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Cavity filter and manufacture method thereof

A cavity filter and manufacturing method technology, applied in the directions of waveguide type devices, electrical components, circuits, etc., can solve the problems of poor contact of the resonant rod, high cost, complicated process, etc., achieve convenient radio frequency index, reduce production cost, guarantee The effect of RF indicators

Active Publication Date: 2014-12-24
ANHUI TATFOOK TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] During the research and practice of the prior art, the inventors of the present invention found that, in the prior art, the resonant rod is assembled on the cavity, and the resonant rod needs to be manually locked on the cavity with screws, the process is complicated and the cost Relatively high, and there may be poor contact between the resonant rod and the cavity

Method used

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  • Cavity filter and manufacture method thereof
  • Cavity filter and manufacture method thereof
  • Cavity filter and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1. A cavity filter, as shown in the schematic sectional view 2(a), includes a cover plate 201 and a resonant rod 202. One side of the cover plate 201 is provided with a concave platform 203, and the resonant rod 202 is riveted in the concave platform 203 .

[0024] The resonant rod in this embodiment may be a stretched resonant rod stamped from a thin metal plate. This kind of resonant rod can reduce the material cost of the resonant rod and is easy to assemble later. Of course, the resonant rod of the present invention can also be machined from bar stock or processed by other processing methods. The shape of the resonant rod in this embodiment may also be a cuboid, a hexahedron, etc., which do not limit the present invention. The resonant rod can be a resonant rod with a flange 204, which is beneficial for later riveting. The shape of the flange can be square, pentagonal, etc., or it can be a resonant rod without a flange. within the protection scope of th...

Embodiment 2

[0029] Embodiment 2. A cavity filter, including a cover plate and a resonant rod, one side of the cover plate is provided with a raised portion, the bottom surface of the resonant rod is provided with a recessed portion, the recessed portion and the raised portion The resonance rod is fixed on the cover plate by way of interference fit.

[0030] The resonant rod in the second embodiment may also be a resonant rod with wire teeth. Specifically, the resonant rod is provided with a storage space for accommodating the protrusion on the cover plate, and when forming the resonant rod A plurality of wire teeth are arranged on the inner side wall of the resonant rod in the accommodation space, so that an interference fit is formed between the resonant rod and the protrusion, and then the resonant rod is fixed on the cover plate.

[0031] The resonant rod does not need to be matched with the cavity through additional screws, but directly interferes with the cover plate, which not only ...

Embodiment 3

[0033] Embodiment 3, a cavity filter, including a cover plate and a resonant rod, one side of the cover plate is provided with a recessed part, the bottom surface of the resonant rod is provided with a raised part, the recessed part and the raised part The resonance rod is fixed on the cover plate by way of interference fit.

[0034] The resonant rod in Embodiment 3 may also be a resonant rod with wire teeth. Specifically, the cover plate is provided with a storage space for accommodating the protrusion on the bottom surface of the resonant rod, and the The outer wall of the resonant rod forming the accommodation space is provided with a plurality of wire teeth, so that an interference fit is formed between the convex part of the resonant rod and the concave part of the cover plate, and then the resonant rod is fixed on the cover board.

[0035] The resonant rod does not need to be matched with the cavity through additional screws, but directly interferes with the cover plate...

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PUM

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Abstract

The invention discloses a cavity filter and a manufacture method thereof, and in particular relates to a cavity filter of which a cover plate is connected with a resonance rod. The cavity filter provided by the embodiment of the invention comprises the resonance rod and the cover plate, wherein the resonance rod and the cover plate are connected together in a riveted way, one face of the cover plate is provided with a concave table, and the resonance rod is riveted in the concave table. The resonance rod and the cover plate of the cavity filter provided by the embodiment of the invention can also be connected together in an interference fit mode. Compared with a mode that the resonance rod is arranged in a cavity in the prior art, the invention has the structure that the resonance rod and the cover plate are connected, therefore, the working procedure of locking screws manually is omitted, the cost on the filter is reduced, and a radio frequency index is easy to guarantee.

Description

technical field [0001] The invention relates to a cavity filter, in particular to a cavity filter in which a cover plate is connected with a resonant rod and a manufacturing method thereof. Background technique [0002] As a frequency selective device, cavity filters are widely used in the field of communication, especially in the field of radio frequency communication. In the base station, the filter is used to select the communication signal and filter out the clutter or interference signal outside the frequency of the communication signal. [0003] Cavity filters generally include three types, the first type is coaxial cavity filter, the second type is dielectric filter, and the third type is waveguide filter. A coaxial cavity filter generally includes: a cavity, a cover plate and a metal resonant rod accommodated in the cavity. [0004] A schematic cross-sectional view of a cavity filter in the prior art is shown as figure 1 As shown, the resonant rod 101 is usually m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/207H01P11/00
Inventor 孙尚传童恩东
Owner ANHUI TATFOOK TECH CO LTD