An airborne high-power cross-coupled cavity filter without tuning

Abstract

The present application relates to a kind of airborne debugging-free high-power cross-coupled cavity filter.It solves the technical problems such as unreasonable design of existing cavity filter.It includes filter housing with inner cavity, first connector is arranged on one side of filter housing, second connector is arranged on the other side, upper and lower ends of filter housing are respectively open, detachable upper cover plate is installed on the upper end of filter housing, detachable lower cover plate is installed on the lower end of filter housing, there are several resonant rods arranged axially in filter housing, and two non-adjacent resonant rods in several resonant rods are connected with cross-coupled crossbar arranged axially along filter housing.The advantage is that resonant rods and cross-coupled crossbar in filter housing cooperate with filtering, replace the design of a large number of tuning screws in traditional filter, improve the power capacity of filter, reduce the workload of debugging.Few manufacturing procedures and component parts, low manufacturing cost, high efficiency, ensure product consistency.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of filter devices, and particularly relates to an airborne debugging-free high-power cross-coupled cavity filter. BACKGROUND

[0002] In an airborne high-power jamming system, a cavity filter is often used to filter out out-of-band stray signals and harmonic signals. With the gradual array application of modern jamming systems, the transmission power requirement is higher and higher, and the filter used in conjunction also has the requirements of power resistance, small size, light weight and high consistency. However, the traditional cavity filter has many drawbacks in dealing with the above-mentioned occasions. Mainly reflected in: 1, the traditional cavity filter needs to be tuned by a large number of tuning screws, and these screws usually need nuts for fastening. In the application of airborne platform, the frequent vibration of the aircraft itself often causes the screw to loosen after a long time of work, resulting in the failure of the filter; 2, due to the existence of tuning screws, the traditional filter is difficult to realize overall airtightness, which often causes the filter to fire under the condition of low air pressure at high altitude in the application of airborne platform, limiting the power capacity of the filter; 3, the traditional filter can only increase the size and the distance of the coupling gap to reduce the loss of the filter and improve the power capacity of the filter, so the filter with large power capacity is bulky and heavy, which cannot meet the miniaturization and light weight requirements of the airborne platform; 4, the tuning rod, tuning screw and other components of the traditional filter need to be assembled and tuned manually, and the production process is complicated. In the batch production process, it is difficult to realize the high consistency of the filter production. SUMMARY

[0003] The purpose of the application is to solve the above problems, and provide an airborne debugging-free high-power cross-coupled cavity filter.

[0004] To achieve the above purpose, the application adopts the following technical scheme: the airborne debugging-free high-power cross-coupled cavity filter comprises a filter shell with an inner cavity, characterized in that one side of the filter shell is provided with a first connector, and the other side is provided with a second connector; the upper and lower ends of the filter shell are respectively open, and the upper end of the filter shell is detachably provided with an upper cover plate, and the lower end of the filter shell is detachably provided with a lower cover plate; a plurality of resonant rods are arranged in the filter shell in an axial direction; and two non-adjacent resonant rods among the plurality of resonant rods are connected by a cross-coupled cross rod which is arranged in an axial direction of the filter shell.

[0005] In the airborne non-adjustable high-power cross-coupled cavity filter, the filter shell is in a rectangular frame shape, the upper cover plate is installed on the upper end of the filter shell through a plurality of upper cover plate screws, and the lower cover plate is installed on the lower end of the filter shell through a plurality of lower cover plate screws, so as to close the upper and lower ends of the filter shell.

[0006] In the airborne non-adjustable high-power cross-coupled cavity filter, the first connector is installed on one side of the filter shell through a plurality of first connector screws, and the first connector is connected with the resonant rod located on the side in the filter shell; the second connector is installed on the other side of the filter shell through a plurality of second connector screws, and the second connector is connected with the resonant rod located on the other side in the filter shell.

[0007] In the airborne non-adjustable high-power cross-coupled cavity filter, the number of the resonant rods is six, and the cross-coupled horizontal rod is connected between the second resonant rod and the fifth resonant rod.

[0008] In the airborne non-adjustable high-power cross-coupled cavity filter, each resonant rod has a metal rod with different lengths and a metal hammer head, the metal hammer head is connected with the inner wall of the filter shell through the metal rod, and the metal hammer heads are sequentially and staggered arranged along the axial direction of the filter shell.

[0009] In the airborne non-adjustable high-power cross-coupled cavity filter, one end of the cross-coupled horizontal rod is connected with the end of the metal rod of the second resonant rod away from the metal hammer head through the first cross-coupled rod screw, and the other end of the cross-coupled horizontal rod is connected with the end of the metal rod of the fifth resonant rod away from the metal hammer head through the second cross-coupled rod screw.

[0010] In the airborne non-adjustable high-power cross-coupled cavity filter, the metal rod of the resonant rod extends along the width direction of the filter shell, and the metal rods of the adjacent two resonant rods are arranged in parallel, the end of the metal rod of the second resonant rod away from the metal hammer head and the end of the metal rod of the fifth resonant rod away from the metal hammer head are respectively provided with a cross-coupled rod mounting seat connected with the first cross-coupled rod screw or the second cross-coupled rod screw and extending to the upper end of the filter shell.

[0011] In the airborne non-adjustable high-power cross-coupled cavity filter, the metal hammer head is vertically arranged and both ends do not exceed the opening of the filter shell, the middle or end of the metal hammer head is connected with one end of the metal rod, at least one side of the metal rod is provided with a rod chamfer, and the outer side of the metal hammer head is provided with a hammer head chamfer.

[0012] In the above-mentioned airborne non-adjustable high-power cross-coupled cavity filter, the upper cover plate, the filter shell, the lower cover plate and the cross-coupled crossbar are all made of aluminum alloy material.

[0013] In the above-mentioned airborne non-adjustable high-power cross-coupled cavity filter, the upper cover plate, the filter shell, the lower cover plate and the cross-coupled crossbar are all made of aluminum alloy material.

[0014] Compared with the prior art, the present application has the advantages of simple structure, cooperation of the filter shell internal resonant rod and the cross-coupled crossbar for filtering, replacement of a large number of tuning screws in the traditional filter design, improvement of the filter power capacity, reduction of the adjustment workload, high-precision processing of the filter structural parts, use of aluminum alloy material to ensure electrical conductivity, low cost, rust prevention, light weight and other characteristics, fewer manufacturing processes and component parts, low manufacturing cost, high efficiency and product consistency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the structural explosion diagram of the present application.

[0016] Figure 2 is the side view of the filter shell in the present application.

[0017] Figure 3 is Figure 2 is the structural sectional view under the A-A perspective in the present application.

[0018] In the figure: filter shell 1, upper cover plate 11, upper cover plate screw 111, lower cover plate 12, lower cover plate screw 121, first connector 2, first connector screw 21, second connector 3, second connector screw 31, resonant rod 4, metal rod 41, rod chamfer 411, metal hammer head 42, hammer head chamfer 421, cross-coupled crossbar 5, first cross-coupled rod screw 51, second cross-coupled rod screw 52, cross-coupled rod mounting seat 53. DETAILED DESCRIPTION

[0019] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0020] As Figures 1-3The machine-mounted debugging-free high-power cross-coupled cavity filter includes a filter housing 1 with an inner cavity, a first connector 2 on one side of the filter housing 1, and a second connector 3 on the other side of the filter housing 1. The upper and lower ends of the filter housing 1 are open, and the upper end of the filter housing 1 is detachably mounted with an upper cover plate 11, and the lower end of the filter housing 1 is detachably mounted with a lower cover plate 12. The filter housing 1 has a plurality of resonant rods 4 arranged axially in sequence, and two non-adjacent resonant rods 4 are connected by a cross-coupled cross rod 5 arranged axially and obliquely in the filter housing 1. The signal is input from the first connector 2, filtered by the resonant rods 4 and the cross-coupled cross rod 5 inside the filter housing, and output from the second connector 3. Instead of the traditional design of a large number of tuning screws in the cavity filter, this design achieves high performance, miniaturization, and light weight, greatly reduces production costs, and improves product quality and production efficiency.

[0021] Preferably, the filter housing 1 in the embodiment is in the shape of a rectangular frame, the upper cover plate 11 is mounted on the upper end of the filter housing 1 by a plurality of upper cover plate screws 111, and the lower cover plate 12 is mounted on the lower end of the filter housing 1 by a plurality of lower cover plate screws 121, thereby closing the upper and lower ends of the filter housing 1. The upper cover plate 11 and the lower cover plate 12 can ensure the overall airtightness of the filter housing 1.

[0022] The upper cover plate 11, the filter housing 1, the lower cover plate 12, and the cross-coupled cross rod 5 are all made of rust-resistant aluminum alloy and are processed with high precision to ensure structural precision, product consistency, conductivity, low cost, rust resistance, and light weight.

[0023] Preferably, the first connector 2 is mounted on one side of the filter housing 1 by a plurality of first connector screws 21 and is connected to the resonant rods 4 located on the side of the filter housing 1, and the second connector 3 is mounted on the other side of the filter housing 1 by a plurality of second connector screws 31 and is connected to the resonant rods 4 located on the other side of the filter housing 1. The number of resonant rods 4 is six, and the cross-coupled cross rod 5 is connected between the second resonant rod 4 and the fifth resonant rod 4.

[0024] Each resonant rod 4 has a metal rod 41 and a metal hammer head 42, the metal hammer head 42 is connected to the inner wall of the filter housing 1 through the metal rod 41, and the metal hammer head 42 is arranged axially and sequentially staggered in the filter housing 1. To filter different frequency signals, the shape and position of the metal hammer head 42, the metal rod 41, and the cross-coupled cross rod 5 of the filter housing 1 can be adjusted.

[0025] Preferably, one end of the cross-coupling cross-bar 5 is connected to the end of the metal rod 41 of the second resonant rod 4 away from the metal hammer head 42 by the first cross-coupling rod screw 51, and the other end of the cross-coupling cross-bar 5 is connected to the end of the metal rod 41 of the fifth resonant rod 4 away from the metal hammer head 42 by the second cross-coupling rod screw 52.

[0026] Preferably, the metal rod 41 of the resonant rod 4 extends along the width direction of the filter housing 1 and the metal rods 41 of two adjacent resonant rods 4 are arranged in parallel to each other, and the end of the metal rod 41 of the second resonant rod 4 away from the metal hammer head 42 and the end of the metal rod 41 of the fifth resonant rod 4 away from the metal hammer head 42 are respectively connected to the cross-coupling rod mounting seat 53 extending to the upper end of the filter housing 1 by the first cross-coupling rod screw 51 or the second cross-coupling rod screw 52.

[0027] Preferably, the metal hammer head 42 is vertically arranged and both ends thereof do not exceed the opening of the filter housing 1, the middle or end of the metal hammer head 42 is connected to the end of the metal rod 41, and at least one side of the metal rod 41 has a rod chamfer 411, and the circumferential outer side of the metal hammer head 42 has a hammer head chamfer 421, and the metal hammer head 42 and the metal rod 41 can be integrally formed or fixedly connected.

[0028] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

[0029] Although the terms such as filter housing 1, upper cover plate 11, upper cover plate screw 111, lower cover plate 12, lower cover plate screw 121, first connector 2, first connector screw 21, second connector 3, second connector screw 31, resonant rod 4, metal rod 41, rod chamfer 411, metal hammer head 42, hammer head chamfer 421, cross-coupling cross-bar 5, first cross-coupling rod screw 51, second cross-coupling rod screw 52, cross-coupling rod mounting seat 53, etc. are used more frequently herein, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the present application; any interpretation of them as any kind of additional limitation is contrary to the spirit of the present application.

Claims

1. An airborne debugging-free high-power cross-coupled cavity filter, comprising a filter housing (1) having an inner cavity, characterized in that: The filter housing (1) is provided with a first connector (2) on one side and a second connector (3) on the other side. The filter housing (1) is open at both ends, and an upper cover plate (11) is detachably mounted on the upper end of the filter housing (1), and a lower cover plate (12) is detachably mounted on the lower end of the filter housing (1). A plurality of resonant rods (4) are arranged in axial order in the filter housing (1), and two non-adjacent resonant rods (4) among the plurality of resonant rods (4) are detachably connected with a cross-coupling cross bar (5) arranged obliquely along the axial direction of the filter housing (1). The number of the resonant rods (4) is 6, and the cross-coupling cross bar (5) is connected between the second resonant rod (4) and the fifth resonant rod (4). Each resonant rod (4) has a metal rod (41) of different lengths and a metal hammer head (42). The metal hammer head (42) is connected to the inner wall of the filter housing (1) through the metal rod (41), and the metal hammer head (42) is arranged along the axial direction of the filter housing (1). The filter housing (1) is axially staggered in sequence; one end of the cross-coupling cross bar (5) is connected to the end of the metal rod (41) of the second resonant rod (4) away from the metal hammer (42) through a first cross-coupling rod screw (51), and the other end of the cross-coupling cross bar (5) is connected to the end of the metal rod (41) of the fifth resonant rod (4) away from the metal hammer (42) through a second cross-coupling rod screw (52); the metal rods (41) of the resonant rods (4) are extended along the width direction of the filter housing (1), and the metal rods (41) of two adjacent resonant rods (4) are arranged parallel to each other, and the end of the metal rod (41) of the second resonant rod (4) away from the metal hammer (42) and the end of the metal rod (41) of the fifth resonant rod (4) away from the metal hammer (42) respectively have a cross-coupling rod mounting seat (53) connected to the first cross-coupling rod screw (51) or the second cross-coupling rod screw (52) and extending toward the upper end of the filter housing (1).

2. The airborne debugging-free high-power cross-coupled cavity filter according to claim 1, characterized in that: The filter housing (1) is in the shape of a rectangular frame, the upper cover plate (11) is mounted on the upper end of the filter housing (1) by means of a plurality of upper cover plate screws (111), and the lower cover plate (12) is mounted on the lower end of the filter housing (1) by means of a plurality of lower cover plate screws (121), thereby sealing the upper and lower ends of the filter housing (1).

3. The airborne debugging-free high-power cross-coupled cavity filter according to claim 2, characterized in that: The first connector (2) is mounted on one side of the filter housing (1) via a plurality of first connector screws (21), and the first connector (2) is connected to a resonance rod (4) located on the side of the filter housing (1); the second connector (3) is mounted on the other side of the filter housing (1) via a plurality of second connector screws (31), and the second connector (3) is connected to a resonance rod (4) located on the other side of the filter housing (1).

4. The airborne debugging-free high-power cross-coupled cavity filter according to claim 1, characterized in that: The metal hammer head (42) is vertically arranged and both ends do not extend beyond the opening of the filter housing (1); the middle or end of the metal hammer head (42) is connected to one end of the metal rod (41), and at least one side of the metal rod (41) has a rod chamfer (411); and the circumferential outer side of the metal hammer head (42) has a hammer head chamfer (421).

5. The airborne debugging-free high-power cross-coupled cavity filter according to claim 1, characterized in that: The upper cover plate (11), the filter housing (1), the lower cover plate (12) and the cross-coupling crossbar (5) are all made of aluminum alloy material.

6. The airborne debugging-free high-power cross-coupled cavity filter according to claim 1, characterized in that: The surfaces of the upper cover plate (11), the filter housing (1), the lower cover plate (12) and the cross-coupling crossbar (5) all have a silver-plated layer.

Images