Passive multifunctional filtering polarization coupling assembly

Abstract

The invention discloses a passive multifunctional filtering polarization coupling assembly, which belongs to the technical field of microwaves and comprises a filter, a polarizer, a coupler and a metal cavity. The metal cavity is divided into an upper cavity and a lower cavity, a partition plate is arranged between the upper cavity and the lower cavity, the filter is arranged in the lower cavity, and the polarizer and the coupler are arranged in the upper cavity; the filter and the polarizer are connected with each other through a connecting rod, and the polarizer and the coupler are in coupling connection through an upper plane metal plate and a coupling metal rod. According to the invention, the transmission loss between devices is reduced, the size of the filtering polarization coupling assembly is greatly reduced under the condition that the transmitting power is met, and the purposes of multiple functions, high integration and miniaturization are achieved.

Description

Technical Field

[0003] The invention belongs to the field of microwave technology, and in particular relates to a passive multifunctional filtering polarization coupling component. Background Art

[0005] As the functional requirements of radar systems become higher, especially the technical requirements for multi-function and high integration of phased array radar systems, the corresponding radar array volume becomes larger and larger, and corresponding requirements for integration and modularization are put forward for various components and subsystems of the system. The existing single cascade of filters, polarizers and couplers will result in a long link, increase transmission loss, occupy a large component area, have high design and production costs, and are not conducive to installation, use and maintenance. Therefore, how to develop the filtering polarization coupling components in the direction of miniaturization is an urgent problem to be solved in this field. Summary of the invention

[0007] In view of the above technical problems, the purpose of the present invention is to propose a passive multifunctional filtering polarization coupling component. The component takes the cavity filter as the core, and other functional devices are extended to the three-dimensional space through the two-dimensional plane structure, which reduces the plane size occupied by the component, facilitates installation and assembly, and better realizes multi-function, low cost, high integration and miniaturization.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0009] A passive multifunctional filtering polarization coupling component, characterized in that it includes a filter, a polarizer, a coupler and a metal cavity; the metal cavity is divided into an upper cavity and a lower cavity, with a partition plate in the middle, the filter is arranged in the lower cavity, and the polarizer and the coupler are arranged in the upper cavity; the filter and the polarizer are interconnected by a connecting rod, and the polarizer and the coupler are coupled and connected by an upper plane metal plate and a coupling metal rod.

[0010] As a preferred structure of the present invention, the filter is a coaxial cavity structure, the filter includes multiple resonant rods, each resonant rod is fixed to the side wall of one end of the metal cavity by a fastening screw, and the tuning screw passes through the side wall of the other end of the metal cavity into the resonant rod, and there is an air gap between the resonant rod and the tuning screw.

[0011] As a preferred structure of the present invention, the filter also includes a first metal tap and a second metal tap, one end of the first metal tap is welded to the input-output connector, and the other end is welded to the first resonant rod, while one end of the connecting rod passes through the partition and is welded to the second metal tap on the last resonant rod, and the other end is welded to the upper plane metal rod in the polarizer to achieve signal interconnection.

[0012] As a preferred structure of the present invention, the polarizer is a parallel coupling structure, and the polarizer includes an upper plane metal plate and a lower plane metal plate. A dielectric sheet is provided between the upper plane metal plate and the lower plane metal plate, and is fixed to the partition by screwing the dielectric support column through the dielectric sleeve. The thickness of the dielectric sheet controls the gap between the upper plane metal plate and the lower plane metal plate.

[0013] As a preferred structure of the present invention, the coupler is a 1 / 4 wavelength single-stage directional coupler, the coupler includes a coupling metal rod and a low-power load, one end of the coupling metal rod is welded to the low-power load, and the other end is welded to the input-output connector coupling port, and the welding of the low-power load is sintered on the coupler by reflow soldering.

[0014] As a preferred structure of the present invention, fastening screws and tuning screws are provided on the front and rear sides of the metal cavity, and covers are provided on the outside of the fastening screws and tuning screws to achieve sealing; input and output connectors are installed on the left and right sides of the metal cavity, three are provided on the side close to the coupler, and one is provided on the other side; the top of the metal cavity is sealed by a polarization coupling cover plate, and the bottom is sealed by a filter cover plate.

[0015] As a preferred structure of the present invention, the polarizer also includes a high-power resistor, one end of the upper planar metal plate is welded to the connecting rod, and the other end is welded to the input-output connector, one end of the lower planar metal plate is welded to the input-output connector, and the other end is welded to the high-power resistor, and the high-power resistor is mounted on the partition by screws.

[0016] As a preferred structure of the present invention, the input and output connectors are φ0.9mm glass insulators.

[0017] As a preferred structure of the present invention, the metal cavity is made of aluminum alloy and is silver-plated.

[0018] As a preferred structure of the present invention, the connecting rod is a 50-ohm metal connecting rod.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention provides a passive multifunctional filtering polarization coupling component. The signal is filtered through the input port of the filtering polarization coupling component. The output end of the filter is connected to the input end of a polarizer, and the signal is divided into two to the output end of the filtering polarization coupling component to achieve orthogonal 90° polarization. The signal is transmitted through an antenna, and at the same time, the coupler monitors the signal through one end of the polarizer output.

[0021] The present invention can reduce transmission losses between devices, greatly reduce the size of the filtering polarization coupling component while meeting the transmission power, and achieve the purposes of multi-function, high integration, and miniaturization. At the same time, it is easy to install and assemble, the structural layout is simple and compact, the performance is stable and reliable, and it is easy to repair and maintain, and the cost is effectively reduced. The filtering polarization coupling component can be applied to military electronic communication equipment, such as phased array radars and electronic countermeasures, and can also be used in civilian meteorological radars. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The circuit diagram of a passive multifunctional filtering polarization coupling component.

[0024] Figure 2 The schematic diagram is a structural diagram of a passive multifunctional filtering polarization coupling component.

[0025] Figure 3 The filter plane diagram is a passive multifunctional filtering polarization coupling component.

[0026] Figure 4 A schematic diagram of a polarizer and coupler of a passive multifunctional filtering polarization coupling component.

[0027] Figure 5 A schematic cross-sectional view of a filter that is a passive multifunctional filtering polarization coupling component.

[0028] Figure 6 A schematic cross-sectional view of a polarizer of a passive multifunctional filtering polarization coupling component.

[0029] Figure 7 A schematic diagram of the cavity structure of a passive multifunctional filtering polarization coupling component.

[0030] In the figure, 1 is a filter, 2 is a polarizer, 3 is a coupler, 4 is a metal cavity, 5 is a polarization coupling cover, 6 is a filter cover, 7 is an upper plane metal plate, 8 is a lower plane metal plate, 9 is a dielectric sleeve, 10 is a dielectric support column, 11 is an input and output connector, 12 is a sealing ring, 13 is a fastening screw, 14 is a low-power load, 15 is a connecting rod, 16 is a coupling metal rod, 17 is a tuning screw, 18 is a resonant rod, 19 is a first metal tap plate, 20 is a second metal tap plate, 21 is a dielectric plate, 22 is a high-power resistor, 23 is a screw, 41 is an upper cavity, 43 is a lower cavity, and 43 is a partition. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is further explained below in conjunction with the accompanying drawings and specific embodiments.

[0033] This embodiment discloses a passive multifunctional filtering polarization coupling component, see Figures 1 to 7 As shown, it includes a filter 1, a polarizer 2, a coupler 3 and a metal cavity 4; the metal cavity 4 is divided into an upper cavity 41 and a lower cavity 42, with a partition 43 in the middle, the filter 1 is arranged in the lower cavity 42, and the polarizer 2 and the coupler 3 are arranged in the upper cavity 41; the filter 1 and the polarizer 2 are interconnected by a connecting rod 15, and the polarizer 2 and the coupler 3 are coupled and connected by an upper plane metal plate 7 and a coupling metal rod 16.

[0034] like Figure 3 As shown, the filter 1 is a coaxial cavity structure, and the filter 1 includes a plurality of resonant rods 18. Each resonant rod is fixed to the side wall of one end of the metal cavity 4 by a fastening screw 13. At the same time, the tuning screw 17 passes through the side wall of the other end of the metal cavity 4 and enters the resonant rod 18. There is an air gap between the resonant rod 18 and the tuning screw 17.

[0035] The filter 1 also includes a first metal tap 19 and a second metal tap 20. One end of the first metal tap 19 is welded to the input-output connector 11, and the other end is welded to the first resonant rod 18. At the same time, one end of the connecting rod 15 passes through the partition 43 and is welded to the second metal tap 20 on the last resonant rod, and the other end is welded to the upper plane metal rod 7 in the polarizer 2 to achieve signal interconnection.

[0036] like Figure 4 As shown, the polarizer 2 is a parallel coupling structure, and the polarizer 2 includes an upper plane metal plate 7 and a lower plane metal plate 8. A dielectric sheet 21 is provided between the upper plane metal plate 7 and the lower plane metal plate 8, and is fixed on the partition 43 by screwing the dielectric support column 10 through the dielectric sleeve 9. The thickness of the dielectric sheet 21 controls the gap between the upper plane metal plate 7 and the lower plane metal plate 8.

[0037] The polarizer 2 also includes a high-power resistor 22. One end of the upper planar metal plate 7 is welded to the connecting rod 15, and the other end is welded to the input-output connector 11. One end of the lower planar metal plate 8 is welded to the input-output connector 11, and the other end is welded to the high-power resistor 22. The high-power resistor 22 is mounted on the partition 43 by screws 23.

[0038] The coupler 3 is a 1 / 4 wavelength single-stage directional coupler. The coupler 3 includes a coupling metal rod 16 and a low-power load 14. One end of the coupling metal rod 16 is welded to the low-power load 14, and the other end is welded to the coupling port of the input-output connector 11. The welding of the low-power load 14 is sintered on the coupler 3 by reflow soldering.

[0039] like Figure 2As shown, fastening screws 13 and tuning screws 17 are provided on the front and rear sides of the metal cavity 4, and covers are provided on the outside of the fastening screws 13 and the tuning screws 17 to achieve sealing; input and output connectors 11 are installed on the left and right sides of the metal cavity 4, three are provided on the side close to the coupler 3, and one is provided on the other side; the top of the metal cavity 4 is sealed by a polarization coupling cover plate 5, and the bottom is sealed by a filter cover plate 6.

[0040] Preferably, the input and output connector 11 is a φ0.9 mm glass insulator.

[0041] Preferably, the metal cavity 4 is made of aluminum alloy and is silver-plated.

[0042] Preferably, the connecting rod 15 is a 50 ohm metal connecting rod.

[0043] The above description is only a preferred embodiment of the present invention and does not constitute a limitation on the protection scope of the present invention. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A passive multifunctional filtering polarization coupling component, characterized in that: The invention comprises a filter (1), a polarizer (2), a coupler (3) and a metal cavity (4); the metal cavity (4) is divided into an upper cavity (41) and a lower cavity (42), with a partition (43) provided in the middle; the filter (1) is arranged in the lower cavity (42), and the polarizer (2) and the coupler (3) are arranged in the upper cavity (41); the filter (1) and the polarizer (2) are interconnected via a connecting rod (15), and the polarizer (2) and the coupler (3) are coupled to each other via an upper plane metal plate (7) and a coupling metal rod (16).

2. A passive multifunctional filtering polarization coupling component according to claim 1, characterized in that: The filter (1) is a coaxial cavity structure, comprising a plurality of resonant rods (18), each of which is fixed to a side wall at one end of a metal cavity (4) by a fastening screw (13), while a tuning screw (17) passes through the side wall at the other end of the metal cavity (4) and enters the resonant rod (18), and an air gap exists between the resonant rod (18) and the tuning screw (17).

3. A passive multifunctional filtering polarization coupling component according to claim 1 or 2, characterized in that: The filter (1) further comprises a first metal tap plate (19) and a second metal tap plate (20); one end of the first metal tap plate (19) is welded to the input / output connector (11), and the other end is welded to the first resonant rod (18); at the same time, one end of the connecting rod (15) passes through the partition (43) and is welded to the second metal tap plate (20) on the last resonant rod, and the other end is welded to the upper plane metal rod (7) in the polarizer (2), thereby realizing signal interconnection.

4. A passive multifunctional filtering polarization coupling component according to claim 1, characterized in that: The polarizer (2) is a parallel coupling structure, comprising an upper plane metal plate (7) and a lower plane metal plate (8), a dielectric sheet (21) is provided between the upper plane metal plate (7) and the lower plane metal plate (8), and is fixed to the partition plate (43) by screwing a dielectric support column (10) through a dielectric sleeve (9), and the thickness of the dielectric sheet (21) controls the gap between the upper plane metal plate (7) and the lower plane metal plate (8).

5. The passive multifunctional filtering polarization coupling component according to claim 1, characterized in that: The coupler (3) is a 1 / 4 wavelength single-stage directional coupler. The coupler (3) comprises a coupling metal rod (16) and a low-power load (14). One end of the coupling metal rod (16) is welded to the low-power load (14), and the other end is welded to a coupling port of an input / output connector (11). The low-power load (14) is welded to the coupler (3) by reflow soldering.

6. The passive multifunctional filtering polarization coupling component according to claim 1, characterized in that: The metal cavity (4) is provided with fastening screws (13) and tuning screws (17) on both the front and rear sides, and covers are provided on the outside of the fastening screws (13) and the tuning screws (17) to achieve sealing; input and output connectors (11) are installed on the left and right sides of the metal cavity (4), with three connectors being provided on the side close to the coupler (3) and one connector being provided on the other side; the top of the metal cavity (4) is sealed by a polarization coupling cover (5), and the bottom is sealed by a filter cover (6).

7. A passive multifunctional filtering polarization coupling component according to claim 4, characterized in that: The polarizer (2) further comprises a high-power resistor (22); one end of the upper flat metal plate (7) is welded to the connecting rod (15), and the other end is welded to the input / output connector (11); one end of the lower flat metal plate (8) is welded to the input / output connector (11), and the other end is welded to the high-power resistor (22); the high-power resistor (22) is mounted on the partition (43) by means of screws (23).

8. The passive multifunctional filtering polarization coupling component according to claim 1, characterized in that: The input and output connector (11) is a φ0.9 mm glass insulator.

9. The passive multifunctional filtering polarization coupling component according to claim 1, characterized in that: The metal cavity (4) is made of aluminum alloy and is silver-plated.

10. The passive multifunctional filtering polarization coupling component according to claim 7, characterized in that: The connecting rod (15) is a 50-ohm metal connecting rod.

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