Screw device and cavity filter using same

A screw and thread technology, applied in the field of cavity filters, can solve problems such as increasing the production cost of cavity filters

Active Publication Date: 2010-12-22
ANHUI TATFOOK M&E TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, each tuning screw of the above-mentioned cavity filter requires an additional fixing nut. For a cavity filter with multiple resonant tubes that need to be tuned, a large number of fixing nuts are required, so the cavity filter is greatly increased. device production cost

Method used

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  • Screw device and cavity filter using same
  • Screw device and cavity filter using same
  • Screw device and cavity filter using same

Examples

Experimental program
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Embodiment Construction

[0019] This embodiment provides a screw device, which includes a screw rod and a rigid conductor rod fixedly connected to the screw rod. The screw rod at least includes a threaded part and a non-threaded part connected with the threaded part, and the cross-sectional expansion of the non-threaded part perpendicular to the axis of the screw is smaller than the cross-sectional expansion of the major diameter of the threaded part, and larger than the The expansion of the cross-section where the small thread diameter of the threaded part is located, grooves along the extending direction of the screw axis are provided on the non-threaded part. In addition, this embodiment also provides a cavity filter using the above screw device, the cavity filter includes a cavity, at least one cavity is provided on the cavity, and the cavity forming the cavity A screw hole is provided at the bottom of the cavity, and the screw device is rotatably matched with the screw hole. The unthreaded part i...

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Abstract

The invention relates to a screw device which comprises a screw rod and a rigid conductor rod fixedly connected with the screw rod, wherein the screw rod at least comprises a non-thread part and a first thread part, the section expansion of the non-thread part in the direction which is vertical to the extension direction of the axial line of the screw rod is smaller than that located by the large diameter of a thread of the first thread part and larger than that located by the small diameter of the thread of the first thread part, and a groove along the extension direction of the axial line of the screw rod is arranged on the non-thread part. The screw device can realize self-locking without a nut, thereby greatly reducing the cost in comparison with the adoption of the nut for locking a screw. In addition, the invention further provides a cavity filter using the screw device.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a screw device and a cavity filter using the screw device. Background technique [0002] As a frequency selection device, filters are widely used in the field of communication, especially in the field of radio frequency communication. In the base station where the communication system completes signal transmission and reception, 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] At present, in mobile communication base station systems, cavity filters are commonly used to select frequencies for signals transmitted and received by antennas. The cavity filter includes a cavity body and a cover plate, and a plurality of cavities are arranged on the cavity body. A resonant tube is formed on the bottom of each cavity in the cavity. The interior of the resonant tube ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): F16B35/04F16B39/284H01P1/207
Inventor孙尚传司晓峰
OwnerANHUI TATFOOK M&E TECH