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Communication equipment, cavity filter, resonating tube and manufacturing method thereof

A technology of cavity filter and manufacturing method, applied in the field of filter, can solve problems such as high cost, and achieve the effects of low cost, reduced equipment cost and cost saving

Inactive Publication Date: 2010-11-10
ANHUI TATFOOK TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem in the prior art that the cost of using Invar material for the filter is very high, the present invention uses a material with a low linear expansion coefficient to manufacture the resonant tube, and also provides a cavity filter and communication equipment with the resonant tube

Method used

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  • Communication equipment, cavity filter, resonating tube and manufacturing method thereof
  • Communication equipment, cavity filter, resonating tube and manufacturing method thereof
  • Communication equipment, cavity filter, resonating tube and manufacturing method thereof

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Embodiment Construction

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0020] See figure 1 , figure 1 is a schematic diagram of a partial structure of a cavity filter 1 including a resonant tube 2 according to the first embodiment of the present invention.

[0021] Such as figure 1 As shown, in simple terms, the cavity filter mainly includes a cavity 1 , a resonance tube 2 , a tuning rod 3 and a cover plate 12 . Of course, the cavity filter of this embodiment also includes various other conventional components or structures. Here, ...

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Abstract

The embodiment of the invention discloses a cavity filter, a resonating tube and a manufacturing method thereof, wherein the resonating tube is installed in the cavity of the cavity filter; the resonating tube is made of ceramics and preferably made of the ceramics with a low linear expansion coefficient, particularly the cordierite ceramics; a metal layer is arranged on the surface of the resonating tube; and compared with the traditional resonating tube made of the invar material, the resonating tube made of the cordierite material has low cost and good temperature drift index. In addition, the embodiment of the invention also discloses communication equipment using the cavity filter, and the cavity filter is arranged on the signal transceiver circuit part of the communication equipment and used for selecting the signals. The resonating tube made of the cordierite can effectively reduce the equipment cost.

Description

【Technical field】 [0001] The invention relates to the technical field of filters, in particular to a cavity filter, a resonance tube and a manufacturing method, and also relates to a communication device using the cavity filter. 【Background technique】 [0002] At present, the frequency spectrum of the communication system is becoming more and more crowded. Mobile communication is developing from GSM900, 1900MHz to TD2010-2025MHz, Wimax 3.5GHz high-frequency band, the volume of the cavity filter is getting smaller and smaller, and the structure of the base station system is more compact and flexible. The temperature drift of the cavity filter (hereinafter referred to as temperature drift) generally increases with the increase of the frequency band. At low frequencies, the temperature drift index of the filter is relatively small. The temperature drift is already very large. [0003] During the research and practice of the prior art, the inventors of the present invention fou...

Claims

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Application Information

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IPC IPC(8): H01P1/207H01P11/00
CPCH01P7/06H01P1/2053
Inventor 孙尚传周彦昭
Owner ANHUI TATFOOK TECH CO LTD
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