Screw device and cavity filter using the same

A cavity filter and screw technology, which is applied to waveguide devices, nuts, bolts, etc., can solve the problems of inconvenient use and increase the thickness of the filter, and achieve the effect of increasing the thickness

Active Publication Date: 2008-12-03
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, a kind of tuning is provided through a screw and a nut. Firstly, the nut and the screw are fixedly placed above the cavity, and then the screw is screwed to penetrate into the cavity to achieve the tuning effect. However, the inventor is In practice, it is found that the existing technology is inconvenient to use due to the need for nut fixing, and the tuning screw protrudes out of the cavity and even exceeds the thickness of the nut, thereby increasing the thickness of the filter

Method used

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

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Embodiment Construction

[0015] An embodiment of the present invention provides a screw device, the screw device includes a screw rod and a conductive rigid rod fixed to the screw rod; at least part of the screw rod has threads, and in at least one section of the screw rod having a threaded portion, The pitch of at least one pair of adjacent threads is not equal to the pitch of other adjacent threads. And correspondingly, a cavity filter is also provided, the cavity filter includes at least one cavity, and the cavity is provided with a threaded hole that cooperates with the screw device, and the screw device Adjustably fits in the threaded hole. By changing the pitch of the thread, the purpose of self-locking is realized, and the screw device will not exceed the cavity, nor will the thickness of the filter be increased.

[0016] The recommended embodiments of the screw device provided by the present invention and the cavity filter using the screw device will be described in detail below with referenc...

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Abstract

The embodiment of the invention relates to a cavity filter, providing a screw device and a cavity filter which uses the screw device; the cavity filter is directly screwed into the cavity of the filter by a screw; the object of self-locking is achieved by changing the space of the thread; furthermore, as the nut is not required, the screw is tuned in the cavity and is self-locked; therefore, the cavity filter does not exceed the cavity and increases no thickness of the filter.

Description

technical field [0001] The invention relates to a cavity filter, in particular to a screw device in the cavity filter and a cavity filter using the screw device. Background technique [0002] Due to various cost reasons such as transportation, site acquisition, and site rent, the radio frequency modules of radio base stations show a trend of miniaturization. A cavity filter is usually included in a radio frequency module, therefore, how to miniaturize the structure of the cavity filter has become one of the concerns. [0003] Cavity filters usually include a cover plate and multiple cavities, each cavity has one or more resonant columns, and each cavity functions as an electronic oscillation circuit. When the filter is tuned to the received signal For a quarter wavelength, the oscillating circuit can be expressed as a parallel oscillating circuit including an inductance part and a capacitor part. By adjusting the inductance part or the capacitor part, the resonant frequency...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/208H01P7/06
CPCH01P7/06F16B33/02H01P7/04
Inventor 徐灏文袁本贵优诺·韩宁森雍鹏马建忠周建军朱银虎
Owner HUAWEI TECH CO LTD
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