CN117978194A - An L-band superconducting anti-interference receiving front-end device - Google Patents

Abstract

The invention relates to the technical field of communication, in particular to an L-band superconductive anti-interference receiving front end device, which comprises a low-pass filter, a gas switch, a superconductive filter, a first radio frequency switch, a second radio frequency switch, a low-noise amplifier and a control board, wherein the strong pulse inhibition capability of the gas switch is combined with the rapid response capability of the superconductive filter through the connection relation, so that the anti-interference capability of the receiving front end is improved, the electronic components behind the receiving front end are protected from being damaged, and the sensitivity of a receiver can be improved by utilizing the capability of the superconductive filter of low insertion loss and high out-of-band inhibition degree.

Description

An L-band superconducting anti-interference receiving front-end device

Technical Field

The present invention relates to the field of communication technology, and in particular to an L-band superconducting anti-interference receiving front-end device.

Background technique

The 960-1215MHz frequency band is reserved worldwide for the use and development of airborne air navigation electronic aids in the aeronautical radio navigation service, as well as any directly related land-based facilities. There are many devices distributed in the 960-1215MHz frequency band, including the air tactical navigation system (TACAN), the identification friend or foe system (IFF), the joint tactical information distribution system (JTIDS) data link, the secondary air traffic control equipment (ATC), the air traffic collision avoidance system (ACAS), the distance measurement equipment (DME), etc.

Since they are in the same frequency band, the effective transmission signals and harmonic signals of each device can easily enter the receiving channels of other devices. Together with the required signals received by the device itself, these signals will undergo cross-modulation, mutual modulation, and strong signals suppressing the reception of weak signals. Usually, the sensitivity of the device will be reduced, resulting in a decline in device performance; in severe cases, the receiving channel of the device will be blocked, and even the front end of the receiver will be burned. How to achieve the normal use of the above functional devices in the limited space of the platform and the complex electromagnetic environment is exactly the problem that electromagnetic compatibility needs to solve.

Summary of the invention

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

In order to solve the above technical problems, the technical solution adopted by the present invention is:

An L-band superconducting anti-interference receiving front-end device comprises 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, the gas switch, the first radio frequency switch, the superconducting filter, the second radio frequency switch and the low-noise amplifier are electrically connected in sequence, the superconducting filter is arranged in a low-temperature space, and the first radio frequency switch and the second radio frequency switch are both controlled by the control board.

Furthermore, the number of the superconducting filters is eight, and the first radio frequency switch and the second radio frequency switch are both single-pole eight-throw switches, and are respectively connected to the eight superconducting filters in a one-to-one correspondence.

Furthermore, it also includes a refrigerator electrically connected to the control panel, and the output end of the refrigerator is connected to the low-temperature space.

Furthermore, it also includes a power module, which is electrically connected to the first radio frequency switch, the second radio frequency switch, the control board and the refrigerator respectively.

Furthermore, the power supply 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 a 24V DC output, the second voltage conversion unit is used to convert the input 220V AC power into a 48V DC output, the input end of the first voltage conversion unit and the input end of the second voltage conversion unit are both electrically connected to the mains, the output end of the first voltage conversion unit is electrically connected to the first RF switch, the second RF switch and the control board, respectively, and the output end of the second voltage conversion unit is electrically connected to the refrigerator.

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

Furthermore, the display device is a display screen; and the input device is a keyboard.

Furthermore, the low noise amplifier is integrated at the proximal end of the superconducting filter.

The beneficial effects of the present invention are:

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 strong pulse suppression capability of the gas switch and the fast response capability of the superconducting filter are combined for use through mutual connection, thereby improving the anti-interference capability of the receiving front-end and protecting the subsequent electronic components from damage. At the same time, the low insertion loss and high out-of-band suppression capabilities of the superconducting filter are utilized to improve the sensitivity of the receiver.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of an L-band superconducting anti-interference receiving front-end device of the present invention;

Description of labels:

1. Low-pass filter; 2. Gas switch; 3. First radio frequency switch; 4. Superconducting filter; 5. Second radio frequency switch; 6. Low noise amplifier; 7. Control board; 8. Refrigerator; 9. Power module; 10. Display screen; 11. Keyboard.

Detailed ways

In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

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

From the above description, it can be seen that the beneficial effects of the present invention are:

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 strong pulse suppression capability of the gas switch and the fast response capability of the superconducting filter are combined for use through mutual connection, thereby improving the anti-interference capability of the receiving front-end and protecting the subsequent electronic components from damage. At the same time, the low insertion loss and high out-of-band suppression capabilities of the superconducting filter are utilized to improve the sensitivity of the receiver.

Furthermore, the number of the superconducting filters is eight, and the first radio frequency switch and the second radio frequency switch are both single-pole eight-throw switches, and are respectively connected to the eight superconducting filters in a one-to-one correspondence.

From the above description, it can be seen that the single-pole eight-throw switch is used to switch 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 low-temperature space is used to place the superconducting filter. It is a vacuum space. Eight superconducting filters are placed in the low-temperature space, achieving coverage of the 960-1215GHz frequency band.

Furthermore, it also includes a refrigerator electrically connected to the control panel, and the output end of the refrigerator is connected to the low-temperature space.

From the above description, it can be seen that the refrigerator is used to cool the low-temperature space to ensure that the filter operates within the superconducting temperature range.

Furthermore, it also includes a power module, which is electrically connected to the first radio frequency switch, the second radio frequency switch, the control board and the refrigerator respectively.

It can be seen from the above description that the power module is used to supply power to the first RF switch, the second RF switch, the control board and the refrigerator.

Furthermore, the power supply 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 a 24V DC output, the second voltage conversion unit is used to convert the input 220V AC power into a 48V DC output, the input end of the first voltage conversion unit and the input end of the second voltage conversion unit are both electrically connected to the mains, the output end of the first voltage conversion unit is electrically connected to the first RF switch, the second RF switch and the control board, respectively, and the output end of the second voltage conversion unit is electrically connected to the refrigerator.

From the above description, it can be seen that the first voltage conversion unit and the second voltage conversion unit of the power module respectively convert the AC 220V voltage into a DC 48V power supply to power the refrigerator and convert the AC 220V voltage into a DC 28V to power the single-pole eight-throw switch and the control board.

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

Furthermore, the display device is a display screen; and the input device is a keyboard.

From the above description, it can be seen that the display screen is used to display the temperature of the refrigerator, the frequency of the current filter operation, and whether the device status is ready. The keyboard is used to set the operating frequency of the device and the temperature of the refrigerator.

Furthermore, the low noise amplifier is integrated at the proximal end of the superconducting filter.

It can be seen from the above description that the noise coefficient of the entire receiving link can be effectively reduced and the receiving sensitivity can be improved.

Referring to FIG1 , the first embodiment of the present invention is:

The present 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 refrigerator 8, a power module 9, a display screen 10 and a keyboard 11; the low-pass filter 1, the gas switch 2, the first radio frequency switch 3, the superconducting filter 4, the second radio frequency switch 5 and the low-noise amplifier 6 are electrically connected in sequence, the superconducting filter 4 is arranged in a low-temperature space, the first radio frequency switch 3 and the second radio frequency switch 5 are both controlled by the control board 7, that is, the first radio frequency switch and the second radio frequency switch are electrically connected to the control board respectively; the refrigerator 8 is electrically connected to the control board 7, and the output end of the refrigerator 8 is connected to the low-temperature space, and the refrigerator is used to cool the low-temperature space to ensure that the filter works within the superconducting temperature range.

It should be noted that the low-pass filter, the gas switch, the superconducting filter, the first radio frequency switch, the second radio frequency switch, the low-noise amplifier, the control board, the refrigerator, the power module, the display screen and the keyboard can all be existing products.

The control board 7 is used to control the single-pole eight-throw switch to switch different channels, and can also control the start and stop of the refrigerator.

The low-pass filter 1 can suppress the parasitic passband signal of the superconducting filter and suppress the interference signal at the high-frequency end. The gas switch can suppress the strong electromagnetic pulse signal of not less than 10kV/m;

The low noise amplifier 6 is integrated at the near end of the superconducting filter, which can effectively reduce the noise coefficient of the entire receiving link and improve the receiving sensitivity.

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 respectively. The power module 9 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 a 24V DC power output, the second voltage conversion unit is used to convert the input 220V AC power into a 48V DC power output, the input end of the first voltage conversion unit and the input end of the second voltage conversion unit are both electrically connected to the mains, the output end of the first voltage conversion unit is electrically connected to the first RF switch, the second RF switch and the control board respectively, and the output end of the second voltage conversion unit is electrically connected to the refrigerator. Through the first voltage conversion unit and the second voltage conversion unit of the power module, the AC 220V voltage is converted into a DC 48V power supply to power the refrigerator and the AC 220V voltage is converted into a DC 28V to power the single-pole eight-throw switch and the control board.

In this embodiment, the number of the superconducting filters 4 is eight, and the first RF switch 3 and the second RF switch 5 are both single-pole eight-throw switches, and are respectively connected to the eight superconducting filters in a one-to-one correspondence. The single-pole eight-throw switch is used to switch different paths. When the control board sets 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, which is a vacuum space. Eight superconducting filters are placed in the cryogenic space, achieving coverage of the 960-1215GHz frequency band.

The display screen 10 is electrically connected to the refrigerator and the control panel respectively, and is used to display the temperature of the refrigerator, the frequency of the current filter operation, and whether the device status is ready. The keyboard 11 is electrically connected to the control panel, and is used to set the operating frequency of the device and the temperature of the refrigerator.

In summary, the present invention provides an L-band superconducting anti-interference receiving front-end device, which 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 strong pulse suppression capability of the gas switch and the fast response capability of the superconducting filter are combined through the mutual connection relationship, thereby improving the anti-interference capability of the receiving front end and protecting the subsequent electronic components from damage. At the same time, the low insertion loss and high out-of-band suppression capabilities of the superconducting filter are utilized to improve the sensitivity of the receiver.

The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims (8)

1. An L-band superconductive anti-interference receiving front-end device, which is characterized in that: the low-pass filter, the gas switch, the superconducting filter, the first radio frequency switch, the second radio frequency switch, the low-noise amplifier and the control board are included; the low-pass filter, the gas switch, the first radio frequency switch, the superconducting filter, the second radio frequency switch and the low-noise amplifier are electrically connected in sequence, the superconducting filter is arranged in the low-temperature space, and the first radio frequency switch and the second radio frequency switch are controlled by the control board.

2. The L-band superconducting antijamming receive front-end device of claim 1, wherein: the number of the superconducting filters is eight, and the first radio frequency switch and the second radio frequency switch are single-pole eight-throw switches and are respectively connected with the eight superconducting filters in a one-to-one correspondence mode.

3. The L-band superconducting antijamming receive front-end device of claim 1, wherein: the refrigerator is electrically connected with the control panel, and the output end of the refrigerator is connected with the low-temperature space.

4. The L-band superconducting antijamming receive front-end device of claim 3, wherein: the refrigerator further comprises a power supply module which is electrically connected with the first radio frequency switch, the second radio frequency switch, the control panel and the refrigerator respectively.

5. The L-band superconducting antijamming receive front-end device of claim 4, wherein: the power module comprises a first voltage conversion unit and a second voltage conversion unit, wherein the first voltage conversion unit is used for converting input 220V alternating current into 24V direct current and outputting the 24V direct current, the second voltage conversion unit is used for converting the input 220V alternating current into 48V direct current and outputting the 48V direct current, the input end of the first voltage conversion unit and the input end of the second voltage conversion unit are electrically connected with the mains supply, the output end of the first voltage conversion unit is electrically connected with a first radio frequency switch, a second radio frequency switch and a control panel respectively, and the output end of the second voltage conversion unit is electrically connected with a refrigerating machine.

6. The L-band superconducting antijamming receive front-end device of claim 3, wherein: the refrigerator further comprises a display device and an input device, wherein the display device is electrically connected with the refrigerator and the control panel respectively, and the input device is electrically connected with the control panel.

7. The L-band superconducting antijamming receive front-end device of claim 6, wherein: the display device is a display screen; the input device is a keyboard.

8. The L-band superconducting antijamming receive front-end device of claim 1, wherein: the low noise amplifier is integrated in the proximal end of the superconducting filter.