Microstrip frequency hopping filter circuit and device

Abstract

The utility model relates to the field of microwave test and electronic countermeasure, in particular to a microstrip frequency hopping filter circuit and device, which comprises a coupling microstrip structure, a resonant switch assembly, a matching switch assembly and a control assembly, the resonant switch assembly is connected with the coupling end of the coupling microstrip structure and is used for adjusting the working frequency; the matching switch assembly is connected with the input end or the output end of the coupling microstrip structure and is used for matching and tuning; the control assembly controls the resonance switch assembly and the matching switch assembly to carry out frequency hopping filtering. By forming a coupling structure of the microstrip lines, coupling matching of the microstrip lines in the frequency hopping filter is achieved, in-band matching is kept during frequency modulation, and good standing waves and small in-band insertion loss fluctuation are achieved. And a good Chebyshev waveform is kept in a specified frequency hopping range, and meanwhile, standing waves and in-band insertion loss are not remarkably deteriorated. And the overall size can be greatly reduced, the production process is simplified, the assembly difficulty is reduced, the performance is reliable, and the cost is low.

Description

Technical Field

[0001] The utility model relates to the fields of microwave testing and electronic countermeasures, and more specifically to a microstrip frequency hopping filter circuit and a device. Background Art

[0002] Bandpass filters are the most commonly used filters in general communication systems. They allow only a limited number of signals to pass through, while filtering out all other signals. This plays a crucial role in electronic communications and is an effective means of combating electromagnetic interference. Frequency-hopping filters not only share the characteristics of traditional bandpass filters but also offer flexible configuration and variable passband frequencies, making them a crucial anti-interference measure in military communications. As communication systems increasingly demand electronic countermeasures, the need for frequency-band adjustability in frequency-hopping filters is increasing. Frequency-hopping filters are also widely used in multi-band, broadband, and frequency-hopping communications and radar systems.

[0003] Frequency-hopping filters are crucial components in the RF front-end of a system. Depending on the frequency hopping implementation method, they are primarily categorized as varactor-based, electrically tunable filters (ELTs), switched-capacitor matrix ELTs, cavity-based ELTs, and mechanical motor-tunable filters. ELTs, limited by the varactors themselves, have low power handling (typically below 20dBm) and high insertion loss, making them generally suitable only for receive links or small-signal transmit links. ELTs, limited by their multi-layer stacking structure, have low power handling (typically 10W) and high insertion loss. They are bulky and require high magnetic ring and inter-plate heights, making them unsuitable for high-power RF front-ends and low-noise receive front-ends. Cavity-based ELTs are bulky, costly, and require complex assembly processes. Mechanical motor-tunable filters have low frequency hopping rates and require motor control, resulting in bulky, slow switching speeds, and limited switching accuracy. Utility Model Content

[0004] The present invention aims to overcome at least one defect (shortcoming) of the above-mentioned prior art and provide a microstrip frequency hopping filter circuit and device for solving the problem that the existing frequency hopping filter cannot achieve low insertion loss, small size and good adaptability.

[0005] The technical solution adopted by the utility model is a microstrip frequency hopping filter circuit, comprising: a coupled microstrip structure, a resonant switch component, a matching switch component and a control component; the resonant switch component is connected to the coupling end of the coupled microstrip structure for adjusting the operating frequency; the matching switch component is connected to the input end or the output end of the coupled microstrip structure for matching and tuning; the control component controls the resonant switch component and the matching switch component to perform frequency hopping filtering respectively.

[0006] The coupled microstrip structure includes: a first microstrip branch and a second microstrip branch; one end of the first microstrip branch is connected to the input end, and the other end is connected to the coupling end through a resonant switch component; one end of the second microstrip branch is connected to the output end, and the other end is connected to the coupling end through a resonant switch component.

[0007] The first microstrip branch includes: a first microstrip line and a second microstrip line arranged in series; one end of the first microstrip line is connected to the input port, and the other end is connected to the second microstrip line; the end of the second microstrip line away from the first microstrip line is connected to the resonant switch component; and / or, the second microstrip branch includes: a third microstrip line and a fourth microstrip line arranged in series; one end of the third microstrip line is connected to the output port, and the other end is connected to the fourth microstrip line; the end of the fourth microstrip line away from the third microstrip line is connected to the resonant switch component.

[0008] The resonant switch component includes: a first resonant component and a second resonant component; the first microstrip branch is connected to the coupling end through the first resonant component; the second microstrip branch is connected to the coupling end through the second resonant component.

[0009] The first resonant component is a first resonant switch capacitor matrix; the input end of the first resonant switch capacitor matrix is connected to the first microstrip branch, and the output end of the first resonant switch capacitor matrix is connected to the coupling end; and / or, the second resonant component is a second resonant switch capacitor matrix; the input end of the second resonant switch capacitor matrix is connected to the second microstrip branch, and the output end of the second resonant switch capacitor matrix is connected to the coupling end.

[0010] The matching switch component includes: a first matching component and a second matching component; the input end is connected to the coupling end through the first matching component; and the output end is connected to the coupling end through the second matching component.

[0011] The first matching component is a first matching switch capacitor matrix; the input end of the first matching switch capacitor matrix is connected to the coupling end; the output end of the first matching switch capacitor matrix is connected to the coupling end; and / or, the second matching component is a second matching switch capacitor matrix; the input end of the second matching switch capacitor matrix is connected to the coupling end; and the output end of the second matching switch capacitor matrix is connected to the coupling end.

[0012] The control component includes: a memory, a drive isolation chip and a control switch group; the drive isolation chip receives an external signal, reads the preset data in the memory, and adjusts the resonant switch component and the matching switch component through the control switch group.

[0013] The control component includes: a memory, a drive isolation chip and a control switch group; the memory includes: a first memory and a second memory; the drive isolation chip includes: a first driver chip and a second driver chip; the control switch group includes: a first PIN tube chip switch group and a second PIN tube chip switch group; the first driver chip receives an external signal, reads the preset data in the first memory, and adjusts the resonant switch component through the first PIN tube chip switch group; the second driver chip receives an external signal, reads the preset data in the second memory, and adjusts the matching switch component through the second PIN tube chip switch group.

[0014] Furthermore, a microstrip frequency hopping filter device is provided, comprising: a shielding shell, a PCB board arranged in the shielding shell, and an input connector and an output connector arranged on the PCB; the PCB board is provided with the microstrip frequency hopping filter circuit, the input port is connected to the input connector, and the output port is connected to the output connector.

[0015] Compared with existing technologies, the present invention achieves the following advantages: by forming a coupled microstrip structure, it achieves coupled matching of the microstrip lines in the frequency hopping filter, maintains in-band matching during frequency modulation, and achieves good standing wave and minimal in-band insertion loss fluctuation. It also maintains a good Chebyshev waveform within the specified frequency hopping range, while maintaining minimal degradation of standing wave and in-band insertion loss. This also simplifies the overall structural design, significantly reducing size, simplifying the production process, reducing assembly complexity, and ensuring reliable performance at a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the circuit of the microstrip frequency hopping filter circuit in this utility model Figure 1 .

[0017] Figure 2 This is the circuit of the microstrip frequency hopping filter circuit in the utility model Figure 2 .

[0018] Figure 3 This is a front view of the PCB board of the microstrip frequency hopping filter device in the present invention.

[0019] Figure 4 This is a back view of the PCB board of the microstrip frequency hopping filter device in the present invention.

[0020] Figure 5 This is a three-dimensional view of the microstrip frequency hopping filter device in the utility model.

[0021] Figure 6 This is a simulation test curve diagram of the microstrip frequency hopping filter device in the utility model.

[0022] Figure 7This is a measured curve diagram of the microstrip frequency hopping filter device in the utility model.

[0023] Figure 8 This is a structural diagram of the microstrip frequency hopping filter device in the present invention.

[0024] Explanation of the accompanying drawings: coupled microstrip structure 100, first microstrip branch 110, first microstrip line 111, second microstrip line 112, second microstrip branch 120, third microstrip line 121, fourth microstrip line 122, resonant switch component 200, first resonant component 210, second resonant component 220, matching switch component 300, first matching component 310, second matching component 320, coupling end 401, input end 402, output end 403, unidirectional capacitor branch 404, input connector 501, output connector 502, PCB board 504, first driver chip 511, second driver chip 512, first reservoir 521, second reservoir 522, first PIN tube chip switch group 531, second PIN tube chip switch group 532, cover 541, base 542. DETAILED DESCRIPTION

[0025] The drawings in this utility model are for illustrative purposes only and are not to be construed as limiting the scope of this utility model. To better illustrate the following embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent the actual dimensions of the products. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted from the drawings.

[0026] Example 1

[0027] like Figure 1 As shown, this embodiment is a microstrip frequency hopping filter circuit, comprising: a coupled microstrip structure 100, a resonant switch component 200, a matching switch component 300, and a control component; the resonant switch component 200 is connected to the coupling end 401 of the coupled microstrip structure 100 for adjusting the operating frequency; the matching switch component 300 is connected to the input end 402 or the output end 403 of the coupled microstrip structure 100 for matching and tuning; the control component controls the resonant switch component 200 and the matching switch component 300 to perform frequency hopping filtering.

[0028] By forming a coupled microstrip structure, the coupled microstrip lines in the frequency-hopping filter are matched and maintained within the frequency band during frequency modulation, achieving good standing wave patterns and minimal insertion loss fluctuations. This maintains a good Chebyshev waveform within the specified frequency-hopping range, while minimizing standing wave patterns and insertion loss. This simplifies the overall structural design, significantly reducing size, simplifying the production process, and reducing assembly complexity, resulting in reliable performance and low cost.

[0029] The coupled microstrip structure 100 includes: a first microstrip branch 110 and a second microstrip branch 120; one end of the first microstrip branch 110 is connected to the input end 402, and the other end is connected to the coupling end 401 through the resonant switch component 200; one end of the second microstrip branch 120 is connected to the output end 403, and the other end is connected to the coupling end 401 through the resonant switch component 200.

[0030] like Figure 2 As shown, the first microstrip branch 110 includes: a first microstrip line 111 and a second microstrip line 112 arranged in series; one end of the first microstrip line 111 is connected to the input port, and the other end is connected to the second microstrip line 112; the end of the second microstrip line 112 away from the first microstrip line 111 is connected to the resonant switch component 200; the second microstrip branch 120 includes: a third microstrip line 121 and a fourth microstrip line 122 arranged in series; one end of the third microstrip line 121 is connected to the output port, and the other end is connected to the fourth microstrip line 122; the end of the fourth microstrip line 122 away from the third microstrip line 121 is connected to the resonant switch component 200.

[0031] The resonant switch component 200 includes: a first resonant component 210 and a second resonant component 220 ; the first microstrip branch 110 is connected to the coupling end 401 via the first resonant component 210 ; the second microstrip branch 120 is connected to the coupling end 401 via the second resonant component 220 .

[0032] The first resonant component 210 is a first resonant switch capacitor matrix; the input end of the first resonant switch capacitor matrix is connected to the first microstrip branch 110, and the output end of the first resonant switch capacitor matrix is connected to the coupling end 401; the second resonant component 220 is a second resonant switch capacitor matrix; the input end of the second resonant switch capacitor matrix is connected to the second microstrip branch 120, and the output end of the second resonant switch capacitor matrix is connected to the coupling end 401.

[0033] By combining a switched capacitor matrix with a microstrip line as the frequency hopping resonance mode of the frequency hopping filter circuit, the accuracy of the frequency hopping filter circuit can be improved and precise frequency changes can be achieved. Moreover, after the control parameters are solidified, it can meet the requirements of one-piece molding, greatly reducing the debugging work in the traditional filter production process.

[0034] In this embodiment, the resonant switched capacitor matrix includes six single-phase capacitor branches, and unidirectional capacitor branch 404 includes a capacitor and a diode connected in series. The input end of unidirectional capacitor branch 404 is connected to one end of the capacitor, the other end of the capacitor is connected to the input end of the diode, and the output end of the diode is connected to the output end of unidirectional capacitor branch 404.

[0035] The matching switch component 300 includes a first matching component 310 and a second matching component 320. The input terminal 402 is connected to the coupling terminal 401 via the first matching component 310, and the output terminal 403 is connected to the coupling terminal 401 via the second matching component 320. The first matching component 310 is a first matching switch capacitor matrix; the input terminal of the first matching switch capacitor matrix is connected to the coupling terminal 401; the output terminal of the first matching switch capacitor matrix is connected to the coupling terminal 401; the second matching component 320 is a second matching switch capacitor matrix; the input terminal of the second matching switch capacitor matrix is connected to the coupling terminal 401; the output terminal of the second matching switch capacitor matrix is connected to the coupling terminal 401.

[0036] Using a switched capacitor matrix to adjust the matching of the frequency hopping filter circuit and adjust the filter circuit matching can make the frequency hopping filter have a better frequency response during frequency tuning. In this embodiment, the matched switched capacitor matrix has six single-phase capacitor branches, and the unidirectional capacitor branch 404 includes a capacitor and a diode arranged in series. The input end of the unidirectional capacitor branch 404 is connected to one end of the capacitor, the other end of the capacitor is connected to the input end of the diode, and the output end of the diode is connected to the output end of the unidirectional capacitor branch 404.

[0037] The control component includes: a memory, a drive isolation chip and a control switch group; the drive isolation chip receives an external signal, reads the preset data in the memory, and adjusts the resonant switch component 200 and the matching switch component 300 through the control switch group.

[0038] The control component includes: a memory, a drive isolation chip and a control switch group; the memory includes: a first storage 521 and a second storage 522; the drive isolation chip includes: a first drive chip 511 and a second drive chip 512; the control switch group includes: a first PIN tube chip switch group 531 and a second PIN tube chip switch group 532; the first drive chip 511 receives an external signal, reads the preset data in the first storage 521, and adjusts the resonant switch component 200 through the first PIN tube chip switch group 531; the second drive chip 512 receives an external signal, reads the preset data in the second storage 522, and adjusts the matching switch component 300 through the second PIN tube chip switch group 532.

[0039] The first memory 521 and the second memory 522 can make the control data independent, reduce interference, and improve the operation and reading speed. At the same time, the use of dual memory control method can effectively achieve synchronous frequency adjustment and matching, and can meet the special matching of the adjustment filter according to the usage situation, greatly improving the adaptability of the frequency hopping filter.

[0040] Example 2

[0041] like Figure 5 and Figure 8 As shown, this embodiment is a microstrip frequency hopping filter device, comprising: a shielding shell, a PCB board 504 arranged in the shielding shell, and an input connector 501 and an output connector 502 arranged on the PCB; it is characterized in that a microstrip frequency hopping filter circuit is provided on the PCB board 504, the input port is connected to the input connector 501, and the output port is connected to the output connector 502.

[0042] The microstrip frequency-hopping filter circuit includes a coupled microstrip structure 100, a resonant switch component 200, a matching switch component 300, and a control component. The resonant switch component 200 is connected to the coupling end 401 of the coupled microstrip structure 100 for adjusting the operating frequency. The matching switch component 300 is connected to the input end 402 or the output end 403 of the coupled microstrip structure 100 for matching and tuning. The control component controls the resonant switch component 200 and the matching switch component 300 to perform frequency-hopping filtering. The coupling structure of the microstrip line can be specifically designed using the coupling bandwidth method. It has excellent frequency response characteristics, with insertion loss less than 2.5dB and return loss less than 20dB. It also has high power tolerance, capable of passing power exceeding 100W.

[0043] The coupled microstrip structure 100 includes: a first microstrip branch 110 and a second microstrip branch 120; one end of the first microstrip branch 110 is connected to the input end 402, and the other end is connected to the coupling end 401 through the resonant switch component 200; one end of the second microstrip branch 120 is connected to the output end 403, and the other end is connected to the coupling end 401 through the resonant switch component 200.

[0044] The first microstrip branch 110 includes a first microstrip line 111 and a second microstrip line 112 arranged in series. One end of the first microstrip line 111 is connected to the input port, and the other end is connected to the second microstrip line 112. The end of the second microstrip line 112, remote from the first microstrip line 111, is connected to the resonant switch component 200. The second microstrip branch 120 includes a third microstrip line 121 and a fourth microstrip line 122 arranged in series. One end of the third microstrip line 121 is connected to the output port, and the other end is connected to the fourth microstrip line 122. The end of the fourth microstrip line 122, remote from the third microstrip line 121, is connected to the resonant switch component 200. The coupled microstrip structure 100 forms a fourth-order structure.

[0045] The resonant switch component 200 includes: a first resonant component 210 and a second resonant component 220 ; the first microstrip branch 110 is connected to the coupling end 401 via the first resonant component 210 ; the second microstrip branch 120 is connected to the coupling end 401 via the second resonant component 220 .

[0046] The first resonant component 210 is a first resonant switch capacitor matrix; the input end of the first resonant switch capacitor matrix is connected to the first microstrip branch 110, and the output end of the first resonant switch capacitor matrix is connected to the coupling end 401; the second resonant component 220 is a second resonant switch capacitor matrix; the input end of the second resonant switch capacitor matrix is connected to the second microstrip branch 120, and the output end of the second resonant switch capacitor matrix is connected to the coupling end 401.

[0047] The two resonant switch capacitor matrices are both located at the coupling end 401 of the microstrip line. The operating frequency of the microstrip frequency hopping filter circuit can be changed by adjusting the resonant capacitance value of the PIN transistor chip. The first resonant switch capacitor matrix and / or the first resonant switch capacitor matrix include multiple parallel unidirectional capacitor branches 404. In this embodiment, Figure 3 As can be seen from the number of components on the PCB board 504 , there are five unidirectional capacitor branches 404 . In actual operation, the number of unidirectional capacitor branches 404 can be adjusted according to actual needs.

[0048] The matching switch component 300 includes: a first matching component 310 and a second matching component 320 ; the input end 402 is connected to the coupling end 401 through the first matching component 310 ; and the output end 403 is connected to the coupling end 401 through the second matching component 320 .

[0049] The first matching component 310 is a first matching switch capacitor matrix; the input end of the first matching switch capacitor matrix is connected to the coupling end 401; the output end of the first matching switch capacitor matrix is connected to the coupling end 401; the second matching component 320 is a second matching switch capacitor matrix; the input end of the second matching switch capacitor matrix is connected to the coupling end 401; the output end of the second matching switch capacitor matrix is connected to the coupling end 401.

[0050] Two matching switch capacitor matrices are located at the input port and the output port respectively, and the matching capacitance value of the PIN transistor chip can be adjusted to achieve matching tuning of the frequency hopping filter circuit. Figure 3 As can be seen from the number of components on the PCB board 504 , there are five unidirectional capacitor branches 404 . In actual operation, the number of unidirectional capacitor branches 404 can be adjusted according to actual needs.

[0051] like Figure 3 and Figure 4As shown, the control component includes: a memory, a driver isolation chip and a control switch group; the driver isolation chip receives external signals, reads the preset data in the memory, and adjusts the resonant switch component 200 and the matching switch component 300 through the control switch group. The control component includes: a memory, a driver isolation chip and a control switch group; the memory includes: a first memory 521 and a second memory 522; the driver isolation chip includes: a first driver chip 511 and a second driver chip 512; the control switch group includes: a first PIN transistor chip switch group 531 and a second PIN transistor chip switch group 532; the first driver chip 511 receives external signals, reads the preset data in the first memory 521, and adjusts the resonant switch component 200 through the first PIN transistor chip switch group 531; the second driver chip 512 receives external signals, reads the preset data in the second memory 522, and adjusts the matching switch component 300 through the second PIN transistor chip switch group 532.

[0052] In this embodiment, the capacitance value selection of both the resonant switch component 200 and the matching switch component 300 is controlled by a PIN transistor switch chip. Under the control of the PIN transistor switch chip, the capacitance of the capacitor matrix can be changed. The first memory 521 can specifically store the data required for capacitance adjustment in the resonant switch component 200, while the second memory 522 can specifically store the data required for capacitance adjustment in the matching switch component 300. The external signal can specifically be an external address code. After the driver isolation chip obtains the external address code, it can accurately retrieve the data in the memory to adjust the capacitance value.

[0053] Specifically, the first memory stores the capacitance data of the resonant switch component 200, and calls the internal data of the first memory through the external address code to control the first driver chip 511 to output a voltage signal to the first PIN tube chip switch group 531. The first PIN tube chip switch group 531 controls the first resonant switch capacitance matrix and the second resonant switch capacitance matrix to adjust the capacitance value of the resonant switch component 200.

[0054] The second memory stores the capacitance data of the matching switch component 300. Through the external address code, the internal data of the second memory is called to control the second driver chip 512 to output a voltage signal to the second PIN tube chip switch group 532. The second PIN tube chip switch group 532 controls the first matching switch capacitance matrix and the second matching switch capacitance matrix to adjust the capacitance value of the matching switch component 300.

[0055] In this embodiment, the memory is a memory chip, model SST39VF400A-70-4I-B3KE. The driver isolation chip is a driver module MOS transistor, model MMDT5551. The control switch group is a PIN transistor, model SMP1320-075LF.

[0056] By adopting a dual-storage control method, the resonant frequency and matching parameters are controlled synchronously. This allows the filter's center frequency to be precisely adjusted while also adjusting the filter's input and output matching, significantly improving the filter's adaptability. Furthermore, the structure has the advantages of simple implementation and low cost, making it highly applicable.

[0057] In this embodiment, the dielectric constant of the PCB board 504 during processing is 2.2, and the surface is treated with immersion gold. The shielding shell includes a base 542 and a cover 541. The base 542 is provided with a cavity. The PCB board 504 is fixed in the base 542 by bolts, and the cover 541 and the base 542 form a threaded connection. The relationship between the capacitance value of the resonant switch component 200 and the frequency of the frequency hopping filter is that the resonant capacitance value increases, and at the same time, the capacitance value of the matching switch component 300 is adjusted to reduce the frequency. The key corresponding to the specific resonant switch component 200, the matching switch component 300 and the center frequency is shown in the following table:

[0058] Table 1: Correspondence between the resonant switch component 200, the matching switch component 300 and the center frequency:

[0059]

[0060] According to the above table, the simulation results are as follows Figure 6 From the frequency response lines, it can be seen that the frequency range of the microstrip frequency hopping filter is 1.0GHz to 2.0GHz, the standing wave and insertion loss are good, and the insertion loss of the entire section is less than 2.2dB. After the simulation, the actual measurement shows that the capacitance value of the resonant switch component 200 is 5pF, and the capacitance value of the matching switch component 300 is 14pF. Figure 7 As shown, the center frequency of the measured frequency response curve is 1060MHz, and it has a good Chebyshev waveform. The insertion loss is 2.1dB, which is also less than 2.2dB.

[0061] Using microstrip line coupling as the resonant element of the filter circuit eliminates the need for magnetic rings or cavity structures, thereby reducing the size and height of the filter. The frequency-hopping filter circuit formed by microstrip coupling has a fast frequency response. Flexible adjustment of the resonant capacitor allows for frequency change, resulting in a wide frequency-hopping range. Furthermore, the standing wave and insertion loss curves are well maintained during frequency range adjustment. Furthermore, a switched capacitor matrix combined with microstrip lines is used as the resonant element for frequency hopping, and the switched capacitor matrix is used to adjust the input and output matching of the filter circuit. Finally, a dual-storage control method is used to synchronously control frequency tuning and matching.

[0062] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the technical solution of the present invention, and are not intended to limit the specific implementation methods of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A microstrip frequency hopping filter circuit, characterized in that: include: coupled microstrip structures, resonant switch components, matching switch components, and control components; The resonant switch component is connected to the coupling end of the coupling microstrip structure and is used to adjust the operating frequency; The matching switch component is connected to the input end or the output end of the coupled microstrip structure for matching tuning; The control component controls the resonant switch component and the matching switch component to perform frequency hopping filtering respectively.

2. A microstrip frequency hopping filter circuit according to claim 1, characterized in that: The coupled microstrip structure includes: a first microstrip branch and a second microstrip branch; One end of the first microstrip branch is connected to the input end, and the other end is connected to the coupling end via a resonant switch component; One end of the second microstrip branch is connected to the output end, and the other end is connected to the coupling end via a resonant switch component.

3. A microstrip frequency hopping filter circuit according to claim 2, characterized in that: The first microstrip branch includes: a first microstrip line and a second microstrip line arranged in series; One end of the first microstrip line is connected to the input end, and the other end is connected to the second microstrip line; One end of the second microstrip line away from the first microstrip line is connected to the resonant switch component; and / or, The second microstrip branch includes: a third microstrip line and a fourth microstrip line arranged in series; One end of the third microstrip line is connected to the output end, and the other end is connected to the fourth microstrip line; One end of the fourth microstrip line away from the third microstrip line is connected to the resonant switch component.

4. A microstrip frequency hopping filter circuit according to any one of claims 2 to 3, characterized in that: The resonant switch component includes: a first resonant component and a second resonant component; The first microstrip branch is connected to the coupling end through a first resonant component; The second microstrip branch is connected to the coupling end through a second resonant component.

5. A microstrip frequency hopping filter circuit according to claim 4, characterized in that: The first resonant component is a first resonant switch capacitor matrix; The input end of the first resonant switch capacitor matrix is connected to the first microstrip branch, and the output end of the first resonant switch capacitor matrix is connected to the coupling end; and / or, The second resonant component is a second resonant switched capacitor matrix; The input end of the second resonant switch capacitor matrix is connected to the second microstrip branch, and the output end of the second resonant switch capacitor matrix is connected to the coupling end.

6. A microstrip frequency hopping filter circuit according to any one of claims 1 to 3, characterized in that: The matching switch component includes: a first matching component and a second matching component; The input end is connected to the coupling end through a first matching component; The output end is connected to the coupling end through a second matching component.

7. The microstrip frequency hopping filter circuit according to claim 6, characterized in that: The first matching component is a first matching switch capacitor matrix; The access end of the first matching switch capacitor matrix is connected to the coupling end; The output terminal of the first matching switch capacitor matrix is connected to the coupling terminal; and / or, The second matching component is a second matching switch capacitor matrix; The access end of the second matching switch capacitor matrix is connected to the coupling end; An output terminal of the second matching switch capacitor matrix is connected to the coupling terminal.

8. A microstrip frequency hopping filter circuit according to any one of claims 1 to 3, characterized in that: The control component includes: a memory, a drive isolation chip and a control switch group; The drive isolation chip receives an external signal, reads data preset in a memory, and adjusts the resonant switch component and the matching switch component by controlling the switch group.

9. The microstrip frequency hopping filter circuit according to claim 1, characterized in that: The control component includes: a memory, a drive isolation chip and a control switch group; The memory includes: a first memory and a second memory; The drive isolation chip includes: a first drive chip and a second drive chip; The control switch group includes: a first PIN tube chip switch group and a second PIN tube chip switch group; The first driver chip receives an external signal, reads the preset data in the first storage, and adjusts the resonant switch component through the first PIN transistor chip switch group; The second driver chip receives an external signal, reads the preset data in the second storage, and adjusts the matching switch component through the second PIN tube chip switch group.

10. A microstrip frequency hopping filter device, comprising: A shielding shell, a PCB board arranged in the shielding shell, and an input connector and an output connector arranged on the PCB; characterized in that the PCB board is provided with a microstrip frequency hopping filter circuit according to any one of claims 1 to 9, the input end is connected to the input connector, and the output end is connected to the output connector.

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