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Filter and communication equipment

A technology for communication equipment and filters, applied in the field of communication, can solve the problems of poor stopband suppression performance, etc., and achieve the effect of good bandwidth low-end suppression, good bandwidth high-end suppression, and good low-end suppression.

Inactive Publication Date: 2021-10-29
ANHUI TATFOOK TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The inventors of the present application have found in the long-term research and development work that the existing cavity filters have poor stop-band suppression performance

Method used

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  • Filter and communication equipment
  • Filter and communication equipment
  • Filter and communication equipment

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0026] The terms "first" and "second" in this application are only used for descriptive purposes, and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cov...

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Abstract

The invention discloses a filter and communication equipment. The filter comprises a shell having a first direction and a second direction arranged perpendicular to each other; a filtering branch circuit which is arranged on the shell and is composed of ten filtering cavities which are coupled in sequence, wherein the eighth filtering cavity and the tenth filtering cavity of the filtering branch are in inductive cross coupling, the second filtering cavity and the fourth filtering cavity of the filtering branch are in capacitive cross coupling, and the sixth filtering cavity and the eighth filtering cavity of the filtering branch are in capacitive cross coupling, so three zero points of the filtering branch are formed; wherein the bandwidth range of the filter is from 718 MHz to 728 MHz. In this way, the stopband suppression performance of the filter can be improved.

Description

technical field [0001] The present application relates to the technical field of communication, in particular to a filter and a communication device. Background technique [0002] Cavity filter is the key equipment of modern mobile communication system, and is widely used in wireless communication base stations and various communication terminals; cavity filter is composed of radio frequency connector, cavity, cover plate, multiple resonator units, and frequency It is composed of tuning and coupling strength adjustment components. The resonant frequencies of multiple resonant units are distributed within the passband range, and have the function of blocking signals outside the resonant frequency, so as to realize the selection function of microwave transmission signals; the cavity filter has a reliable structure, Filter frequency bandwidth, parasitic passband away from the channel, high Q value, stable electrical performance, good heat dissipation performance, etc. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/208
CPCH01P1/208
Inventor 张宝真
Owner ANHUI TATFOOK TECH CO LTD
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