Novel filter lightning protection structure

Abstract

The utility model relates to the technical field of filters, in particular to a novel lightning protection structure of a filter, which comprises a filter cavity, a joint connector, a wave trap, a printed circuit board (PCB), a lightning protection discharge tube and two groups of inductance coils. The PCB is fixed to the top of the filter cavity through screws and used for being connected with a resonant column arranged in the filter cavity, the wave trap is arranged on the inner side wall of the filter cavity, two sets of inductance coils are welded to the two ends of the wave trap respectively, the ends of one set of inductance coils are connected with the PCB, and the ends of the other set of inductance coils are connected with the resonant column. The end part of the other group of inductance coils is connected with a capacitor on the joint connector; and the lightning protection discharge tube is welded on the PCB. According to the utility model, the product index performance can be greatly improved, the product failure rate is reduced, and the product manufacturing cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter technical field, concretely relates to a novel filter lightning protection structure. BACKGROUND

[0002] The filter is an indispensable product in the communication equipment, and the high performance index of the lightning protection filter product is not easy to realize, and the processing cost is too high to meet the mass production demand. A good filter can greatly reduce the product manufacturing cost in the equipment, and the lightning protection filter realized by the structure can greatly improve the product index performance, reduce the product failure rate and reduce the product manufacturing cost. UTILITY MODEL CONTENT

[0003] In order to solve the problems in the background art, the utility model provides a novel filter lightning protection structure, which can greatly improve the product index performance, reduce the product failure rate and reduce the product manufacturing cost.

[0004] In order to solve the above problems, the utility model adopts the following technical scheme: a novel filter lightning protection structure, including filter cavity, joint connector, wave trap, PCB board, lightning protection discharge pipe and two groups of inductance coils, the joint connector is fixedly connected at the front end of the filter cavity through the screw, the PCB board is fixed on the top of the filter cavity through the screw and is used for connecting the resonant column arranged in the filter cavity, the wave trap is arranged on the inner side wall of the filter cavity, and the two ends are respectively welded with two groups of inductance coils, one end of one group of inductance coils is connected with the PCB board, the other end of the other group of inductance coils is connected with the capacitor on the joint connector, and the lightning protection discharge pipe is welded on the PCB board.

[0005] Further, the outer end of the joint connector is provided with external threads in the filter cavity.

[0006] Further, it further includes the cover plate arranged on the filter cavity, and the PCB board is fastened and connected on the cover plate and grounded through the screw.

[0007] Further, the welding depth of the end of the wave trap is adjustable.

[0008] Further, the material of the filter cavity is aluminum alloy.

[0009] Further, the material of the joint connector is beryllium bronze.

[0010] Further, the material of the lightning protection discharge pipe is ceramic.

[0011] Further, the material of the wave trap is brass.

[0012] Furthermore, the inductor coil is made of enameled wire.

[0013] Furthermore, the PCB board is made of epoxy resin.

[0014] The beneficial effects of this utility model are as follows: This utility model uses a PCB board, inductor coil, capacitor, and surge protector tube to solve the problems of high difficulty in surge protection and complex assembly of traditional filters. It eliminates the need for traditional large surge protector PCB boards. This solution performs impedance transformation at the connection points of the inductor coil, capacitor, and surge protector tube, which can greatly improve the output matching problem. The notch filter is fixed inside the filter cavity, and both ends are soldered with high-power inductor coils. The output impedance is changed by changing the depth of the solder joint inside the filter cavity to achieve a batch performance exceeding the required specifications. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 for Figure 1 A magnified view of a portion of point I.

[0018] 1. Filter cavity; 2. Connector; 3. Notch filter; 4. PCB board; 5. Lightning discharge tube; 6. Inductor coil; 7. Resonant column. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] This utility model uses a PCB board 4, an inductor coil 6, a capacitor, and a surge protection discharge tube 5 to solve the problems of high difficulty in surge protection and complex assembly of traditional filters. It eliminates the need for the traditional large surge protection PCB board 4. This solution performs impedance transformation at the connection of the inductor coil 6, the capacitor, and the surge protection discharge tube 5, which can greatly improve the output matching problem. The notch filter 3 is fixed inside the filter cavity 1, and its two ends are soldered with high-power inductor coils 6. The output impedance is changed by changing the depth of the joint soldering part inside the filter cavity 1 to achieve a batch performance higher than required.

[0021] Specifically, such as Figure 1 andFigure 2 The utility model discloses a new filter lightning protection structure, including filter cavity 1, joint connector 2, wave trap 3, PCB board 4, lightning protection discharge pipe 5 and two groups of inductance coil 6, joint connector 2 is fixedly connected through screw in the front end of filter cavity 1, PCB board 4 is fixed in the top of filter cavity 1 and is used for connecting the resonant column 7 arranged in filter cavity 1, wave trap 3 is arranged on the inner side wall of filter cavity 1, and both ends are welded two groups of inductance coil 6 respectively, one group of inductance coil 6 is connected with PCB board 4, and the end of another group of inductance coil 6 is connected with the capacitance on joint connector 2, and lightning protection discharge pipe 5 is welded on PCB board 4.

[0022] Further, the outer end of the joint connector 2 is provided with external threads.

[0023] Further, the utility model also includes a cover plate arranged on the filter cavity 1, and the PCB board 4 is fastened and connected to the cover plate by screws and grounded.

[0024] Further, the welding depth of the end of the wave trap 3 is adjustable.

[0025] Further, the filter cavity 1 is made of aluminum alloy.

[0026] Further, the joint connector 2 is made of beryllium bronze.

[0027] Further, the lightning protection discharge pipe 5 is made of ceramic.

[0028] Further, the wave trap 3 is made of brass.

[0029] Further, the inductance coil 6 is made of enameled wire.

[0030] Further, the PCB board 4 is made of epoxy resin.

[0031] The utility model uses the PCB board 4, inductance coil 6, capacitor and lightning protection discharge pipe 5, can solve the problem, such as big difficulty of traditional filter lightning protection, assembly complex, cancels traditional large lightning protection PCB board 4, the scheme carries out impedance transformation at inductance coil 6, capacitor and lightning protection discharge pipe 5 connection, can greatly improve output matching problem, fixes wave trap 3 in the inside of filter cavity 1, and both ends are welded through high-power inductance coil 6, and the joint welding part changes the depth in filter cavity 1, changes output impedance, to reach the batch index requirement higher than demand.

[0032] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A new filter lightning protection structure, characterized by: The utility model relates to a lightning protection filter, which comprises a filter cavity (1), a joint connector (2), a wave trap (3), a PCB board (4), a lightning protection discharge tube (5) and two groups of inductor coils (6), the joint connector (2) is fixedly connected to the front end of the filter cavity (1) through a screw, the PCB board (4) is fixed to the top of the filter cavity (1) through a screw and is used for connecting a resonant column (7) arranged in the filter cavity (1), the wave trap (3) is arranged on the inner side wall of the filter cavity (1) and is welded with two groups of inductor coils (6) at two ends, one end of one group of inductor coils (6) is connected to the PCB board (4), and the other end of the other group of inductor coils (6) is connected to a capacitor on the joint connector (2), and the lightning protection discharge tube (5) is welded on the PCB board (4).

2. The lightning protection structure of a new filter according to claim 1, characterized in that: The outer end of the joint connector (2) is provided with an external thread.

3. The lightning protection structure of the novel filter according to claim 1, characterized in that: The utility model further comprises a cover plate arranged on the filter cavity (1), the PCB board (4) is fastened and connected to the cover plate through a screw and is grounded.

4. The lightning protection structure of the novel filter according to claim 1, characterized in that: The welding depth of the end of the wave trap (3) is adjustable.

5. The lightning protection structure of a new filter according to claim 1, characterized in that: The material of the filter cavity (1) is aluminum alloy.

6. The lightning protection structure of a new filter according to claim 1, characterized in that: The material of the joint connector (2) is beryllium bronze.

7. The lightning protection structure of a new filter according to claim 1, characterized in that: The material of the lightning protection discharge tube (5) is ceramic.

8. The lightning protection structure of the novel filter according to claim 1, characterized in that: The material of the wave trap (3) is brass.

9. The lightning protection structure of a new filter according to claim 1, characterized in that: The material of the inductor coil (6) is enameled wire.

10. The lightning protection structure of a new filter according to claim 1, characterized in that: The material of the PCB board (4) is epoxy resin.

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