An L-band superconducting anti-jamming receiver front-end device

Abstract

This invention relates to the field of communication technology, and in particular to an L-band superconducting anti-interference receiver front-end device, comprising a low-pass filter, a gas switch, a superconducting filter, a first radio frequency switch, a second radio frequency switch, a low-noise amplifier, and a control board. By connecting these components together, the strong pulse suppression capability of the gas switch is combined with the fast response capability of the superconducting filter, thereby improving the anti-interference capability of the receiver front-end and protecting the downstream electronic components from damage. At the same time, the low insertion loss and high out-of-band rejection capability of the superconducting filter can be used to improve the sensitivity of the receiver.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to an L-band superconducting anti-interference receiving front-end device. Background Art

[0002] The 960–1215 MHz band is reserved worldwide for the use and development of airborne electronic navigation aids in aviation radio navigation services, as well as any directly related land-based facilities. Numerous devices are distributed in the 960–1215 MHz band, including Tactical Air Navigation System (TACAN), IFF (Identification Friend or Foe) systems, Joint Tactical Information Distribution System (JTIDS) data links, Secondary Air Traffic Control (ATC) equipment, Air Traffic Collision Avoidance System (ACAS), and Distance Measuring Equipment (DME).

[0003] Because they operate on the same frequency band, the effective transmitted signals and spurious harmonics of each device can easily enter the receiving channels of other devices. Combined with the signals required by the receiving devices themselves, these signals can undergo cross-modulation, mutual modulation, and the suppression of weak signals by strong signals. This typically reduces the sensitivity of the devices, leading to a decline in performance; in severe cases, it can clog the receiving channels or even burn out the receiver front-end. How to ensure the normal operation of these functional devices within the limited space of the platform and in a complex electromagnetic environment is precisely the problem that electromagnetic compatibility (EMC) needs to solve. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an L-band superconducting anti-interference receiving front-end device.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] An L-band superconducting anti-interference receiving front-end device includes a low-pass filter, a gas switch, a superconducting filter, a first radio frequency switch, a second radio frequency switch, a low-noise amplifier, and a control board; the low-pass filter, gas switch, first radio frequency switch, superconducting filter, second radio frequency switch, and low-noise amplifier are electrically connected in sequence, the superconducting filter is disposed in a cryogenic space, and the first radio frequency switch and the second radio frequency switch are both controlled by the control board.

[0007] Furthermore, the number of superconducting filters is eight, and the first and second radio frequency switches are both single-pole eight-throw switches, and are respectively connected to the eight superconducting filters one by one.

[0008] Furthermore, it also includes a refrigeration unit electrically connected to the control board, the output of which is connected to the cryogenic space.

[0009] Furthermore, it also includes a power module, which is connected to the first radio frequency switch, the second radio frequency switch, the control board, and the refrigerator motor.

[0010] Furthermore, the power module includes a first voltage conversion unit and a second voltage conversion unit. The first voltage conversion unit is used to convert the input 220V AC power into 24V DC power output, and the second voltage conversion unit is used to convert the input 220V AC power into 48V DC power output. The input terminals of the first voltage conversion unit and the second voltage conversion unit are both electrically connected to the mains power. The output terminal of the first voltage conversion unit is electrically connected to the first RF switch, the second RF switch, and the control board, respectively. The output terminal of the second voltage conversion unit is electrically connected to the refrigerator.

[0011] Furthermore, it also includes a display device and an input device, wherein the display device is electrically connected to the refrigerator and the control board respectively, and the input device is electrically connected to the control board.

[0012] Furthermore, the display device is a display screen; the input device is a keyboard.

[0013] Furthermore, the low-noise amplifier is integrated near the superconducting filter.

[0014] The beneficial effects of the present invention are:

[0015] This invention provides an L-band superconducting anti-interference receiver front-end device, comprising a low-pass filter, a gas switch, a superconducting filter, a first radio frequency switch, a second radio frequency switch, a low-noise amplifier, and a control board. Through their interconnections, the strong pulse suppression capability of the gas switch is combined with the fast response capability of the superconducting filter, thereby improving the anti-interference capability of the receiver front-end and protecting the downstream electronic components from damage. At the same time, the low insertion loss and high out-of-band rejection capability of the superconducting filter can improve the sensitivity of the receiver. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an L-band superconducting anti-interference receiving front-end device according to the present invention;

[0017] Label Explanation:

[0018] 1. Low-pass filter; 2. Gas switch; 3. First RF switch; 4. Superconducting filter; 5. Second RF switch; 6. Low-noise amplifier; 7. Control board; 8. Refrigeration unit; 9. Power module; 10. Display screen; 11. Keyboard. DETAILED DESCRIPTION

[0019] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0020] Please refer to Figure 1 The present invention provides an L-band superconducting anti-interference receiving front-end device, comprising a low-pass filter, a gas switch, a superconducting filter, a first radio frequency switch, a second radio frequency switch, a low-noise amplifier, and a control board; the low-pass filter, gas switch, first radio frequency switch, superconducting filter, second radio frequency switch, and low-noise amplifier are electrically connected in sequence, the superconducting filter is disposed in a cryogenic space, and the first radio frequency switch and the second radio frequency switch are both controlled by the control board.

[0021] As can be seen from the above description, the beneficial effects of the present invention are as follows:

[0022] This invention provides an L-band superconducting anti-interference receiver front-end device, comprising a low-pass filter, a gas switch, a superconducting filter, a first radio frequency switch, a second radio frequency switch, a low-noise amplifier, and a control board. Through their interconnections, the strong pulse suppression capability of the gas switch is combined with the fast response capability of the superconducting filter, thereby improving the anti-interference capability of the receiver front-end and protecting the downstream electronic components from damage. At the same time, the low insertion loss and high out-of-band rejection capability of the superconducting filter can improve the sensitivity of the receiver.

[0023] Furthermore, the number of superconducting filters is eight, and the first and second radio frequency switches are both single-pole eight-throw switches, and are respectively connected to the eight superconducting filters one by one.

[0024] As described above, the single-pole eight-throw switch is used to switch between different paths. When the control board is set to different frequencies, the single-pole eight-throw switch can switch to the corresponding superconducting filter channel. The cryogenic space is used to place the superconducting filter. It is a vacuum space. Eight superconducting filters are placed in the cryogenic space, which achieves coverage of the 960-1215GHz frequency band.

[0025] Furthermore, it also includes a refrigeration unit electrically connected to the control board, the output of which is connected to the cryogenic space.

[0026] As described above, the refrigerator is used to cool the low-temperature space to ensure that the filter operates within the superconducting temperature range.

[0027] Furthermore, it also includes a power module, which is connected to the first radio frequency switch, the second radio frequency switch, the control board, and the refrigerator motor.

[0028] As described above, the power module is used to supply power to the first RF switch, the second RF switch, the control board, and the refrigerator.

[0029] Furthermore, the power module includes a first voltage conversion unit and a second voltage conversion unit. The first voltage conversion unit is used to convert the input 220V AC power into 24V DC power output, and the second voltage conversion unit is used to convert the input 220V AC power into 48V DC power output. The input terminals of the first voltage conversion unit and the second voltage conversion unit are both electrically connected to the mains power. The output terminal of the first voltage conversion unit is electrically connected to the first RF switch, the second RF switch, and the control board, respectively. The output terminal of the second voltage conversion unit is electrically connected to the refrigerator.

[0030] As described above, the first and second voltage conversion units of the power module convert AC 220V voltage to DC 48V power to supply power to the refrigerator and convert AC 220V voltage to DC 28V to supply power to the single-pole eight-throw switch and control board, respectively.

[0031] Furthermore, it also includes a display device and an input device, wherein the display device is electrically connected to the refrigerator and the control board respectively, and the input device is electrically connected to the control board.

[0032] Furthermore, the display device is a display screen; the input device is a keyboard.

[0033] As described above, the display screen shows the temperature of the chiller, the current operating frequency of the filter, and whether the equipment is ready. The keyboard is used to set the operating frequency of the equipment and the temperature of the chiller.

[0034] Furthermore, the low-noise amplifier is integrated near the superconducting filter.

[0035] As described above, this method can effectively reduce the noise figure of the entire receiving link and improve receiving sensitivity.

[0036] See Figure 1 Embodiment 1 of the present invention is as follows:

[0037] This invention provides an L-band superconducting anti-interference receiving front-end device, comprising a low-pass filter 1, a gas switch 2, a superconducting filter 4, a first radio frequency switch 3, a second radio frequency switch 5, a low-noise amplifier 6, a control board 7, a cryostat 8, a power module 9, a display screen 10, and a keyboard 11. The low-pass filter 1, gas switch 2, first radio frequency switch 3, superconducting filter 4, second radio frequency switch 5, and low-noise amplifier 6 are electrically connected in sequence. The superconducting filter 4 is disposed in a cryogenic space. The first radio frequency switch 3 and the second radio frequency switch 5 are both controlled by the control board 7, i.e., the first radio frequency switch and the second radio frequency switch are electrically connected to the control board respectively. The cryostat 8 is electrically connected to the control board 7, and the output terminal of the cryostat 8 is connected to the cryogenic space. The cryostat is used to cool the cryogenic space to ensure that the filter operates within the superconducting temperature range.

[0038] It should be noted that existing products can be used for the low-pass filter, gas switch, superconducting filter, first RF switch, second RF switch, low-noise amplifier, control board, refrigerator, power module, display screen and keyboard.

[0039] Among them, the control board 7 is used to control the single-pole eight-throw switch to switch between different channels, and can also control the start and stop of the refrigeration unit.

[0040] Low-pass filter 1 can suppress parasitic passband signals of the superconducting filter, thereby suppressing high-frequency interference signals. The gas switch can suppress strong electromagnetic pulse signals of not less than 10 kV / m.

[0041] The low-noise amplifier 6 is integrated near the superconducting filter, which can effectively reduce the noise figure of the entire receiving link and improve the receiving sensitivity.

[0042] The power module 9 is electrically connected to the first RF switch 3, the second RF switch 5, the control board 7, and the refrigerator 8. The power module 9 includes a first voltage conversion unit and a second voltage conversion unit. The first voltage conversion unit converts the input 220V AC power into 24V DC power for output, and the second voltage conversion unit converts the input 220V AC power into 48V DC power for output. The input terminals of both the first and second voltage conversion units are electrically connected to AC mains power. The output terminal of the first voltage conversion unit is electrically connected to the first RF switch, the second RF switch, and the control board, respectively. The output terminal of the second voltage conversion unit is electrically connected to the refrigerator. Through the first and second voltage conversion units of the power module, 220V AC power is converted to 48V DC power to supply power to the refrigerator, and 220V AC power is converted to 28V DC power to supply power to the single-pole eight-throw switch and the control board.

[0043] In this embodiment, there are eight superconducting filters 4. The first RF switch 3 and the second RF switch 5 are both single-pole eight-throw switches, and are connected to each of the eight superconducting filters in a one-to-one correspondence. The single-pole eight-throw switches are used to switch between different paths. When the control board is set to different frequencies, the single-pole eight-throw switches can switch to the corresponding superconducting filter channel. The cryogenic space is used to place the superconducting filters. It is a vacuum space, and eight superconducting filters are placed in the cryogenic space, achieving coverage of the 960-1215 GHz frequency band.

[0044] The display screen 10 is electrically connected to both the chiller and the control board. The display screen shows the temperature of the chiller, the current operating frequency of the filter, and whether the equipment is ready. The keyboard 11 is electrically connected to the control board and is used to set the operating frequency of the equipment and the temperature of the chiller.

[0045] In summary, the L-band superconducting anti-interference receiving front-end device provided by this invention includes a low-pass filter, a gas switch, a superconducting filter, a first radio frequency switch, a second radio frequency switch, a low-noise amplifier, and a control board. Through their interconnections, the strong pulse suppression capability of the gas switch is combined with the fast response capability of the superconducting filter, thereby improving the anti-interference capability of the receiving front-end and protecting the downstream electronic components from damage. At the same time, the low insertion loss and high out-of-band rejection capability of the superconducting filter can improve the sensitivity of the receiver.

[0046] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An L-band superconducting anti-interference receiving front-end device, characterized in that: It includes a low-pass filter, a gas switch, a superconducting filter, a first radio frequency switch, a second radio frequency switch, a low-noise amplifier, and a control board; the low-pass filter, gas switch, first radio frequency switch, superconducting filter, second radio frequency switch, and low-noise amplifier are electrically connected in sequence, the superconducting filter is located in a cryogenic space, and the first radio frequency switch and the second radio frequency switch are both controlled by the control board.

2. The L-band superconducting anti-interference receiving front-end device according to claim 1, characterized in that: The number of superconducting filters is eight. The first RF switch and the second RF switch are both single-pole eight-throw switches, and are connected to the eight superconducting filters one by one.

3. The L-band superconducting anti-interference receiving front-end device according to claim 1, characterized in that: It also includes a refrigeration unit electrically connected to the control board, the output of which is connected to the cryogenic space.

4. The L-band superconducting anti-interference receiving front-end device according to claim 3, characterized in that: It also includes a power module, which is connected to the first radio frequency switch, the second radio frequency switch, the control board and the refrigerator.

5. The L-band superconducting anti-interference receiving front-end device according to claim 4, characterized in that: The power module includes a first voltage conversion unit and a second voltage conversion unit. The first voltage conversion unit is used to convert the input 220V AC power into 24V DC power output, and the second voltage conversion unit is used to convert the input 220V AC power into 48V DC power output. The input terminals of the first voltage conversion unit and the second voltage conversion unit are both electrically connected to the mains power. The output terminal of the first voltage conversion unit is electrically connected to the first RF switch, the second RF switch and the control board, respectively. The output terminal of the second voltage conversion unit is electrically connected to the refrigerator.

6. The L-band superconducting anti-interference receiving front-end device according to claim 3, characterized in that: It also includes a display device and an input device, wherein the display device is electrically connected to the refrigerator and the control board respectively, and the input device is electrically connected to the control board.

7. The L-band superconducting anti-interference receiving front-end device according to claim 6, characterized in that: The display device is a screen; the input device is a keyboard.

8. The L-band superconducting anti-interference receiving front-end device according to claim 1, characterized in that: The low-noise amplifier is integrated near the superconducting filter.

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