Radio frequency front-end assembly and working method thereof

Abstract

The invention provides a radio frequency front-end assembly and a working method thereof. A radio frequency front end assembly comprises a first amplification module, a second amplification module, a third amplification module, a fourth amplification module, a switch assembly used for realizing dual polarization switching, a first circulator, a second circulator, a third circulator, a fourth circulator, a duplexer A, a duplexer B and a power divider. The first amplification module and the second amplification module are connected with the first circulator and the second circulator in a one-to-one correspondence manner; the third amplification module and the fourth amplification module are connected with the third circulator and the fourth circulator in a one-to-one correspondence manner; the switch assembly is connected with the first circulator, the second circulator, the third circulator and the fourth circulator. The first circulator and the second circulator are both connected with the duplexer A, and the third circulator and the fourth circulator are both connected with the duplexer B; and the duplexer A and the duplexer B are both connected with the power divider.

Description

Technical Field

[0001] The present invention relates to the technical field of radio frequency front-end components, and in particular to a radio frequency front-end component and a working method thereof. Background Art

[0002] As a key component of the radar system, the RF front-end component is the core of wireless connection. It is the basic part for signal transmission and reception between the antenna and the RF transceiver module, which directly affects the performance of the entire radar system. Guided by demand, radar is developing towards high power, multi-polarization, broadband and miniaturization. As one of the key subsystems of the radar system, the RF front-end component has put forward higher and higher requirements in terms of high power, broadband, multi-polarization and miniaturization, especially in the VHF band with a longer wavelength, and the design requirements for broadband and miniaturization are increasing.

[0003] Therefore, it is very necessary to study and design RF front-end components in terms of high power, high efficiency, broadband, multi-polarization and miniaturization. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a radio frequency front-end component and a working method thereof in view of the deficiencies in the prior art.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: a radio frequency front-end component, comprising: a first amplification module, a second amplification module, a third amplification module, a fourth amplification module, a switch component for realizing dual-polarization switching, a first circulator, a second circulator, a third circulator, a fourth circulator, a duplexer A, a duplexer B and a power divider, wherein the first amplification module and the second amplification module are connected to the first circulator and the second circulator in a one-to-one correspondence, and the third amplification module and the fourth amplification module are connected to the third circulator and the fourth circulator in a one-to-one correspondence; the switch component is respectively connected to the first circulator, the second circulator, the third circulator and the fourth circulator; the first circulator and the second circulator are both connected to the duplexer A, and the third circulator and the fourth circulator are both connected to the duplexer B; the duplexer A and the duplexer B are both connected to the power divider.

[0006] The beneficial effects of the technical solution of the present invention are: using frequency band separation plus duplexer to obtain bandwidth of more than 2 octaves; using the combination of distributed and lumped parameters to achieve miniaturized design of circulators; duplexer has filtering function, which improves the anti-interference ability of the system; bandwidth requirements of transmitting power amplifier are reduced, which reduces the design difficulty and improves the efficiency and reliability of power amplifier. It solves the problems of high power, multi-polarization, broadband and miniaturization of RF front-end components, especially broadband and miniaturization of VHF band.

[0007] Further, the first amplification module is a low-frequency limiting amplification module A, the second amplification module is a high-frequency limiting amplification module A, the third amplification module is a low-frequency limiting amplification module B, the fourth amplification module is a high-frequency limiting amplification module B, the first circulator is a low-frequency circulator A, the second circulator is a high-frequency circulator A, the third circulator is a low-frequency circulator B, and the fourth circulator is a high-frequency circulator B.

[0008] The beneficial effects of adopting the above further technical solution are: by utilizing frequency band separation, a low-frequency circulator and a high-frequency circulator are combined with a duplexer to obtain a bandwidth of more than 2 times the frequency band, which solves the problem that the bandwidth of the VHF band circulator is limited and a single circulator cannot achieve broadband. The duplexer has a filtering function to improve the anti-interference ability of the system. The bandwidth requirement of the transmitting power amplifier is reduced, which reduces the design difficulty and improves the efficiency and reliability of the power amplifier.

[0009] Furthermore, the switch assembly includes: a high-power switch A and a high-power switch B, the high-power switch A is respectively connected to the first circulator and the third circulator, the high-power switch B is respectively connected to the second circulator and the fourth circulator, the high-power switch A is connected to a low-frequency transmission signal input terminal, and the high-power switch B is connected to a high-frequency transmission signal input terminal.

[0010] The beneficial effect of adopting the above further technical solution is: dual polarization switching is achieved through a high-power switch, and the mutual interference between high-frequency and low-frequency transmission signals can be effectively suppressed through the switching control setting of the switch, thereby reducing the noise floor.

[0011] Furthermore, the duplexer A is connected to the power divider via a coupler A, and the duplexer B is connected to the power divider via a coupler B; the coupler A is connected to a horizontal polarization signal output end, and the coupler B is connected to a vertical polarization signal output end.

[0012] The beneficial effect of adopting the above further technical solution is that a coupler is provided in the RF front-end component, which can upload the transmission signal or input the reception signal, and realize the real-time detection of the transmission and reception channels with the real-time control of the system.

[0013] Furthermore, the first amplifying module, the second amplifying module, the third amplifying module, and the fourth amplifying module are respectively connected to an absorption limiter.

[0014] The beneficial effect of adopting the above further technical solution is: because the circulator is placed in front of the high-power switch, the antenna reflected signal enters the limiter after passing through the circulator, which can effectively protect the switch and protect the receiving amplifier from being burned by the high-power signal reflected by the antenna.

[0015] Further, the first amplification module is connected to a low-frequency receiving horizontal polarization signal output terminal, the power divider is connected to an output terminal of a detection signal, the second amplification module is connected to a high-frequency receiving horizontal polarization signal output terminal, the third amplification module is connected to a low-frequency receiving vertical polarization signal output terminal, and the fourth amplification module is connected to a high-frequency receiving vertical polarization signal output terminal.

[0016] The beneficial effect of adopting the above further technical solution is that it facilitates the input and output of various signals into the RF front-end components.

[0017] Furthermore, power control terminals of the first amplifying module, the second amplifying module, the third amplifying module and the fourth amplifying module are all connected to a power control circuit, and the power control circuit is connected to a power control signal input terminal.

[0018] The beneficial effect of adopting the above further technical solution is that the power control circuit is set up to control the switch component and provide power to the active device.

[0019] In addition, the present invention also provides a working method of a RF front-end component, based on an RF front-end component described in any one of the above, the working method of the RF front-end component includes: in a transmitting state working mode, a transmitting signal enters the RF front-end component, and a polarization mode is selected by controlling a switch component through a power control circuit; after the polarization mode is selected, the transmitting signal is transmitted to a duplexer through a circulator; after filtering by the duplexer, the transmitting signal is transmitted to a polarized antenna; in a receiving state working mode, a receiving signal enters the RF front-end component, and after filtering by the duplexer, the receiving signal is transmitted to a circulator; the receiving signal is transmitted to an amplification module through a circulator; the receiving signal is amplified by the amplification module and a polarized signal is output.

[0020] The beneficial effects of the technical solution of the present invention are: using frequency band separation plus duplexer to obtain bandwidth of more than 2 octaves; using the combination of distributed and lumped parameters to achieve miniaturized design of circulators; duplexer has filtering function, which improves the anti-interference ability of the system; bandwidth requirements of transmitting power amplifier are reduced, which reduces the design difficulty and improves the efficiency and reliability of power amplifier. It solves the problems of high power, multi-polarization, broadband and miniaturization of RF front-end components, especially broadband and miniaturization of VHF band.

[0021] Furthermore, the transmission signal includes: a low-frequency transmission signal and a high-frequency transmission signal, and the polarization modes include: horizontal polarization and vertical polarization; the received signal is a horizontal polarization signal and a vertical polarization signal; in the transmission state working mode, when the transmission signal is a low-frequency transmission signal, the low-frequency transmission signal enters the RF front-end component, and the high-power switch A is controlled by the power control circuit to select horizontal polarization or vertical polarization; when horizontal polarization is selected, the low-frequency transmission signal is transmitted to the duplexer A through the low-frequency circulator A; after filtering by the duplexer A, the low-frequency transmission signal is transmitted to the horizontally polarized antenna through the coupler A; when vertical polarization is selected, the low-frequency transmission signal is transmitted to the duplexer through the low-frequency circulator B. The high-frequency transmission signal is transmitted to the vertically polarized antenna through the coupler B after filtering through the duplexer B; in the transmitting state working mode, and when the transmission signal is a high-frequency transmission signal, the high-frequency transmission signal enters the RF front-end component, and the high-power switch B is controlled by the power control circuit to select horizontal polarization or vertical polarization; when horizontal polarization is selected, the high-frequency transmission signal is transmitted to the duplexer A through the high-frequency circulator A; the high-frequency transmission signal is transmitted to the horizontally polarized antenna through the coupler A after filtering through the duplexer A; when vertical polarization is selected, the high-frequency transmission signal is transmitted to the duplexer B through the high-frequency circulator B; the high-frequency transmission signal is transmitted to the vertically polarized antenna through the coupler B after filtering through the duplexer B. antenna; in the receiving state working mode, and the receiving signal received by the antenna is a horizontally polarized signal, the horizontally polarized signal enters the RF front-end component and is transmitted to the duplexer A through the coupler A; after filtering and selecting by the duplexer A, the low-frequency signal is transmitted to the low-frequency circulator A; the low-frequency signal is transmitted to the low-frequency limiting amplifier module A through the low-frequency circulator A; the low-frequency signal is amplified by the low-frequency limiting amplifier module A and then a low-frequency receiving horizontal polarized signal is output; after filtering and selecting by the duplexer A, the high-frequency signal is transmitted to the high-frequency circulator A; the high-frequency signal is transmitted to the high-frequency limiting amplifier module A through the high-frequency circulator A; the high-frequency signal is amplified by the high-frequency limiting amplifier module A and then a high-frequency receiving horizontal polarized signal is output. No.; in the receiving state working mode, and the receiving signal received by the antenna is a vertically polarized signal, the vertically polarized signal enters the RF front-end component and is transmitted to the duplexer B through the coupler B; the low-frequency signal is filtered and selected by the duplexer B and then transmitted to the low-frequency circulator B; the low-frequency signal is transmitted to the low-frequency limiting amplifier module B through the low-frequency circulator B; the low-frequency signal is amplified by the low-frequency limiting amplifier module B and then outputs a low-frequency receiving vertically polarized signal; the high-frequency signal is filtered and selected by the duplexer B and then transmitted to the high-frequency circulator B; the high-frequency signal is transmitted to the high-frequency limiting amplifier module B through the high-frequency circulator B; the high-frequency signal is amplified by the high-frequency limiting amplifier module B and then outputs a high-frequency receiving vertically polarized signal.

[0022] The beneficial effect of adopting the above-mentioned further technical solution is: dual-polarization switching is realized by a high-power switch, and through the switching control setting of the switch, when the low-frequency transmission path is switched to horizontal polarization, the high-frequency transmission path is switched to vertical polarization, and when the low-frequency transmission path is switched to vertical polarization, the high-frequency transmission path is switched to horizontal polarization, which can effectively suppress the interference between high and low frequency transmission signals and reduce the noise floor.

[0023] Furthermore, in the detection test mode, the transmission signal passes through coupler A or coupler B; and the transmission signal is coupled through coupler A or coupler B; the coupled transmission signal is output through the power divider; the receiving signal enters the power divider, and the receiving signal is transmitted to coupler A or coupler B through the power divider; the receiving signal is coupled through coupler A or coupler B, and the coupled receiving signal is transmitted to the receiving link.

[0024] The beneficial effect of adopting the above further technical solution is: in the detection test mode, after the transmission signal passes through coupler A or coupler B, the coupled transmission signal is sent to the power divider and then output, so that the transmission path can be detected in real time. The receiving detection signal is sent to coupler A or coupler B through the power divider and coupled into the receiving link, so that the receiving path can be detected in real time.

[0025] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a radio frequency front-end component provided in an embodiment of the present invention.

[0027] Explanation of the accompanying drawings: 1. low-frequency limiting amplifier module A; 2. high-frequency limiting amplifier module A; 3. low-frequency limiting amplifier module B; 4. high-frequency limiting amplifier module B; 5. high-power switch A; 6. high-power switch B; 7. low-frequency circulator A; 8. high-frequency circulator A; 9. low-frequency circulator B; 10. high-frequency circulator B; 11. duplexer A; 12. duplexer B; 13. coupler A; 14. coupler B; 15. power divider; 16. power supply control circuit; 17. low-frequency transmission signal input terminal; 18. high-frequency transmission signal input terminal; 19. horizontal polarization signal output terminal; 20. vertical polarization signal output terminal; 21. low-frequency receiving horizontal polarization signal output terminal; 22. detection signal output terminal; 23. high-frequency receiving horizontal polarization signal output terminal; 24. low-frequency receiving vertical polarization signal output terminal; 25. high-frequency receiving vertical polarization signal output terminal; 26. power supply control signal input terminal. DETAILED DESCRIPTION

[0028] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention but not to limit the scope of the present invention.

[0029] like Figure 1 As shown, an embodiment of the present invention provides a radio frequency front-end component, including: a first amplifying module, a second amplifying module, a third amplifying module, a fourth amplifying module, a switch component for realizing dual-polarization switching, a first circulator, a second circulator, a third circulator, a fourth circulator, a duplexer A11, a duplexer B12 and a power divider 15, wherein the first amplifying module and the second amplifying module are connected to the first circulator and the second circulator one-to-one, and the third amplifying module and the fourth amplifying module are connected to the third circulator and the fourth circulator one-to-one; the switch component is respectively connected to the first circulator, the second circulator, the third circulator and the fourth circulator; the first circulator and the second circulator are both connected to the duplexer A11, and the third circulator and the fourth circulator are both connected to the duplexer B12; the duplexer A11 and the duplexer B12 are both connected to the power divider 15.

[0030] The beneficial effects of the technical solution of the present invention are: using frequency band separation plus duplexer to obtain bandwidth of more than 2 octaves; using the combination of distributed and lumped parameters to achieve miniaturized design of circulators; duplexer has filtering function, which improves the anti-interference ability of the system; bandwidth requirements of transmitting power amplifier are reduced, which reduces the design difficulty and improves the efficiency and reliability of power amplifier. It solves the problems of high power, multi-polarization, broadband and miniaturization of RF front-end components, especially broadband and miniaturization of VHF band.

[0031] Figure 1 The arrows in the figure represent the transmission direction and trajectory of the signal.

[0032] The invention relates to a radio frequency front end component, in particular to a radio frequency front end component in a VHF (Very High Frequency) band.

[0033] An RF front-end component provided by an embodiment of the present invention can solve the high power, multi-polarization, broadband and miniaturization problems of very high frequency (VHF) RF front-end components. Bandwidth of more than 2 octaves is obtained by using frequency band separation and duplexer; the miniaturization design of the circulator is realized by combining distributed and lumped parameters; the duplexer has a filtering function to improve the anti-interference ability of the system; the bandwidth requirement of the transmitting power amplifier is reduced, which reduces the design difficulty and improves the efficiency and reliability of the power amplifier.

[0034] The high-power switch is used to achieve dual-polarization switching. Through the switch control setting, the interference between high-frequency and low-frequency transmission signals can be effectively suppressed, and the noise floor can be reduced. Since the circulator is placed in front of the high-power switch, the antenna reflected signal enters the limiter after the circulator, which can effectively protect the switch.

[0035] The radio frequency front-end component has a coupler, which can upload the transmission signal or input the receiving signal, and realize the real-time detection of the transceiver channel with the real-time control of the system. The invention has high reliability and versatility and can be used for engineering applications.

[0036] like Figure 1 As shown, further, the first amplification module is a low-frequency limiting amplification module A1, the second amplification module is a high-frequency limiting amplification module A2, the third amplification module is a low-frequency limiting amplification module B3, the fourth amplification module is a high-frequency limiting amplification module B4, the first circulator is a low-frequency circulator A7, the second circulator is a high-frequency circulator A8, the third circulator is a low-frequency circulator B9, and the fourth circulator is a high-frequency circulator B10.

[0037] The beneficial effects of adopting the above further technical solution are: by utilizing frequency band separation, a low-frequency circulator and a high-frequency circulator are combined with a duplexer to obtain a bandwidth of more than 2 times the frequency band, which solves the problem that the bandwidth of the VHF band circulator is limited and a single circulator cannot achieve broadband. The duplexer has a filtering function to improve the anti-interference ability of the system. The bandwidth requirement of the transmitting power amplifier is reduced, which reduces the design difficulty and improves the efficiency and reliability of the power amplifier.

[0038] like Figure 1 As shown, further, the switch component includes: a high-power switch A5 and a high-power switch B6, the high-power switch A5 is connected to the first circulator and the third circulator respectively, the high-power switch B6 is connected to the second circulator and the fourth circulator respectively, the high-power switch A5 is connected to a low-frequency transmission signal input terminal 17, and the high-power switch B6 is connected to a high-frequency transmission signal input terminal 18.

[0039] The beneficial effect of adopting the above further technical solution is: dual polarization switching is achieved through a high-power switch, and the mutual interference between high-frequency and low-frequency transmission signals can be effectively suppressed through the switching control setting of the switch, thereby reducing the noise floor.

[0040] like Figure 1 As shown, further, the duplexer A11 is connected to the power divider 15 through a coupler A13, and the duplexer B12 is connected to the power divider 15 through a coupler B14; the coupler A13 is connected to a horizontal polarization signal output terminal 19, and the coupler B14 is connected to a vertical polarization signal output terminal 20.

[0041] The beneficial effect of adopting the above further technical solution is that a coupler is provided in the RF front-end component, which can upload the transmission signal or input the reception signal, and realize the real-time detection of the transmission and reception channels with the real-time control of the system.

[0042] Furthermore, the first amplifying module, the second amplifying module, the third amplifying module, and the fourth amplifying module are respectively connected to an absorption limiter.

[0043] The beneficial effect of adopting the above further technical solution is: because the circulator is placed in front of the high-power switch, the antenna reflected signal enters the limiter after passing through the circulator, which can effectively protect the switch and protect the receiving amplifier from being burned by the high-power signal reflected by the antenna.

[0044] like Figure 1 As shown, further, the first amplifying module is connected to a low-frequency receiving horizontal polarization signal output terminal 21, the power divider 15 is connected to a detection signal output terminal 22, the second amplifying module is connected to a high-frequency receiving horizontal polarization signal output terminal 23, the third amplifying module is connected to a low-frequency receiving vertical polarization signal output terminal 24, and the fourth amplifying module is connected to a high-frequency receiving vertical polarization signal output terminal 25.

[0045] The beneficial effect of adopting the above further technical solution is that it facilitates the input and output of various signals into the RF front-end components.

[0046] like Figure 1 As shown, further, the power control ends of the first amplifying module, the second amplifying module, the third amplifying module and the fourth amplifying module are all connected to a power control circuit 16 , and the power control circuit 16 is connected to a power control signal input end 26 .

[0047] The beneficial effect of adopting the above further technical solution is that the power control circuit is set up to control the switch component and provide power to the active device.

[0048] like Figure 1 As shown, an embodiment of the present invention provides a radio frequency front-end component, which can be a very high frequency (VHF) band radio frequency front-end component, including: a low-frequency limiting amplifier module A1, a high-frequency limiting amplifier module A2, a low-frequency limiting amplifier module B3, a high-frequency limiting amplifier module B4, a high-power switch A5, a high-power switch B6, a low-frequency circulator A7, a high-frequency circulator A8, a low-frequency circulator B9, a high-frequency circulator B10, a duplexer A11, a duplexer B12, a coupler A13, a coupler B14, a power divider 15, and a power supply control circuit 16.

[0049] Port b of the low-frequency limiting amplifier module A1 is connected to the low-frequency receiving horizontal polarization signal output terminal 21, port a of the low-frequency limiting amplifier module A1 is connected to port b of the low-frequency circulator A7, port c of the low-frequency circulator A7 is connected to port a of the duplexer A11, port c of the duplexer A11 is connected to port a of the coupler A13, port b of the coupler A13 is connected to the horizontal polarization signal output terminal 19, port c of the coupler A13 is connected to port a of the power divider 15, and port c of the power divider 15 is connected to the output terminal 22 of the detection signal.

[0050] Port b of the high-frequency limiting amplifier module A2 is connected to the high-frequency receiving horizontal polarization signal output terminal 23, port a of the high-frequency limiting amplifier module A2 is connected to port b of the high-frequency circulator A8, and port c of the high-frequency circulator A8 is connected to port b of the duplexer A11.

[0051] Port b of the low-frequency limiting amplifier module B3 is connected to the low-frequency receiving vertical polarization signal output terminal 24, port a of the low-frequency limiting amplifier module B3 is connected to port b of the low-frequency circulator B9, port c of the low-frequency circulator B9 is connected to port a of the duplexer B12, port c of the duplexer B12 is connected to port a of the coupler B14, port b of the coupler B14 is connected to the vertical polarization signal output terminal 20, and port c of the coupler B14 is connected to port b of the power divider 15.

[0052] Port b of the high-frequency limiting amplifier module B4 is connected to the high-frequency receiving vertical polarization signal output terminal 25, port a of the high-frequency limiting amplifier module B4 is connected to port b of the high-frequency circulator B10, and port c of the high-frequency circulator B10 is connected to port b of the duplexer B12.

[0053] Port a of the high power switch A5 is connected to the low frequency transmission signal input terminal 17, port b of the high power switch A5 is connected to port a of the low frequency circulator A7, and port c of the high power switch A5 is connected to port a of the low frequency circulator B9.

[0054] Port a of the high-power switch B6 is connected to the high-frequency transmission signal input terminal 18, port b of the high-power switch B6 is connected to port a of the high-frequency circulator A8, port c of the high-power switch B6 is connected to port a of the high-frequency circulator B10, and the power control circuit 16 is connected to the power control terminal of the above-mentioned active device.

[0055] In addition, the present invention also provides a working method of a RF front-end component, based on an RF front-end component described in any one of the above, the working method of the RF front-end component includes: in a transmitting state working mode, a transmitting signal enters the RF front-end component, and a polarization mode is selected by controlling a switch component through a power control circuit; after the polarization mode is selected, the transmitting signal is transmitted to a duplexer through a circulator; after filtering by the duplexer, the transmitting signal is transmitted to a polarized antenna; in a receiving state working mode, a receiving signal enters the RF front-end component, and after filtering by the duplexer, the receiving signal is transmitted to a circulator; the receiving signal is transmitted to an amplification module through a circulator; the receiving signal is amplified by the amplification module and a polarized signal is output.

[0056] The beneficial effects of the technical solution of the present invention are: using frequency band separation plus duplexer to obtain bandwidth of more than 2 octaves; using the combination of distributed and lumped parameters to achieve miniaturized design of circulators; duplexer has filtering function, which improves the anti-interference ability of the system; bandwidth requirements of transmitting power amplifier are reduced, which reduces the design difficulty and improves the efficiency and reliability of power amplifier. It solves the problems of high power, multi-polarization, broadband and miniaturization of RF front-end components, especially broadband and miniaturization of VHF band.

[0057] Furthermore, the transmission signal includes: a low-frequency transmission signal and a high-frequency transmission signal, and the polarization modes include: horizontal polarization and vertical polarization; the received signal is a horizontal polarization signal and a vertical polarization signal; in the transmission state working mode, when the transmission signal is a low-frequency transmission signal, the low-frequency transmission signal enters the RF front-end component, and the high-power switch A is controlled by the power control circuit to select horizontal polarization or vertical polarization; when horizontal polarization is selected, the low-frequency transmission signal is transmitted to the duplexer A through the low-frequency circulator A; after filtering by the duplexer A, the low-frequency transmission signal is transmitted to the horizontally polarized antenna through the coupler A; when vertical polarization is selected, the low-frequency transmission signal is transmitted to the duplexer through the low-frequency circulator B. The high-frequency transmission signal is transmitted to the vertically polarized antenna through the coupler B after filtering through the duplexer B; in the transmitting state working mode, and when the transmission signal is a high-frequency transmission signal, the high-frequency transmission signal enters the RF front-end component, and the high-power switch B is controlled by the power control circuit to select horizontal polarization or vertical polarization; when horizontal polarization is selected, the high-frequency transmission signal is transmitted to the duplexer A through the high-frequency circulator A; the high-frequency transmission signal is transmitted to the horizontally polarized antenna through the coupler A after filtering through the duplexer A; when vertical polarization is selected, the high-frequency transmission signal is transmitted to the duplexer B through the high-frequency circulator B; the high-frequency transmission signal is transmitted to the vertically polarized antenna through the coupler B after filtering through the duplexer B. antenna; in the receiving state working mode, and the receiving signal received by the antenna is a horizontally polarized signal, the horizontally polarized signal enters the RF front-end component and is transmitted to the duplexer A through the coupler A; after filtering and selecting by the duplexer A, the low-frequency signal is transmitted to the low-frequency circulator A; the low-frequency signal is transmitted to the low-frequency limiting amplifier module A through the low-frequency circulator A; the low-frequency signal is amplified by the low-frequency limiting amplifier module A and then a low-frequency receiving horizontal polarized signal is output; after filtering and selecting by the duplexer A, the high-frequency signal is transmitted to the high-frequency circulator A; the high-frequency signal is transmitted to the high-frequency limiting amplifier module A through the high-frequency circulator A; the high-frequency signal is amplified by the high-frequency limiting amplifier module A and then a high-frequency receiving horizontal polarized signal is output. No.; in the receiving state working mode, and the receiving signal received by the antenna is a vertically polarized signal, the vertically polarized signal enters the RF front-end component and is transmitted to the duplexer B through the coupler B; the low-frequency signal is filtered and selected by the duplexer B and then transmitted to the low-frequency circulator B; the low-frequency signal is transmitted to the low-frequency limiting amplifier module B through the low-frequency circulator B; the low-frequency signal is amplified by the low-frequency limiting amplifier module B and then outputs a low-frequency receiving vertically polarized signal; the high-frequency signal is filtered and selected by the duplexer B and then transmitted to the high-frequency circulator B; the high-frequency signal is transmitted to the high-frequency limiting amplifier module B through the high-frequency circulator B; the high-frequency signal is amplified by the high-frequency limiting amplifier module B and then outputs a high-frequency receiving vertically polarized signal.

[0058] The beneficial effect of adopting the above-mentioned further technical solution is: dual-polarization switching is realized by a high-power switch, and through the switching control setting of the switch, when the low-frequency transmission path is switched to horizontal polarization, the high-frequency transmission path is switched to vertical polarization, and when the low-frequency transmission path is switched to vertical polarization, the high-frequency transmission path is switched to horizontal polarization, which can effectively suppress the interference between high and low frequency transmission signals and reduce the noise floor.

[0059] Furthermore, in the detection test mode, the transmission signal passes through coupler A or coupler B; and the transmission signal is coupled through coupler A or coupler B; the coupled transmission signal is output through the power divider; the receiving signal enters the power divider, and the receiving signal is transmitted to coupler A or coupler B through the power divider; the receiving signal is coupled through coupler A or coupler B, and the coupled receiving signal is transmitted to the receiving link.

[0060] The beneficial effect of adopting the above further technical solution is: in the detection test mode, after the transmission signal passes through coupler A or coupler B, the coupled transmission signal is sent to the power divider and then output, so that the transmission path can be detected in real time. The receiving detection signal is sent to coupler A or coupler B through the power divider and coupled into the receiving link, so that the receiving path can be detected in real time.

[0061] The working states of the RF front-end components are divided into transmitting state and receiving state. Each working state is further divided into working mode and detection test mode. The system adopts time-division working mode.

[0062] In the transmitting state working mode, the low-frequency transmitting signal enters the RF front-end component, first passes through the high-power switch A5, and the power control circuit 16 controls the high-power switch A5 to select horizontal polarization or vertical polarization.

[0063] When horizontal polarization is selected, the transmission signal enters the low-frequency circulator A7 and is sent to the duplexer A11. After being filtered by the duplexer A11, it is sent to the coupler A13 and finally to the horizontal polarization antenna.

[0064] When vertical polarization is selected, the transmission signal enters the low-frequency circulator B9 and is sent to the duplexer B12. After being filtered by the duplexer B12, it is sent to the coupler B14 and finally to the vertical polarization antenna.

[0065] The high-frequency transmission signal enters the RF front-end component and first passes through the high-power switch B6. The power control circuit 16 controls the high-power switch B6 to select horizontal polarization or vertical polarization.

[0066] When horizontal polarization is selected, the transmission signal enters the high-frequency circulator A8 and is sent to the duplexer A11. After being filtered by the duplexer A11, it is sent to the coupler A13 and finally to the horizontal polarization antenna.

[0067] When vertical polarization is selected, the transmission signal enters the high-frequency circulator B10 and is sent to the duplexer B12. After being filtered by the duplexer B12, it is sent to the coupler B14 and finally to the vertical polarization antenna.

[0068] In the receiving state working mode, the horizontal polarization signal received by the antenna enters the RF front-end component, and is first sent to the duplexer A11 through the coupler A13. After filtering and selection, the duplexer A11 sends the low-frequency signal to the low-frequency circulator A7, and then to the low-frequency limiting amplifier module A1. After the signal is amplified, the low-frequency receiving horizontal polarization signal is output.

[0069] After filtering and selection, the duplexer A11 sends the high-frequency signal to the high-frequency circulator A8, and then to the high-frequency limiting amplifier module A2. After the signal is amplified, a high-frequency receiving horizontal polarization signal is output.

[0070] The vertically polarized signal received by the antenna enters the RF front-end component, and is first sent to the duplexer B12 through the coupler B14. After filtering and selection, the duplexer B12 sends the low-frequency signal to the low-frequency circulator B9, and then to the low-frequency limiting amplifier module B3. After the signal is amplified, the low-frequency received vertically polarized signal is output.

[0071] After filtering and selection, the duplexer B12 sends the high-frequency signal to the high-frequency circulator B10, and then to the high-frequency limiting amplifier module B4. After the signal is amplified, a high-frequency receiving vertical polarization signal is output.

[0072] In the detection test mode, after the transmission signal passes through the coupler A13 or the coupler B14, the coupled transmission signal is sent to the power divider 15 and then output, so that the transmission path can be detected in real time. The receiving detection signal is sent to the coupler A13 or the coupler B14 through the power divider 15, and coupled into the receiving link, so that the receiving path can be detected in real time.

[0073] The present invention utilizes frequency band separation, adopts a low-frequency circulator and a high-frequency circulator in combination with a duplexer to obtain a bandwidth of more than 2 octaves, and solves the problem that the bandwidth of the VHF band circulator is limited and a single circulator cannot achieve broadband. The duplexer has a filtering function, which improves the anti-interference ability of the system. The bandwidth requirement of the transmitting power amplifier is reduced, which reduces the design difficulty and improves the efficiency and reliability of the power amplifier.

[0074] The VHF band circulator adopts distributed parameter design, and its large size is not suitable for component miniaturization design. The circulator miniaturization design is realized by combining distributed and lumped parameters to meet the component miniaturization design requirements.

[0075] The high-power switch is used to realize dual-polarization switching. Through the switch control setting (when the low-frequency transmission path is switched to horizontal polarization, the high-frequency transmission path is switched to vertical polarization, and when the low-frequency transmission path is switched to vertical polarization, the high-frequency transmission path is switched to horizontal polarization), the interference between high-frequency and low-frequency transmission signals can be effectively suppressed, and the noise floor can be reduced. Since the circulator is placed in front of the high-power switch, the antenna reflection signal enters the limiter after the circulator, which can effectively protect the switch.

[0076] There is an absorptive limiter in front of the receiving amplifier to protect the receiving amplifier from being burned out by the high-power signal reflected by the antenna.

[0077] There is a coupler inside the component, which can upload the transmit signal or input the receive signal, and realize real-time detection of the transmit and receive channels with the real-time control of the system.

[0078] The present invention solves the high power, multi-polarization, broadband and miniaturization problems of very high frequency (VHF) radio frequency front-end components. The component structure adopts a high-density multi-layer design and uses microwave hybrid integration technology to ultimately design a 2-fold broadband, high power, dual-polarization and highly integrated miniaturized radio frequency front-end component. The design scheme of the present invention is universal, applicable to other bands, has high reliability, and can be used in engineering.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A radio frequency front end component, characterized in that: include: A first amplifying module, a second amplifying module, a third amplifying module, a fourth amplifying module, a switch component for realizing dual-polarization switching, a first circulator, a second circulator, a third circulator, a fourth circulator, a duplexer A, a duplexer B and a power divider, wherein the first amplifying module and the second amplifying module are connected to the first circulator and the second circulator one-to-one, and the third amplifying module and the fourth amplifying module are connected to the third circulator and the fourth circulator one-to-one; the switch component is respectively connected to the first circulator, the second circulator, the third circulator and the fourth circulator; the first circulator and the second circulator are both connected to the duplexer A, and the third circulator and the fourth circulator are both connected to the duplexer B; the duplexer A and the duplexer B are both connected to the power divider.

2. A radio frequency front end component according to claim 1, characterized in that: The first amplifier module is a low-frequency limiting amplifier module A, the second amplifier module is a high-frequency limiting amplifier module A, the third amplifier module is a low-frequency limiting amplifier module B, the fourth amplifier module is a high-frequency limiting amplifier module B, the first circulator is a low-frequency circulator A, the second circulator is a high-frequency circulator A, the third circulator is a low-frequency circulator B, and the fourth circulator is a high-frequency circulator B.

3. The RF front-end component according to claim 1, characterized in that: The switch assembly includes: a high-power switch A and a high-power switch B, the high-power switch A is connected to the first circulator and the third circulator respectively, the high-power switch B is connected to the second circulator and the fourth circulator respectively, the high-power switch A is connected to a low-frequency transmission signal input end, and the high-power switch B is connected to a high-frequency transmission signal input end.

4. The RF front-end component according to claim 1, characterized in that: The duplexer A is connected to the power divider via a coupler A, and the duplexer B is connected to the power divider via a coupler B; the coupler A is connected to a horizontal polarization signal output end, and the coupler B is connected to a vertical polarization signal output end.

5. The RF front-end component according to claim 1, characterized in that: The first amplifying module, the second amplifying module, the third amplifying module and the fourth amplifying module are respectively connected to an absorption limiter.

6. The RF front-end component according to claim 1, characterized in that: The first amplification module is connected to a low-frequency receiving horizontal polarization signal output terminal, the power divider is connected to a detection signal output terminal, the second amplification module is connected to a high-frequency receiving horizontal polarization signal output terminal, the third amplification module is connected to a low-frequency receiving vertical polarization signal output terminal, and the fourth amplification module is connected to a high-frequency receiving vertical polarization signal output terminal.

7. The RF front-end component according to claim 1, characterized in that: The power control ends of the first amplifying module, the second amplifying module, the third amplifying module and the fourth amplifying module are all connected to a power control circuit, and the power control circuit is connected to a power control signal input end.

8. A method for operating a radio frequency front-end component, characterized in that: Based on a radio frequency front-end component according to any one of claims 1 to 7 above, a working method of the radio frequency front-end component includes: In the transmitting state working mode, the transmitting signal enters the RF front-end component, and the switch component is controlled by the power control circuit to select the polarization mode selection; After polarization is selected, the transmit signal is passed to the duplexer through the circulator; The transmitted signal is passed to the polarized antenna after filtering by the duplexer; In the receiving state working mode, the received signal enters the RF front-end component, is filtered by the duplexer and then passed to the circulator; The received signal is transmitted to the amplification module through the circulator; The received signal is amplified by the amplifier module and then a polarized signal is output.

9. A working method of a radio frequency front-end component according to claim 8, characterized in that: The transmission signal includes: a low-frequency transmission signal and a high-frequency transmission signal, and the polarization modes include: horizontal polarization and vertical polarization; the receiving signal includes a horizontal polarization signal and a vertical polarization signal; In the transmitting state working mode, when the transmitting signal is a low-frequency transmitting signal, the low-frequency transmitting signal enters the RF front-end component, and the high-power switch A is controlled by the power control circuit to select horizontal polarization or vertical polarization; When horizontal polarization is selected, the low-frequency transmission signal is transmitted to duplexer A through low-frequency circulator A; After filtering by duplexer A, the low-frequency transmission signal is transmitted to the horizontally polarized antenna through coupler A; When vertical polarization is selected, the low-frequency transmission signal is transmitted to duplexer B through low-frequency circulator B; After filtering by duplexer B, the low-frequency transmission signal is passed to the vertically polarized antenna through coupler B; In the transmitting state working mode, when the transmitting signal is a high-frequency transmitting signal, the high-frequency transmitting signal enters the RF front-end component, and the power control circuit controls the high-power switch B to select horizontal polarization or vertical polarization; When horizontal polarization is selected, the high frequency transmission signal is transmitted to the duplexer A through the high frequency circulator A; After being filtered by duplexer A, the high frequency transmission signal is transmitted to the horizontal polarization antenna through coupler A; When vertical polarization is selected, the high frequency transmission signal is transmitted to duplexer B through high frequency circulator B; After filtering by duplexer B, the high frequency transmission signal is transmitted to the vertically polarized antenna through coupler B; In the receiving state working mode, the receiving signal received by the antenna is a horizontally polarized signal, the horizontally polarized signal enters the RF front-end component, and is transmitted to the duplexer A through the coupler A; After filtering and selection by duplexer A, the low-frequency signal is transmitted to low-frequency circulator A; The low-frequency signal is transmitted to the low-frequency limiting amplifier module A through the low-frequency circulator A; The low-frequency signal is amplified by the low-frequency limiting amplifier module A and then a low-frequency receiving horizontal polarization signal is output; After filtering and selection by duplexer A, the high-frequency signal is transmitted to high-frequency circulator A; The high-frequency signal is transmitted to the high-frequency limiting amplifier module A through the high-frequency circulator A; The high-frequency signal is amplified by the high-frequency limiting amplifier module A and then a high-frequency receiving horizontal polarization signal is output; In the receiving state working mode, the received signal received by the antenna is a vertically polarized signal, the vertically polarized signal enters the RF front-end component, and is transmitted to the duplexer B through the coupler B; After filtering and selection by duplexer B, the low-frequency signal is transmitted to low-frequency circulator B; The low-frequency signal is transmitted to the low-frequency limiting amplifier module B through the low-frequency circulator B; The low-frequency signal is amplified by the low-frequency limiting amplifier module B and then outputted as a low-frequency receiving vertical polarization signal; After filtering and selection by duplexer B, the high-frequency signal is transmitted to high-frequency circulator B; The high-frequency signal is transmitted to the high-frequency limiting amplifier module B through the high-frequency circulator B; The high-frequency signal is amplified by the high-frequency limiting amplifier module B and then output as a high-frequency receiving vertical polarization signal.

10. The working method of a radio frequency front-end component according to claim 8, characterized in that: In the detection test mode, the transmission signal passes through coupler A or coupler B; and the transmission signal is coupled through coupler A or coupler B; The coupled transmission signal is output through the power divider; The received signal enters the power divider, and the received signal is transmitted to coupler A or coupler B through the power divider; The receiving signal is coupled through coupler A or coupler B, and the coupled receiving signal is transmitted to the receiving link.

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