P-band high-power filtering amplitude limiting assembly

Abstract

The invention discloses a P-band high-power filtering and amplitude limiting assembly, which belongs to the technical field of microwaves and comprises a filter, an amplitude limiter, a polarizer, a coupler and a metal cavity. The amplitude limiter is installed on the bottom layer of the metal cavity, the filter and the polarizer are installed on the top layer of the metal cavity, the coupler is installed on the side wall of the metal cavity, the filter, the low-pass filter and the polarizer are connected in a wall-penetrating welding mode through a 50-ohm metal connecting rod, and the polarizer is fixed to the metal cavity through a medium supporting column. The whole assembly belongs to an upper-lower layer structure. According to the assembly, the transmission path between devices is shortened, the emission loss of the assembly is reduced, the size of the filtering and amplitude limiting assembly is greatly reduced under the condition that composite multiple functions are met, and the purposes of high power and high integration are achieved.

Description

Technical Field

[0001] This invention belongs to the field of microwave technology, specifically relating to a P-band high-power filtering and limiting component. Background Technology

[0002] The filtering and limiting component consists of a filter, a limiter, a polarizer, and a coupler. The main frequency signal from the signal source is amplified by a power amplifier and then protected by a high-power isolator. The signal is filtered at the input port of the filtering and limiting component. The output of the filter is connected to the input of a low-pass filter, and the output of the low-pass filter is connected to the input of the polarizer, splitting the signal in two for orthogonal polarization at the output of the filtering and limiting component. The signal is then transmitted via an antenna. Simultaneously, the coupler monitors the signal at one end of the polarizer output. The antenna-reflected signal is transmitted through the polarizer to the input of the limiter. The high-power signal is then output by the limiter to the receiver for digital signal processing. This component shortens the transmission path between components, reduces transmission loss, and significantly reduces the size of the filtering and limiting component while meeting multi-functional requirements, achieving high power and high integration. The component is easy to install and debug, has a simple and compact structure, stable and reliable performance, is easy to maintain, and effectively reduces costs.

[0003] The high power, multi-functionality, and high integration requirements of active phased array radar have driven the development of highly integrated filter and limiting components, presenting a trade-off between cost, size, and electrical performance. Compared to directly assembling individual filters, limiters, polarizers, and couplers, filter and limiting components are easier to install and occupy less space. A two-layer structure is adopted: the limiter is installed at the bottom layer of the metal cavity, the filter and polarizer are installed at the top layer, and the coupler is installed on the side wall of the metal cavity. This reduces the component installation area, achieves high integration, and shortens the transmission path between the filter, limiter, polarizer, and coupler. Summary of the Invention

[0004] The purpose of this invention is to propose a P-band high-power filter limiting component. This component uses a high-power filter as its core, with other functional devices extending into three-dimensional space through a planar structure, reducing the component's footprint, facilitating installation and debugging, and better achieving multifunctionality, low cost, high integration, and miniaturization.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: A P-band high-power filter limiting component, the structure of which includes a filter, a limiter, a polarizer and a coupler, and a metal cavity, characterized in that:

[0006] The limiter is installed at the bottom of the metal cavity, the filter and polarizer are installed at the top of the metal cavity, the coupler is installed on the side wall of the metal cavity, the interconnection between the filter and polarizer is achieved by through-wall welding of metal connecting rods, and the polarizer and filter share the same filter polarization cover plate. The first connector and the second connector are installed on the left and right sides of the metal cavity, and the third connector and the fourth connector are installed on the bottom surface of the limiter. The top cover plate, the side cover plate and the metal cavity are welded by laser sealing. The entire assembly is a two-layer structure.

[0007] The filter is a coaxial cavity structure, which includes five resonant rods. Each resonant rod is mounted on one side wall of the metal cavity with a fastening screw, while a tuning screw passes through the other side wall of the metal cavity and enters the resonant rod. There is a polytetrafluoroethylene medium between the resonant rod and the tuning screw.

[0008] The polarizer is a parallel coupling structure, which includes an upper planar metal sheet and a lower planar metal sheet. A dielectric sheet is provided between the upper and lower planar metal sheets. The dielectric sheet is fixed to the metal cavity by screwing the dielectric support column through the dielectric sleeve. The thickness of the dielectric sheet controls the gap between the upper and lower planar metal sheets. The thickness of the inner cavity of the polarizer at the top of the metal cavity is equal to the sum of the effective parts of the combination of the upper planar metal sheet, the lower planar metal sheet, the dielectric sheet, the dielectric support column, and the dielectric sleeve.

[0009] The coupler is a single-wavelength directional coupler, which includes a coupling metal plate and a coupling printed circuit board. The coupling method is achieved by using the upper plane metal plate in the polarizer and the coupling metal plate. Both ends of the coupling metal plate are soldered to the coupling printed circuit board. One end is soldered to the connector coupling port through a cable assembly, and the other end is soldered to a resistor through the coupling printed circuit board.

[0010] The filter includes a first metal tap and a second metal tap. One end of the second metal tap is welded to the first connector, and the other end is welded to the first and second resonant rods. One end of the low-pass filter is welded to the first metal tap of the last resonant rod, and the other end is welded to the upper plane metal sheet in the polarizer through an ohmic metal connecting rod. The low-pass filter is fixed to the metal cavity by a polytetrafluoroethylene dielectric fixing block to achieve signal interconnection.

[0011] In the polarizer, one end of the upper flat metal plate is welded to the ohmic metal connecting rod, and the other end is welded to the input connector. One end of the lower flat metal plate is welded to the connector, and the other end is welded to the input end of the limiter. The limiter is installed on the metal cavity by means of fastening screws.

[0012] The first connector is a φ.mm glass insulator, the second connector is a TMA connector, and the third and fourth connectors are both SMP connectors.

[0013] The metal cavity is made of aluminum alloy and is silver-plated.

[0014] The beneficial effects of this invention: This invention provides a P-band high-power filtering and limiting component.

[0015] The main frequency signal from the signal source is amplified by a power amplifier and then connected to a high-power isolator for protection. The signal is filtered through the input port of the filter limiting component. The output of the filter is connected to the input of a low-pass filter, and the output of the low-pass filter is connected to the input of a polarizer. The signal is split into two and sent to the output of the filter limiting component to achieve orthogonal polarization. The signal is then transmitted through the antenna. At the same time, the coupler monitors the signal at one end of the polarizer output. The antenna-reflected signal is transmitted through the polarizer to the input of the limiter. The high-power signal is output through the limiter to the receiver for digital signal processing.

[0016] This component shortens the transmission path between devices and reduces transmission loss. While meeting multi-functional requirements, it significantly reduces the size of the filter and limiting component, achieving high power and high integration. The component is easy to install and debug, with a simple and compact structure, stable and reliable performance, and easy maintenance. It effectively reduces costs and can be applied to military communication systems, such as active phased array radars, as well as civilian weather radars. Attached Figure Description

[0017] Figure 1 This is a circuit schematic diagram of a P-band high-power filter limiting component.

[0018] Figure 2 This is a schematic diagram of a P-band high-power filter limiting component.

[0019] Figure 3 This is a schematic diagram of the top-level filter and polarizer of a P-band high-power filtering and limiting component.

[0020] Figure 4 This is a schematic diagram of the cross-section of a filter and a low-pass filter in a P-band high-power filtering and limiting component.

[0021] Figure 5 This is a schematic diagram of the polarizer cross-section of a P-band high-power filter limiting component.

[0022] Figure 6 This is a schematic diagram of the bottom limiter of a P-band high-power filter limiting component.

[0023] In the diagram, 1 is a filter, 2 is a limiter, 3 is a polarizer, 4 is a coupler, 5 is a metal cavity, 6 is the first connector, 7 is a resonant rod, 8 is a filter polarization cover plate, 9 is the cavity top cover plate, 10 is a side cover plate, 11 is the second connector, 12 is the upper flat metal plate, 13 is the lower flat metal plate, 14 is the coupling metal plate, 15 is the cable assembly, 16 is the dielectric sleeve, 17 is the PTFE dielectric, 18 is the first metal tap, 19 is the metal connecting rod, 20 is the low-pass filter, 21 is the tuning screw, 22 is the fastening screw, 23 is the PTFE fixing block, 24 is the dielectric support post, 25 is the third connector, 26 is the fourth connector, 27 is the dielectric sheet, 28 is the coupling printed circuit board, and 29 is the second metal tap. Detailed Implementation

[0024] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] In this embodiment of the invention, a P-band high-power filtering and limiting component is described. Please refer to [link to relevant documentation]. Figures 1-6 As shown, its structure includes a filter 1, a limiter 2, a polarizer 3, a coupler 4, a metal cavity 5, a filter polarization cover plate 8, a cavity upper cover plate 9, a side cover plate 10, a metal tap 18, an upper flat metal sheet 12, a lower flat metal sheet 13, a low-pass filter 20, a polytetrafluoroethylene fixing block 23, a dielectric support column 24, a dielectric sleeve 16, a coupling printed circuit board 28, a coupling metal sheet 14, a cable assembly 15, and a first connector 6.

[0026] The limiter 2 is installed at the bottom of the metal cavity 5, the filter 1 and the polarizer 3 are installed at the top of the metal cavity 5, and the coupler 4 is installed on the side wall of the metal cavity 5. The interconnection between the filter 1, the low-pass filter 24 and the polarizer 3 is achieved by through-wall welding with a 50-ohm metal connecting rod 19. The polarizer 3 is fixed to the metal cavity 5 by a dielectric support column 24. At the same time, the polarizer 3 and the filter 1 share the same filter polarization cover plate 8. Tuning screws 21 and fastening screws 22 are provided on the front and rear sides of the metal cavity 5. The first connector 6 and the second connector 11 are installed on the left and right sides of the metal cavity 5. The bottom surface of the limiter 2 is equipped with a third connector 25 and a fourth connector 26. The upper cover plate 9, the side cover plate 10 and the metal cavity 5 are welded by laser sealing. The entire assembly is a top-bottom structure.

[0027] The filter 1 is a coaxial cavity structure, which includes five resonant rods 7. Each resonant rod is mounted on one side wall of the metal cavity 5 by a fastening screw 22. At the same time, the tuning screw 21 passes through the other side wall of the metal cavity 5 and enters the resonant rod 7. There is a polytetrafluoroethylene medium 17 between the resonant rod 7 and the tuning screw 21.

[0028] The polarizer 3 is a parallel coupling structure, which includes an upper flat metal sheet 12 and a lower flat metal sheet 13. A dielectric sheet 27 is provided between the upper flat metal sheet 12 and the lower flat metal sheet 13. The dielectric sheet 27 is fixed to the metal cavity 5 by rotating the dielectric support column 24 through the dielectric sleeve 16. The thickness of the dielectric sheet 27 controls the gap between the upper flat metal sheet 12 and the lower flat metal sheet 13. The thickness of the inner cavity of the polarizer 3 at the top of the metal cavity 5 is equal to the sum of the effective parts of the combination of the upper flat metal sheet 12, the lower flat metal sheet 13, the dielectric sheet 27, the dielectric support column 24, and the dielectric sleeve 16.

[0029] The coupler 4 is a 1 / 4 wavelength single-stage directional coupler. The coupler 4 includes a coupling metal sheet 14 and a coupling printed circuit board 28. The coupling method is achieved by using the upper plane metal sheet 12 in the polarizer 3 and the coupling metal sheet 14. Both ends of the coupling metal sheet 14 are soldered to the coupling printed circuit board 28. One end is soldered to the coupling port of the third connector 25 through the cable assembly 15, and the other end is soldered to the resistor through the coupling printed circuit board 28.

[0030] like Figure 3 As shown, the filter is provided with a first metal tap 18 and a second metal tap 29. One end of the second metal tap 29 is welded to the connector 6, and the other end is welded to the first resonant rod 7. One end of the low-pass filter 20 is welded to the last resonant rod 7 and the first metal tap 18, and the other end is welded to the upper plane metal plate 12 in the polarizer 3 through a 50-ohm metal connecting rod 19. The low-pass filter 20 is fixed to the metal cavity 5 through a polytetrafluoroethylene dielectric fixing block 23 to realize signal interconnection.

[0031] like Figure 4 As shown, in the polarizer 3, one end of the upper flat metal plate 12 is welded to the 50-ohm metal connecting rod 19, and the other end is welded to the input connector 11. One end of the lower flat metal plate 13 is welded to the connector 11, and the other end is welded to the input end of the limiter 2. The limiter 2 is installed on the metal cavity 5 by means of fastening screws.

[0032] Furthermore, the first connector 6 is a φ1.5mm glass insulator, the second connector 11 is a TMA connector, and the third connector 25 and the fourth connector 26 are both SMP connectors.

[0033] Furthermore, the metal cavity 5 is made of aluminum alloy and is silver-plated.

[0034] It should be understood that although this specification describes the system according to embodiments, not every embodiment contains only one independent technical solution. This narrative style is only for clarity, and those skilled in the art should consider this specification as a whole. The technical features in each embodiment can also be reasonably combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A P-band high-power filtering and limiting component, comprising a filter (1), a limiter (2), a polarizer (3), a coupler (4), and a metal cavity (5), characterized in that: The limiter (2) is installed at the bottom of the metal cavity (5), the filter (1) and the polarizer (3) are installed at the top of the metal cavity (5), the coupler (4) is installed on the side wall of the metal cavity (5), the interconnection between the filter (1) and the polarizer (3) is achieved by welding through the wall with a metal connecting rod (19), and the polarizer (3) and the filter (1) share the same filter polarization cover plate (8). The first connector (6) and the second connector (11) are installed on the left and right sides of the metal cavity (5), and the third connector (25) and the fourth connector (26) are installed on the bottom surface of the limiter (2). The upper cover plate (9), the side cover plate (10) and the metal cavity (5) are welded by laser sealing. The entire assembly is a top and bottom layer structure.

2. The P-band high-power filter limiting component according to claim 1, characterized in that: The filter (1) is a coaxial cavity structure. The filter (1) includes five resonant rods (7). Each resonant rod is installed on one side wall of the metal cavity (5) by a fastening screw (22). At the same time, the tuning screw (21) passes through the other side wall of the metal cavity (5) and enters the resonant rod (7). There is a polytetrafluoroethylene medium (17) between the resonant rod (7) and the tuning screw (21).

3. The P-band high-power filter limiting component according to claim 1, characterized in that: The polarizer (3) is a parallel coupling structure, including an upper plane metal sheet (12) and a lower plane metal sheet (13). A dielectric sheet (27) is provided between the upper plane metal sheet (12) and the lower plane metal sheet (13). The dielectric support column (24) is fixed on the metal cavity (5) by rotating the dielectric sleeve (16). The thickness of the dielectric sheet (27) controls the gap between the upper plane metal sheet (12) and the lower plane metal sheet (13). The thickness of the inner cavity of the top polarizer (3) of the metal cavity (5) is equal to the sum of the effective parts of the combination of the upper plane metal sheet (12), the lower plane metal sheet (13), the dielectric sheet (27), the dielectric support column (24) and the dielectric sleeve (16).

4. A P-band high-power filter limiting component according to claim 2, characterized in that: A low-pass filter (20) is also provided between the filter (1) and the polarizer (3). The interconnection between the filter (1), the low-pass filter (20) and the polarizer (3) is achieved by through-wall welding with a 50-ohm metal connecting rod (19).

5. A P-band high-power filter limiting component according to claim 1, characterized in that: The coupler (4) is a 1 / 4 wavelength single-stage directional coupler. The coupler (4) includes a coupling metal sheet (14) and a coupling printed circuit board (28). The coupling method is achieved by using the upper plane metal sheet (12) in the polarizer (3) and the coupling metal sheet (14). The two ends of the coupling metal sheet (14) are welded to the coupling printed circuit board (28). One end is welded to the coupling port of the third connector (25) through the cable assembly (15), and the other end is welded to the resistor through the coupling printed circuit board (28).

6. A P-band high-power filter limiting component according to claim 1 or 2, characterized in that: The filter (1) is provided with a first metal tap (18) and a second metal tap (29). One end of the second metal tap (29) is welded to the first connector (6), and the other end is welded to the first resonant rod (7). One end of the low-pass filter (20) is welded to the last resonant rod (7) and the first metal tap (18), and the other end is welded to the upper plane metal plate (12) in the polarizer (3) through a 50-ohm metal connecting rod (19). The low-pass filter (20) is fixed on the metal cavity (5) through a polytetrafluoroethylene dielectric fixing block (23) to realize signal interconnection.

7. A P-band high-power filter limiting component according to claim 1 or 3, characterized in that: In the polarizer (3), one end of the upper flat metal plate (12) is welded to a 50-ohm metal connecting rod (19), and the other end is welded to the second connector (11). One end of the lower flat metal plate (13) is welded to the second connector (11), and the other end is welded to the input end of the limiter (2). The limiter (2) is installed on the metal cavity (5) by means of fastening screws.

8. A P-band high-power filter limiting component according to claim 1, characterized in that: The first connector (6) is a φ1.5mm glass insulator, the second connector (11) is a TMA connector, and the third connector (25) and the fourth connector (26) are both SMP connectors.

9. A P-band high-power filter limiting component according to claim 1, characterized in that: The metal cavity (5) is made of aluminum alloy and is silver-plated.

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