A multi-frequency multi-working mode dual-circular polarization microwave network

Abstract

The application provides a multi-frequency-point multi-working-mode dual-circular-polarization microwave network, which comprises an antenna feed source, a circular polarizer, a left-handed polarization conversion channel and a right-handed polarization conversion channel connected with the circular polarizer, a circulator connected with the left-handed polarization conversion channel, filters connected with two ports of the circulator and the right-handed polarization conversion channel, and low-noise amplifiers and power amplifiers connected with the filters respectively; the working modes comprise a same-frequency transceiving time-sharing working mode and a different-frequency transceiving simultaneous working mode; the application realizes the integration of the same-frequency transceiving half-duplex mode and the different-frequency transceiving full-duplex mode in one microwave network, and realizes the reception and emission of dual-circular-polarization electromagnetic waves through the circular polarizer; the network has few ports, low complexity and high integration degree; through the integration of multiple working modes, the application reduces the number of low-noise amplifiers and power amplifiers, and reduces the power consumption, volume, weight, space and cost of the system.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, in particular to a multi-frequency point multi-working mode dual circular polarization microwave network. BACKGROUND

[0002] With the development of microwave communication technology, the combination and integration of multi-frequency point transceiving duplex and single-frequency point time-sharing transceiving half-duplex mode of microwave network are increasingly required. Microwave network is a key component for realizing the transmission and reception of radio frequency signals. Generally, microwave network only realizes the design of one working mode, which cannot meet the requirements of microwave development.

[0003] Therefore, there is a need for a microwave network that integrates multiple working modes and reduces the complexity of the microwave network. SUMMARY

[0004] The present application is to solve the problem of single working mode of microwave network, and provides a multi-frequency point multi-working mode dual circular polarization microwave network, which realizes the integration of same frequency time-sharing transceiving half-duplex and different frequency transceiving full-duplex two working modes in one microwave network, and realizes the reception and transmission of dual circular polarization electromagnetic waves through a circular polarizer. The network has fewer ports, low complexity and high integration degree.

[0005] The present application provides a multi-frequency point multi-working mode dual circular polarization microwave network, which comprises a connected antenna feed source, a circular polarizer, a left-handed polarization conversion channel and a right-handed polarization conversion channel connected to the circular polarizer, a circulator connected to the left-handed polarization conversion channel, and a filter connected to both ports of the circulator and a low noise amplifier and a power amplifier connected to the filter, respectively.

[0006] The antenna feed source time-sharing receives and transmits f1 frequency point left-handed polarization signals. The antenna feed source can also receive f2 frequency point left-handed polarization signals and simultaneously transmit f3 frequency point right-handed polarization signals. The circulator isolates the received and transmitted signals.

[0007] The filter comprises a filter body, a first port, a second port and a third port connected to one side of the filter body, and a fourth port and a fifth port connected to the other side of the filter body. The first port and the second port are connected to the left-handed polarization conversion channel through the circulator, the third port is connected to the right-handed polarization conversion channel, the fourth port is connected to the low noise amplifier, and the fifth port is connected to the power amplifier. The filter body can filter f1 frequency point, f2 frequency point and f3 frequency point. The filter body can perform receive blocking filtering and transmit blocking filtering.

[0008] The working mode of the multi-frequency point multi-working mode dual circular polarization microwave network includes a same frequency transceiving time-sharing working mode and a different frequency transceiving simultaneous working mode.

[0009] In the same frequency transceiving time-sharing operation mode, when the f1 frequency point left-handed polarization signal is received, the power amplifier is disabled, and the filtering range of the filter body is adjusted to the range including the f1 frequency point; the antenna feed receives the f1 frequency point left-handed polarization signal and outputs it to the circular polarizer to be converted into a linear polarization wave and output to the left-handed polarization conversion channel, and then sequentially passes through the circulator, enters the filter body through the first port, and is filtered to be output to the low noise amplifier through the fourth port; the low noise amplifier amplifies the radio frequency signal and sends it to the receiver port of the signal machine; when the f1 frequency point left-handed polarization signal is transmitted, the low noise amplifier is disabled, the filter body has the filtering range of the f1 frequency point, and the power amplifier receives the radio frequency signal transmitted by the signal machine, amplifies the power, and outputs it to the filter body through the fifth port; the filter body is filtered to be output to the circulator from the second port, and then enters the left-handed polarization conversion channel, and the electromagnetic wave is converted into a left-handed circular polarization wave by the circular polarizer to obtain the f1 frequency point left-handed polarization signal, which is output through the antenna feed;

[0010] In the different frequency transceiving simultaneous operation mode, when the f2 frequency point left-handed polarization signal is received and the f3 frequency point right-handed polarization signal is transmitted, the low noise amplifier and the power amplifier are both enabled, the filter body is adjusted to the filtering range of the f2 frequency point and the f3 frequency point, and the transmitting stop band is the f3 frequency point range and the receiving stop band is the f2 frequency point range; the f2 frequency point left-handed polarization signal is received by the antenna feed, enters the circular polarizer for polarization conversion, passes through the left-handed polarization conversion channel, enters the circulator, and enters the filter body through the first port for receiving stop filtering, and then enters the low noise amplifier through the fourth port for amplification and transmission to the receiver port of the signal machine; the signal machine transmits the f3 frequency point radio frequency signal, which is amplified by the power amplifier and then enters the filter body through the fifth port for transmitting stop filtering, and is output from the third port to the right-handed polarization conversion channel, and then the electromagnetic wave is converted into a right-handed circular polarization wave by the circular polarizer, and the f2 frequency point left-handed polarization signal is output through the antenna feed.

[0011] The multi-frequency point and multi-operation mode double circular polarization microwave network, as a preferred mode, the lower sideband of the f3 frequency point is located outside the upper sideband 100MB of the f2 frequency point band, or the upper sideband of the f3 frequency point is located outside the lower sideband -100MB of the f2 frequency point band.

[0012] The f1 frequency point left-handed polarization signal, the f2 frequency point left-handed polarization signal and the f3 frequency point right-handed polarization signal are all circular polarization waves.

[0013] The multi-frequency point and multi-operation mode double circular polarization microwave network, as a preferred mode, an amplitude limiter is arranged in the low noise amplifier to prevent the received and transmitted signals from being damaged.

[0014] The multi-frequency point multi-working mode dual-circular polarization microwave network, as a preferred mode, the filter body is a band-pass filter, and the out-of-band rejection ratios of the filter body for receiving blocking filtering and transmitting blocking filtering are both greater than 70 dB.

[0015] The multi-frequency point multi-working mode dual-circular polarization microwave network, as a preferred mode, in the simultaneous working mode of different frequency receiving and transmitting, the method for preventing the receiving channel from being interfered by the transmitting signal is that: the output P-1 of the low-noise amplifier is greater than the signal strength of the transmitting signal coupled to the receiving channel, the isolation parameters of the left-handed polarization conversion channel and the right-handed polarization conversion channel meet the requirement of receiving-transmitting isolation, and the filter has the ability of transmitting blocking filtering and receiving blocking filtering and meets the requirement of receiving-transmitting isolation.

[0016] The multi-frequency point multi-working mode dual-circular polarization microwave network, as a preferred mode, the low-noise amplifier is greater than or equal to -1 dBm, and the amplification gain is greater than or equal to 25 dB.

[0017] The multi-frequency point multi-working mode dual-circular polarization microwave network, as a preferred mode, the output power of the power amplifier is greater than 47 dBm.

[0018] The multi-frequency point multi-working mode dual-circular polarization microwave network, as a preferred mode, the isolation of the left-handed polarization conversion channel and the right-handed polarization conversion channel is greater than 15 dB.

[0019] The multi-frequency point multi-working mode dual-circular polarization microwave network, as a preferred mode, the receiving-transmitting isolation of the circulator is greater than or equal to 18 dB.

[0020] The multi-frequency point multi-working mode dual-circular polarization microwave network, as a preferred mode, the multi-frequency point multi-working mode dual-circular polarization microwave network is in the form of a waveguide, and the left-handed polarization conversion channel and the right-handed polarization conversion channel are both waveguide feed lines.

[0021] The technical scheme of the present application is: a multi-frequency point multi-working mode dual-circular polarization microwave network, which covers a same-frequency receiving-transmitting time-sharing microwave network and a different-frequency receiving-transmitting simultaneous microwave network.

[0022] The multi-frequency point multi-working mode dual-circular polarization microwave network covers multiple working frequencies: a receiving-transmitting time-sharing working frequency f1 (left-handed circularly polarized wave), a receiving-transmitting simultaneous working frequency f2 (left-handed circularly polarized wave) and f3 (right-handed circularly polarized wave). The microwave network comprises: a low-noise amplifier, a power amplifier, a filter, a circulator, a set of waveguide feed lines and a circular polarizer.

[0023] In the same frequency (f1 frequency point) transceiver time-sharing mode, when the system receives a signal, the circular polarizer receives a left-handed circularly polarized wave and converts it into a linearly polarized wave to the left-handed polarization conversion channel, and then the electromagnetic wave is transmitted to the low-noise amplifier through the circulator and the filter, and the radio frequency signal is sent to the receiver port of the signal machine after being amplified by the low-noise amplifier; when the system transmits, the signal machine transmits a radio frequency signal, which is output after power amplification by the power amplifier, and the electromagnetic wave is converted into a right-handed circularly polarized wave by the circular polarizer after being transmitted to the circular polarizer through the filter and the circulator.

[0024] In the different frequency (f2, f3 frequency point) transceiver simultaneous operation mode, the circular polarizer receives the f2 frequency point left-handed circularly polarized wave and converts it into a linearly polarized wave, and then the electromagnetic wave is transmitted to the low-noise amplifier through the left-handed polarization conversion channel, the circulator and the filter, and the radio frequency signal is sent to the receiver port of the signal machine after being amplified; the signal machine transmits a f3 frequency point radio frequency signal, which is output after power amplification by the power amplifier, and the electromagnetic wave is converted into a right-handed circularly polarized wave by the circular polarizer after being transmitted to the circular polarizer through the filter.

[0025] The output P-1 of the low-noise amplifier is -1dBm, and the amplification gain is 25dB;

[0026] The output power of the power amplifier is greater than 47dBm;

[0027] The filter is a band-pass filter, and the out-of-band rejection ratio of the receiving filter and the transmitting filter is greater than 70dB;

[0028] The isolation of the left / right rotation conversion channel of the circular polarizer is greater than 15dB;

[0029] The architecture of the microwave network is in the form of a waveguide.

[0030] The present application has the following advantages:

[0031] (1) The multi-frequency point multi-working mode double circular polarization microwave network integrates the same frequency (f1 frequency point) transceiver time-sharing and different frequency (f2, f3 frequency point) transceiver simultaneous operation modes, and compared with the application of multiple single working mode microwave networks, the number of ports is reduced, and the complexity, occupied space and weight of the microwave network are reduced.

[0032] (2) The left-handed and right-handed circularly polarized waves are converted by the circular polarizer in the same microwave network, which reduces the complexity of the microwave network and reduces the number of ports of the microwave network.

[0033] (3) The present application integrates multiple working modes, reduces the number of low-noise amplifiers and power amplifiers, and reduces the power consumption, volume, weight, space and cost of the system. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 A block diagram of a multi-frequency, multi-operating-mode dual-circularly polarized microwave network;

[0035] Figure 2 This is a block diagram illustrating the principle of a multi-frequency, multi-mode dual-circular polarized microwave network with time-division multiplexing and receiving modes.

[0036] Figure 3 This is a block diagram illustrating the principle of a multi-frequency, multi-mode, dual-circular polarized microwave network with simultaneous transmission and reception at different frequencies.

[0037] Figure label:

[0038] 1. Antenna feed; 2. Circular polarizer; 3. Left-handed polarization conversion channel; 4. Right-handed polarization conversion channel; 5. Circulator; 6. Filter; 61. Filter body; 62. First port; 63. Second port; 64. Third port; 65. Fourth port; 66. Fifth port; 7. Low-noise amplifier; 8. Power amplifier. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0040] Example 1

[0041] like Figure 1 As shown, a multi-frequency, multi-operating-mode dual circular polarization microwave network includes: a low-noise amplifier 7, a power amplifier 8, a filter 6, a circulator 5, a set of waveguide feeds (left-hand circular polarization conversion channel 3 and right-hand circular polarization conversion channel 4), a circular polarizer 2, and an antenna feed 1.

[0042] like Figure 2 As shown, in the same-frequency transceiver time-division operation mode, the microwave signal flow is as follows: After the system receives a left-hand circularly polarized wave, it is converted into a linearly polarized wave by the circular polarizer 2 and sent to the left-hand circular polarization conversion channel 3. After passing through the circulator 5 to the filter 6, the electromagnetic wave is transmitted to the low-noise amplifier 7 through the receiver filtering of the filter 6 (port 1 to port 4). After being amplified by the low-noise amplifier 7, the radio frequency signal is sent to the receiver port of the signal transmitter. When the system transmits, the signal transmitter emits a radio frequency signal, which is amplified by the power amplifier 8 and output. After passing through the transmitter filtering of the filter 6 (port 5 to port 2) and the circulator 5, the electromagnetic wave is converted into a left-hand circularly polarized wave output through the left-hand circular polarization conversion channel 3 of the circular polarizer 2.

[0043] like Figure 3As shown, in the simultaneous working mode of different frequency receiving and transmitting, the microwave signal flows as follows: the system receives the left circularly polarized wave of f2 frequency point, which is converted by the circular polarizer 2, and then is transmitted to the circulator 5 through the left circularly polarized conversion channel 3, and is transmitted to the low noise amplifier 7 through the circulator 5 and the filter 6 (ports 1 to 4) after receiving and blocking filtering, and the radio frequency signal is amplified and sent to the receiver port of the signal machine; the signal machine transmits the radio frequency signal of f3 frequency point, which is output after power amplification by the power amplifier 8, and is transmitted to the right circularly polarized conversion channel 4 through the filter 6 (ports 5 to 3) after transmitting and blocking filtering, and is converted into the right circularly polarized wave by the circular polarizer 2 and is output.

[0044] In the embodiment, the output power of the power amplifier 8 is about 47 dBm; the output P-1 of the low noise amplifier 7 is -1 dBm, the amplification gain is 25 dB, and the amplitude limiting is 17 dBm; the receiving and transmitting isolation of the circulator 5 is 18 dB; the filter 6 includes receiving and blocking filtering and transmitting and blocking filtering, the ports 5 to 3 of the filter 6 are filter transmitting channel ports, the passband frequency is f3, and the out-of-band suppression capability is 70 dB (f2, f1); the ports 5 to 2 of the filter 6 are filter transmitting channel ports, the passband frequency is f1, and the out-of-band suppression capability is 70 dB (f2, f3); the ports 1 to 4 of the filter 6 are filter receiving channel ports, the passband frequency is f2, and the out-of-band suppression capability is 70 dB (f3).

[0045] In the time-sharing working mode of the same frequency (f1) receiving and transmitting, the receiving and transmitting channel isolation can only be ensured by the isolation of the circulator, and in order to prevent the receiving channel from being damaged by the high-power transmitting signal, an amplitude limiter is added in the low noise amplifier to ensure the normal working of the low noise amplifier and the channel after the low noise amplifier.

[0046] In the simultaneous working mode of different frequency receiving (f2) and transmitting (f3), in order to prevent the receiving channel from being interfered by the transmitting signal, the transmitting and blocking filtering capability and the receiving and blocking filtering capability of the filter 6 are designed to be 70 dB through the output P-1 of the low noise amplifier 7, the isolation parameters of the circular polarizer channels 3 and 4, the transmitting signal will not damage the low noise amplifier 7, and the signal coupled to the receiving channel from the transmitting signal is less than the P-1 value of the low noise amplifier 7, and the sensitivity of the system receiving channel can ensure the transmission requirement.

[0047] In the embodiment, f1 is the same frequency (f0+3) GHz receiving and transmitting, f2 is the frequency (f0-5) GHz receiving, f3 is the frequency f0 GHz transmitting, and f0 working range is 18 GHz to 30 GHz.

[0048] The transmitting and blocking filtering capability of the embodiment is: passband range: f0 GHz±100 MHz, (f0+3) GHz±100 MHz; the suppression capability at (f0-5) GHz is 70 dBc.

[0049] The stopband filter capability of the embodiment is: passband range: (f0-5) GHz±100MHz, (f0+3) GHz±100MHz; suppression capability at f0GHz is 70dBc.

[0050] The microwave network provided by the application realizes two working modes of simultaneous frequency receiving and transmitting and different frequency receiving and transmitting, and integrated design of simultaneous transmission of left and right circularly polarized electromagnetic waves.

[0051] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. A multi-frequency multi-operating mode dual-circularly polarized microwave network, characterized in that: The antenna feed (1), a circular polarizer (2), a left-handed polarization conversion channel (3) and a right-handed polarization conversion channel (4) connected with the circular polarizer (2) respectively, a circulator (5) connected with the left-handed polarization conversion channel (3), a filter (6) connected with two ports of the circulator (5) and the right-handed polarization conversion channel (4) respectively, and a low noise amplifier (7) and a power amplifier (8) connected with the filter (6) respectively; The antenna feed (1) receives and transmits left-handed polarization signals of f1 frequency points in time-sharing mode, and can also receive left-handed polarization signals of f2 frequency points and transmit right-handed polarization signals of f3 frequency points at the same time, and the circulator (5) isolates the receiving and transmitting signals; The filter (6) comprises a filter body (61), a first port (62), a second port (63) and a third port (64) connected on one side of the filter body (61), and a fourth port (65) and a fifth port (66) connected on the other side of the filter body (61), the first port (62) and the second port (63) are connected with the left-handed polarization conversion channel (3) through the circulator (5), the third port (64) is connected with the right-handed polarization conversion channel (4), the fourth port (65) is connected with the low noise amplifier (7), and the fifth port (66) is connected with the power amplifier (8); the filter body (61) can filter f1 frequency points, f2 frequency points and f3 frequency points, and can perform receiving and transmitting filtering; The working mode of the multi-frequency point multi-working mode double circular polarization microwave network includes a same frequency receiving and transmitting time-sharing working mode and a different frequency receiving and transmitting simultaneous working mode. In the same frequency transceiving time-sharing operation mode, when the f1 frequency point left-handed polarization signal is received, the power amplifier (8) is enabled to be closed, and the filter body (61) is adjusted to a filtering range including the f1 frequency point; the antenna feed (1) receives the f1 frequency point left-handed polarization signal and outputs it to the circular polarizer (2) to be converted into a linear polarization wave and output to the left-handed polarization conversion channel (3), and then sequentially passes through the circulator (5), the first port (62) enters the filter body (61) to perform receive-blocking filtering, and then is output to the low-noise amplifier (7) through the fourth port (65); after amplification by the low-noise amplifier (7), the radio frequency signal is sent to the receiver port of the signal machine; when the f1 frequency point left-handed polarization signal is transmitted, the low-noise amplifier (7) is enabled to be closed, the filter body (61) is the filtering range of the f1 frequency point, and the power amplifier (8) receives the radio frequency signal transmitted by the signal machine, performs power amplification, and then is output to the filter body (61) through the fifth port (66); after the filter body (61) performs transmit-blocking filtering, it is output from the second port (62) to the circulator (5), and then enters the left-handed polarization conversion channel (3), and then the electromagnetic wave is converted into a left-handed circularly polarized wave by the circular polarizer (2) to obtain the f1 frequency point left-handed polarization signal, and the f1 frequency point left-handed polarization signal is output through the antenna feed (1); In the different frequency transceiving simultaneous operation mode, when the f2 frequency point left-handed polarization signal is received and the f3 frequency point right-handed polarization signal is transmitted, the low-noise amplifier (7) and the power amplifier (8) are both enabled, the filter body (61) is adjusted to the filtering range of the f2 frequency point and the f3 frequency point, and the transmit-blocking bandpass is the f3 frequency point range and the receive-blocking bandpass is the f2 frequency point range; the f2 frequency point left-handed polarization signal received by the antenna feed (1) enters the circular polarizer (2) for polarization conversion, then enters the left-handed polarization conversion channel (3) and enters the circulator (5) through the first port (62), and then enters the filter body (61) for receive-blocking filtering through the fourth port (65), and then enters the low-noise amplifier (7) for amplification and is sent to the receiver port of the signal machine; the signal machine transmits the f3 frequency point radio frequency signal, which is power amplified by the power amplifier (8) and then enters the filter body (61) through the fifth port (66) for transmit-blocking filtering, and then is output from the third port (64) to the right-handed polarization conversion channel (4), and then the electromagnetic wave is converted into a right-handed circularly polarized wave by the circular polarizer (2), and the f2 frequency point left-handed polarization signal is output through the antenna feed (1).

2. The multi-frequency multi-operating mode dual-circularly polarized microwave network according to claim 1, wherein: The lower sideband of the f3 frequency point is located outside the upper sideband 100MB of the f2 frequency point, or the upper sideband of the f3 frequency point is located outside the lower sideband -100MB of the f2 frequency point; The f1 frequency point left-handed polarization signal, the f2 frequency point left-handed polarization signal, and the f3 frequency point right-handed polarization signal are all circularly polarized waves.

3. The multi-frequency multi-operating mode dual-circularly polarized microwave network of claim 1, wherein: An amplitude limiter is arranged in the low-noise amplifier (7) to prevent the received and transmitted signals from being damaged.

4. The multi-frequency multi-operating mode dual-circularly polarized microwave network of claim 1, wherein: The filter body (61) is a band-pass filter, and the out-of-band rejection ratio of the filter body (61) for both the receiving filter and the transmitting filter is greater than 70 dB.

5. The multi-frequency multi-operating mode dual-circularly polarized microwave network of claim 1, wherein: In the simultaneous operation mode of the hetero-frequency transceiving, the method for preventing the receiving channel from being interfered by the transmitting signal is: making the output P-1 of the low-noise amplifier (7) greater than the signal strength of the transmitting signal coupled to the receiving channel, making the isolation degree parameters of the left-handed polarization conversion channel (3) and the right-handed polarization conversion channel (4) meet the requirement of the transceiving isolation, and making the filter (6) have the transmitting filter capability and the receiving filter capability and meet the requirement of the transceiving isolation.

6. The multi-frequency multi-operating mode dual-circularly polarized microwave network of claim 1, wherein: The low-noise amplifier (7) is greater than or equal to -1 dBm, and the amplification gain is greater than or equal to 25 dB.

7. The multi-frequency multi-operating mode dual-circularly polarized microwave network of claim 1, wherein: The output power of the power amplifier (8) is greater than 47 dBm.

8. The multi-frequency multi-operating mode dual-circularly polarized microwave network of claim 1, wherein: The isolation degree of the left-handed polarization conversion channel (3) and the right-handed polarization conversion channel (4) is greater than 15 dB.

9. The multi-frequency multi-operating mode dual-circularly polarized microwave network of claim 1, wherein: The transceiving isolation degree of the circulator (5) is greater than or equal to 18 dB.

10. The multi-frequency multi-operating mode dual-circularly polarized microwave network of claim 1, wherein: The multi-frequency-point multi-operation mode double-circular polarization microwave network is in the form of a waveguide, and the left-handed polarization conversion channel (3) and the right-handed polarization conversion channel (4) are both waveguide feed lines.

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