Filter and communication equipment

A filter and filter cavity technology, applied in the field of communication, can solve the problems of poor stop band suppression performance of cavity filters, complex and irregular arrangement of filter cavities, and increased filter volume, etc.

Pending 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 found in the long-term research and development work that the arrangement of multiple filter cavities in th

Method used

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

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Embodiment Construction

[0030] 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.

[0031] 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 is characterized in that a first transmitting filtering branch circuit is composed of eleven transmitting filtering cavities which are coupled in sequence, and five capacitive cross coupling zero points are formed; a second transmitting filtering branch circuit is composed of eight transmitting filtering cavities which are coupled in sequence, and three capacitive cross coupling zero points are formed; a first receiving filtering branch circuit is composed of nine receiving filtering cavities which are coupled in sequence, and three inductive cross coupling zero points are formed; a second receiving filtering branch circuit is composed of seven receiving filtering cavities which are coupled in sequence, and three capacitive cross coupling zero points are formed. 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 tuning Composed of coupling strength adjustment components, the resonant frequencies of multiple resonant units are distributed within the passband range, and have a blocking function for signals outside the resonant frequency, thereby realizing the selection function of microwave transmission signals; the cavity filter has a reliable structure, filtering Wide frequency bandwidth, parasitic passband away from the channel, high Q value, stable electrical performance, good heat dissipation performance, etc. [0003] Th...

Claims

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Application Information

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IPC IPC(8): H01P1/208H01P1/209
CPCH01P1/208H01P1/209
Inventor 符其略李华
Owner ANHUI TATFOOK TECH CO LTD
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