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A cavity filter

A cavity filter and filter technology, applied in the field of signal processing, can solve problems such as high defective rate of threaded holes, looseness, labor costs, etc., and achieve the effect of saving material costs, saving processing costs, and easy processing

Active Publication Date: 2018-10-12
JOHNSON PRECISION ENG SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current common filters include cavity, cover plate and tuning self-locking screws and other components. Most of the filter cover plates are now processed by stamping holes on the plate to process the tuning holes. On the one hand, the threaded holes are processed by stamping. The defective rate is high and the manufacturing cost is too high. On the other hand, the punched tuning hole needs to be additionally installed with a tuning screw sleeve. The tuning screw sleeve is fixed on the tuning hole by welding, riveting, gluing, etc. The tuning screw sleeve The installation not only requires labor costs and processing costs, but at the same time, the additional tuning screw sleeve installed on the tuning hole is not stable, and it is easy to loosen after a period of time, and the interface between the tuning hole and the tuning screw sleeve is not stable. Flat, which ultimately affects the actual tuning effect

Method used

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Embodiment Construction

[0023] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are only used to explain the present invention, but should not be understood as limiting the present invention.

[0024] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, they can be mechanically connected or electrically connected, or two The internal communication of the components can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms can be unde...

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PUM

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Abstract

The invention discloses a cavity filter, which comprises a cavity, a cover board and a tuning self-locking bolt, wherein the cover board is used for closing the cavity of the cavity filter; the cover board comprises a cover board body; the cover board body is made of a copper aluminum alloy; a tuning threaded hole is formed in the cover board body and specifically is a lug boss which extends towards the direction of the cavity and is molded integrally with the cover board body; the tuning self-locking bolt is divided into a head part and a rod part and is fabricated by copper; the head part is arranged at one end of the bolt; the rod part is arranged at the other end of the bolt; two sets of threads are arranged on the head part of the bolt to form screws; the upper and lower two sets of threads are the same in diameter L and screw pitch P; and the diameter of the part between the two threads is 40%-70% that of the rod part. The cavity filter disclosed by the invention has the advantages of cost and tuning performance.

Description

Technical field [0001] The invention relates to the field of signal processing, in particular to a cavity filter. Background technique [0002] At present, the signal processing of the cavity filter is usually completed by the tuning self-locking screw on the filter cover. Generally speaking, the problem of the tuning screw processing is the problem of signal intermodulation. Specifically, it refers to two different frequency signals. A signal of a new frequency generated by superposition in a system. [0003] The current common filters include cavity, cover and tuning self-locking screws. The filter cover is now mostly punched into the plate to form the tuning hole. On the one hand, the threaded hole is processed by punching. The defect rate is high and the manufacturing cost is too high. On the other hand, the punched tuning hole needs to be additionally installed with a tuning screw sleeve. The tuning screw sleeve is fixed on the tuning hole by welding, riveting, gluing, etc. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/207
Inventor 王强
Owner JOHNSON PRECISION ENG SUZHOU
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