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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 complex and irregular arrangement of filter cavity, increase of filter volume, poor stopband suppression performance of cavity filter, etc. The effect of low-end suppression of bandwidth and high-end suppression of good bandwidth

Inactive Publication Date: 2021-10-22
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

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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 cove...

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Abstract

The invention discloses a filter and communication equipment. The filter comprises a transmitting filtering branch, which is composed of eight transmitting filtering cavities coupled in sequence; a first transmitting filtering cavity and a fourth transmitting filter cavity of the transmitting filtering branch, a fifth transmitting filtering cavity and an eighth transmitting filtering cavity of the transmitting filtering branch, and a sixth transmitting filtering cavity and the eighth transmitting filtering cavity of the transmitting filtering branch are in inductive cross coupling, the first transmitting filtering cavity and a third transmitting filtering cavity of the transmitting filtering branch are in capacitive cross coupling; the bandwidth range of the transmitting filtering branch is from 1860 MHz to 1875 MHz; The filter further comprises a receiving filtering branch composed of seven receiving filtering cavities which are coupled in sequence; a first receiving filtering cavity and a third receiving filtering cavity of the receiving filter branch are in inductive cross coupling, and a fifth receiving filtering cavity and a seventh receiving filtering cavity of the receiving filtering branch are in inductive cross coupling; a third receiving filtering cavity and a fifth receiving filtering cavity of the receiving filtering branch are in capacitive cross coupling; and the bandwidth range of the receiving filtering branch is from 1765 MHz to 1780 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): H01P1/208H01Q1/24
CPCH01P1/208H01Q1/241
Inventor 张宝真
Owner ANHUI TATFOOK TECH CO LTD
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