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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: 2021-11-26
ANHUI TATFOOK TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 the existing cavity filter is complex and irregular, which increases the filter volume and leads to poor stop-band suppression performance of the cavity filter

Method used

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

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Embodiment Construction

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present 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.

[0030]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 variat...

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Abstract

The invention discloses a filter and communication equipment. The filter includes a shell; a transmitting filter branch is coupled with a common cavity and consists of eight transmitting filter cavities which are coupled in sequence; the transmitting filter branch is arranged on the shell and consists of eight transmitting filtering cavities which are coupled in sequence; the fifth transmitting filter cavity and the seventh transmitting filter cavity of the transmitting filter branch are in capacitive cross coupling; the fifth transmitting filter cavity and the eighth transmitting filter cavity of the transmitting filter branch are in inductive cross coupling; the bandwidth range of the transmitting filtering branch is from 935 MHz to 960 MHz; a receiving filter branch is coupled with the common cavity and consists of nine receiving filtering cavities which are coupled in sequence; capacitive cross coupling is performed between the fourth receiving filter cavity and the sixth receiving filter cavity, between the sixth receiving filter cavity and the ninth receiving filter cavity, and between the seventh receiving filter cavity and the ninth receiving filter cavity of the receiving filter branch; and the bandwidth range of the receiving filter branch is 890 MHz to 915 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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IPC IPC(8): H01P1/208H01P1/209
Inventor 刘建伟钟志波
Owner ANHUI TATFOOK TECH CO LTD
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