Diversity reception also optimally combines the signals resolved by the three independent correlation detectors by resolving the delayed signals by retrieving the time delay from the rake receiver for multipath signals received on two or more independent channels. .

In consideration of the above description, the diversity of the forward and reverse circuits of the repeater, together with the delay amplifier, alleviates the harmful effects of the multipath, so that the signal received from the base station can be received within the specified strength and signal-to-noise ratio (SNR). By minimizing mutual interference, the system can be secured and expanded to the maximum.

The present invention includes a band pass filter (5), a high frequency amplifier (6) and a first mixer (7), an intermediate frequency band pass filter (8), a high frequency amplifier (9), a surface acoustic wave band pass filter (10), and an intermediate frequency amplifier. (11) a forward circuit (1) formed by sequentially connecting a second divider (12), a second mixer (13), a band pass filter (14), a power amplifier (15), and a circulator (16); A band pass filter (5 '), a high frequency amplifier (6') and a first mixer (7 '), an intermediate frequency band pass filter (8'), a high frequency amplifier (9 '), a surface acoustic wave band pass filter (10'), 2 synthesizer 11 ', intermediate frequency amplifier 12', second mixer 13 ', bandpass filter 14', power amplifier 15 'and circular splitter 16' A reverse circuit 2; The phase oscillator 19 and the two divider 20 are sequentially connected to the crystal oscillation means 18, and the two dividers 21 and 21 'are connected to the two divider 20, respectively. 21 is connected to the buffer amplifier 22, the buffer amplifier 23 is connected to the divider 24, and the buffer amplifier 23 'is connected to the buffer amplifier 23' A local oscillation amplification part 3 formed by connecting a divider 24 'through 22'; An automatic gain controller 17 is provided so that each of the output terminals of the buffer amplifiers 22 and 23 'in the local oscillation amplifier 3 is provided in the forward circuit 1 and the reverse circuit 2, respectively. It is connected to one input terminal of each of the first mixer 7 and the second mixer 13 ', and each of the one output terminals of the dividers 24 and 24' in the local oscillation amplifier 3 is The power amplifier 15 of the forward circuit 1, connected to one input terminal of each of the second mixer 13 and the first mixer 7 in each of the forward circuit 1 and the reverse circuit 2; By connecting the input terminal of the automatic gain controller 17 to the one output terminal M, the one output terminal of the automatic gain controller 17 is the one input terminal K of the intermediate frequency amplifier 11 in the forward circuit 1. ) And a mobile tube configured by connecting the one output terminal of the automatic gain controller 17 to the one input terminal Q of the high frequency amplifier 9 'in the reverse circuit 2. In a wireless repeater, the reverse circuit (2) is connected to the output terminal of the bidirectional coupler (4 ') by connecting the input terminal of the bidirectional coupler (4') to the output terminal of the cyclic splitter (16) in the forward circuit (1). In addition to connecting the input terminal of the band pass filter (5 ') to the output terminal of the cyclic splitter (16') in the reverse circuit (2) by connecting the input terminal of the bidirectional coupler (4) 4) Output terminal The input terminal of the band pass filter 5 in the forward circuit 1 is connected, and the one output terminal of the divider 12 in the forward circuit 1 and the local oscillation amplifier ( The forward delay amplifier 30 is connected to the one output terminal of the divider 24 in 3) to connect the input terminal of the bidirectional coupler 4 to the output terminal of the forward delay amplifier 30 and the bidirectional coupler ( Output terminal of 4) and the one output of the double divider 24 'in the local oscillation amplifier 3; Terminal reverse delay amplifier 40 is connected to the output terminal of the reverse delay amplifier 40 is characterized in that it is configured by connecting the one input terminal of the two synthesizer (11 ') in the reverse circuit (2).

In addition, the forward delay amplifier 30 is connected to the surface acoustic wave band pass filter 31, and the intermediate frequency amplifier 32, the mixer 33, the band pass filter 34, the power amplifier 35, and the cyclic splitter 36. And sequentially connect the input terminals of the surface acoustic wave band pass filter 31 in the forward delay amplifier 30 to connect one output terminal of the divider 12 in the forward circuit 1, and the forward delay A circulating splitter in the forward delay amplifier 30 is connected to the one input terminal of the mixer 33 in the amplifier 30 and the one output terminal of the double divider 24 in the local oscillation amplifier 3. It is characterized in that it is configured by connecting the input terminal of the bidirectional coupler (4) to the output terminal of (36).

The reverse delay amplifier 40 is a band pass filter 41, a high frequency amplifier 42, a mixer 43, an intermediate frequency band pass filter 44, a high frequency amplifier 45, and a surface acoustic wave band pass filter 46. , The intermediate frequency amplifier 47 and the surface acoustic wave band pass filter 48 are connected in sequence, and the output terminal of the bidirectional coupler 4 is connected to the input terminal of the band pass filter 41 of the reverse delay amplifier 40. Connect one output terminal of the divider 24 'in the local oscillation amplifier 3 to one input terminal of the mixer 43 in the reverse delay amplifier 40, and the reverse delay amplifier 40 It is characterized in that it is configured by connecting one input terminal of the two synthesizer (11 ') in the reverse circuit (2) to the output terminal of the surface acoustic wave band pass filter (48).

Hereinafter, the operation and effects of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a main part of a mobile communication wireless repeater including a delay amplifier for diversity reception according to the present invention, and includes a bidirectional coupler (4), (4 '), (4), a forward circuit (1), and a reverse circuit. (2), local oscillation amplifier (3), automatic gain controller (17), forward delay amplifier (30), reverse delay amplifier (40), which is referred to as the bidirectional coupler (4) in the bidirectional coupler (4) ') Or the direction to the bidirectional coupler 4, the reverse direction refers to the direction from the bidirectional coupler 4' or bidirectional coupler (4) to the bidirectional coupler (4).

The forward circuit 1 includes a band pass filter 5, a high frequency amplifier 6, a first mixer 7, an intermediate frequency band pass filter 8, a high frequency amplifier 9, a surface acoustic wave band pass filter 10, The intermediate frequency amplifier 11, the divider 12, the 2nd mixer 13, the bandpass filter 14, the power amplifier 15, and the circulating splitter 16 are comprised.

The reverse circuit 2 has the forward circuit 1 except that the second synthesizer 11 'is used between the surface acoustic wave bandpass filter 10' and the intermediate frequency amplifier 12 'instead of the double divider 12. It is configured in the same way.

The local oscillation amplifier 3 comprises a crystal oscillation means 18, a phase synchronizing circuit 19, two dividers 20, 21, 21, 24, 24 'and a buffer amplifier 22. ), (22 '), (23), and (23'). The automatic gain controller 17 is composed of a linear integrated circuit and has one input terminal and three output terminals.

2 is a configuration diagram of the local oscillation amplifier 3.

The oscillation frequency signal generated by the crystal oscillation means 18 for oscillating the local oscillation frequency is passed through a phase synchronization circuit 19 composed of an integrated circuit (IC) incorporating a phase detector, a voltage controlled oscillator, and a program counter. It is applied to a divider 20 composed of a band hybrid (HIBRID) circuit and divided and output.

One of the divided outputs is applied to a divider 21 for supplying a local oscillation frequency signal to the forward circuit 1, and the other output is a divider for supplying a local oscillation frequency to the reverse circuit 2. It becomes a signal applied to 21 '.

The signals of the local oscillation frequency applied to the divider 21 are divided into two and are input to the buffer amplifiers 22 and 23 which buffer the mixing period with the oscillator and simultaneously perform the amplification, and amplify them to a predetermined voltage. The output of the amplifier 22 is applied to the first mixer 7 of the forward circuit 1.

The output of the buffer amplifier 23 is again divided into two dividers 24 and applied to the second mixer 13 of the forward circuit 1 and the mixer 33 of the forward delay amplifier 30, respectively.

One output of the two divider 20 is for supplying a local oscillation frequency to the reverse circuit 2 and is applied to the two divider 21 'and is outputted to the buffer amplifiers 22' and 23 ', respectively. The output of the buffer amplifier 23 'is input to the second mixer 13' of the reverse circuit 2, and the output of the buffer amplifier 22 'is again input to the divider 24' and bisected. One output is applied to the first mixer 7 'of the reverse circuit 2. Another output is applied to mixer 43 of reverse delay amplifier 40.

3 is a view for explaining the operation of the forward circuit (1).

The signal transmitted from the base station is transmitted to the aerial equipment of the repeater and input to the terminal A of the bidirectional coupler 4 and outputted from the bidirectional coupler 4 through the terminal J of the forward circuit 1. Only the band necessary in 5) is passed, amplified to a predetermined voltage by the high frequency amplifier 6 and input to the first mixer 7.

On the other hand, the signal of the local oscillation frequency inputted to the terminal D is input to the first mixer 7 and mixed with the output signal of the high frequency amplifier 6 to pass a new intermediate frequency band pass for eliminating numerous harmonics. It outputs to the filter (8), extracts and passes only the required band, and amplifies in the high-frequency amplifier (9) to compensate for the damage caused by the frequency conversion and insertion of the filter, and to secure the required level (LEVEL), which is excellent for removing adjacent frequencies. Only the necessary band is passed in the surface acoustic wave band pass filter 10 having the performance and delay function, and is amplified to a predetermined voltage in the intermediate frequency amplifier 11 to obtain the insertion loss of the filter and the required voltage. Is entered.

The divider 12 is a splitter composed of a broadband hybrid circuit having a function of dividing an input signal, and divides the input signal into two output signals, one output is input to the second mixer 13, The other output is input to the forward delay amplifier 30.

On the other hand, the signal of the local oscillation frequency output from the local oscillation amplifier 3 is input to the second mixer 13, mixed with the signal input from the divider 12, reduced to the original frequency and outputted and band Only the band required by the pass filter 14 is passed through, and the power amplifier 15 outputs predetermined power.

In addition, the automatic gain controller 17 inputs a DC component that detects and detects a part of the output power of the required power amplifier, and adjusts the gain to terminals K, Q, and R of the automatic gain controller 17. Output the generated signal. The output signal from the terminal K is input to the intermediate frequency amplifier 11 to control the power of the power amplifier 15. Power output from the power amplifier 15 is output through the cyclic splitter 16, is applied to the bidirectional coupler (4 ') is to send a signal to the aerial equipment through the terminal (B).

4 is a diagram for explaining the reverse circuit 2. As shown in FIG.

The signal transmitted from the mobile station is transmitted to the aerial equipment of the repeater and input to the terminal B of the bidirectional coupler 4 ', and its output signal is passed through only the band required by the bandpass filter 5' so that the high frequency amplifier 6 Amplified to the required voltage at ') and input to the first mixer 7'. The signal of the local oscillation frequency output from the local oscillation amplifier 3 is input to the first mixer 7 ', mixed with the output signal of the intermediate frequency amplifier 6', and outputs a mixed signal. Only the bands required by the bandpass filter (8 ') are passed and amplified by the high frequency amplifier (9'), which compensates for the insertion loss of the filter and amplifies to the required voltage, and has excellent efficacy and inherent in eliminating interference of adjacent frequencies. A surface acoustic wave bandpass filter 10 'having a delay time is input to the two-synthesizer 11' composed of a broadband hybrid (HYBRID) circuit. The second synthesizer 11 'is inputted with the intermediate frequency signal of the reverse delay amplifier 40, mixed with the output signal of the surface acoustic wave bandpass filter 10', and output from the intermediate frequency amplifier 12 '. After being amplified by the voltage, the signal of the local oscillation frequency inputted to the second mixer 13 'and output from the local oscillation amplifier 3 and the second mixer 13' are mixed with each other, reduced to the original frequency, and then output. Only the band required by the bandpass filter 14 'is passed, and the amplified by the predetermined power in the power amplifier 15' and input to the bidirectional combiner 4 via the cyclic splitter 16 'and the terminal A It is applied to the aerial equipment through the transmission to the base station.

5 is a view for explaining the automatic gain controller 17.

The input signal of the automatic gain regulator 17 is a direct current component that detects and detects a part of the power output from the power amplifier 15 of the forward circuit 1, and is input to the terminal M as shown in FIG. Output from K), (Q) and (R) respectively.

The output of the stage K is input to the intermediate frequency amplifier 11 of the forward circuit 1, the output of the terminal Q is input to the intermediate frequency amplifier 9 'of the reverse circuit 2, and the terminal R ) Is input to the intermediate frequency amplifier 45 of the reverse delay amplifier 40.

In this way, the automatic gain controller 17 can simultaneously control the output power of the reverse circuit 2 and the output power of the reverse delay amplifier 40 by the power output from the power amplifier 15 of the forward circuit 1. Will be.

6 is a configuration diagram of a forward delay amplifier 30 for diversity transmission and reception in a mobile communication repeater of the present invention.

The signal transmitted from the base station input to the forward circuit (1) is divided into two dividers 12 and outputted, one of the divided signals is input to the forward delay amplifier (30), excellent efficiency in eliminating interference of adjacent frequencies And the band is maintained in the surface acoustic wave band pass filter 31 having an inherent delay time, and only the necessary band is passed to compensate for insertion loss due to the filter in the high frequency amplifier 32 and to the required voltage level LEVEL. After being amplified, it is input to the mixer 33 and mixed with the signal of the local oscillation frequency output from the local oscillation amplifier 3, and outputs a signal reduced to the original frequency. Only the band required by the band pass filter 34 is output. Passage is amplified to a predetermined power in the power amplifier 35 and the diversity of the repeater through the bidirectional coupler (4) via the connection point (T) of the cyclic splitter 36 and the forward delay amplifier 30 To be applied to the aerial plant is about 0.5μs delayed signal than the signal induced in the antenna equipment of the forward circuit (1) is to be sent to the mobile station.

7 is a block diagram of a reverse delay amplifier 40 for diversity transmission and reception in a mobile communication wireless repeater of the present invention.

The signal transmitted from the mobile station is transmitted to the diversity aerial equipment of the repeater, applied to the connection terminal C of the bidirectional coupler 4, and passed through the band pass filter 41 to the required voltage level LEVEL. Is mixed with the local oscillation frequency signal output from the local oscillation amplification section 3 and output as an intermediate frequency signal, and the band is maintained in the intermediate frequency band pass filter 44 and is required. Only the frequency is passed and amplified and output by the high frequency amplifier 45 for compensating for the frequency conversion loss and insertion loss of the filter and for amplifying to the required voltage.

In addition, the voltage of the DC component output from the automatic gain controller 17 controls the power input to and output from the high frequency amplifier 45 of the reverse delay amplifier 40.

The signal output from the high frequency amplifier 45 is input to the surface acoustic wave bandpass filter 46 having excellent efficacy and inherent delay time for eliminating interference of adjacent frequencies, and the band is maintained and output with the necessary band and delay time. The surface acoustic wave bandpass filter (48) is amplified by a high frequency amplifier (47) to compensate for the loss caused by the insertion of the filter and to obtain the required voltage. Signal output from the reverse delay amplifier 40 and input to the second synthesizer 11 'of the reverse circuit 2, and mixed with the output signal of the surface acoustic wave band pass filter 10'. Is output to the high frequency amplifier 12 '.

Thus, the output signal of the reverse delay amplifier 40 induced in the diversity aerial equipment is delayed by about 0.5 s from the signal induced in the aerial equipment of the reverse circuit 2, and is mixed by the two mixers 13 '. Is sent to the base station by the aerial equipment.

The delay amplifier for diversity transmission and reception in the present invention mobile communication wireless repeater acts as described above. (1) The signal of the base station input to the mobile communication repeater is input to the repeater and the surface acoustic wave bandpass filter 10 of the forward circuit 1 is transmitted. The delay time of about 0.5μs minimizes the interference between the signal transmitted from the base station and the signal transmitted from the repeater, and reduces the fading since the transmission power can be adaptively controlled by the base station signal.

(2) The signal distributed from the divider 12 of the forward circuit 1 is inputted to the forward delay amplifier 30 to transmit a signal delayed 0.5 s by the surface acoustic wave bandpass filter 31 in diversity. It is possible to minimize the interference between the signal originating from the signal and the signal originating from the forward circuit 1 of the repeater, to increase the mobile radius of the mobile station, and to reduce fading.

(3) The multipath signal transmitted from the mobile station of the reverse circuit (2) is input to the repeater and amplified by the surface acoustic wave bandpass filter (10 ') with a delay time of 0.5 s, and the diver of the reverse delay amplifier (40). The signal received from the mobile station multipath is synthesized by the two surface acoustic wave band pass filters 46 and 48 and delayed by the two synthesizer 11 'and transmitted to the base station by the signal received from the reverse circuit 2. Therefore, the three correlation detectors can be analyzed, resolved, and optimally combined.

As such, the present invention mitigates the harmful effects of multipath by configuring diversity and delay amplifiers in the forward and reverse circuits, and minimizes mutual interference by receiving signals received from the base station within a specified strength and SNR. It is possible to secure and expand the capacity of maximally to maintain pleasant and cheerful communication for many subscribers.

Claims (3)

A bandpass filter (5), a high frequency amplifier (6) and a first mixer (7), an intermediate frequency bandpass filter (8), a high frequency amplifier (9), a surface acoustic wave bandpass filter (10), an intermediate frequency amplifier (11) A forward circuit (1) formed by sequentially connecting a divider (12), a second mixer (13), a band pass filter (14), a power amplifier (15), and a circulator (16); A band pass filter (5 '), a high frequency amplifier (6') and a first mixer (7 '), an intermediate frequency band pass filter (8'), a high frequency amplifier (9 '), a surface acoustic wave band pass filter (10'), 2 synthesizer 11 ', intermediate frequency amplifier 12', second mixer 13 ', bandpass filter 14', power amplifier 15 'and circular splitter 16' A reverse circuit 2; The phase oscillator 19 and the two divider 20 are sequentially connected to the crystal oscillation means 18, and the two dividers 21 and 21 'are connected to the two divider 20, respectively. 21 is connected to the buffer amplifier 22, the buffer amplifier 23 is connected to the divider 24, and the buffer amplifier 23 'is connected to the buffer amplifier 23' A local oscillation amplification part 3 formed by connecting a divider 24 'through 22'; A first gain in each of the forward circuit (1) and the reverse circuit (2) is provided with an automatic gain controller (17), each of the output stages of the buffer amplifiers (22) and (23 ') in the local oscillation amplifier (3). It is connected to one input terminal of each of the mixer 7 and the second mixer 13 ', and each of the one output terminals of the dividers 24 and 24' in the local oscillation amplifier 3 is connected to the forward circuit ( 1) and one output terminal M of the power amplifier 15 in the forward circuit 1 connected to one input terminal of each of the second mixer 13 and the first mixer 7 in each of the reverse circuit 2; ) By connecting the input terminal of the automatic gain controller 17 to the one input terminal of the intermediate frequency amplifier 11 in the forward circuit 1 and to the automatic output of the automatic gain controller 17. In the mobile communication wireless repeater configured by connecting one output terminal of the gain regulator 17 to one input terminal Q of the high frequency amplifier 9 'in the reverse circuit 2. Then, the band pass in the reverse circuit 2 is connected to the output terminal of the bidirectional coupler 4 'by connecting the input terminal of the bidirectional coupler 4' to the output terminal of the cyclic splitter 16 in the forward circuit 1. The input terminal of the bidirectional coupler 4 is connected to the output terminal of the circulating splitter 16 'in the reverse circuit 2 and the output terminal of the bidirectional coupler 4 is connected to the input terminal of the filter 5'. The input terminal of the bandpass filter 5 in the forward circuit 1 is connected, and the one output terminal of the divider 12 in the forward circuit 1 and the double divider 24 in the local oscillation amplifier 3. The forward delay amplifier 30 is connected to one output terminal of the coupling unit, and the input terminal of the bidirectional coupler 4 is connected to the output terminal of the forward delay amplifier 30, and the output terminal of the bidirectional coupler 4 and the local oscillation amplifier ( 3) connect the reverse delay amplifier 40 to the input / output terminal of the divider 24 ' Delay amplifier for diversity reception to the output terminal of the delay direction amplifier 40 in a mobile radio communication repeater, which in one aspect consists of hayeoseo connected to the input of the second combiner (11 ') in said reverse circuit (2). The forward delay amplifier (30) according to claim 1, wherein the forward delay amplifier (30) is added to the surface acoustic wave band pass filter (31), the intermediate frequency amplifier (32), the mixer (33), the band pass filter (34), the power amplifier (35), and the circulating splitter. (36) are sequentially connected, and one output terminal of the divider (12) in the forward circuit (1) is connected to the input terminal of the surface acoustic wave bandpass filter (31) in the forward delay amplifier (30), A circulating powder in the forward delay amplifier 30 is connected to one output terminal of the divider 24 in the local oscillation amplifier 3 to one input terminal of the mixer 33 in the forward delay amplifier 30. A delay amplifier for diversity transmission and reception in a mobile communication wireless repeater, characterized in that it is configured by connecting the input of the bidirectional coupler (4) to the output of the discard (36). The reverse delay amplifier (40) is a band pass filter (41), a high frequency amplifier (42) and a mixer (43), an intermediate frequency band pass filter (44), a high frequency amplifier (45), and a surface acoustic wave band pass. The filter 46, the intermediate frequency amplifier 47, and the surface acoustic wave band pass filter 48 are connected in sequence, and the bidirectional coupler 4 is connected to an input terminal of the band pass filter 41 in the reverse delay amplifier 40. And an output terminal of the second divider 24 'in the local oscillation amplifier 3 to the one input terminal of the mixer 43 in the reverse delay amplifier 40, and the reverse delay Diversity transmission and reception in a mobile communication wireless repeater, comprising connecting one input terminal of the two synthesizer 11 'in the reverse circuit 2 to an output terminal of the surface acoustic wave bandpass filter 48 in the amplifier 40. Delay Amplifiers