Filter and communication equipment

A filter and filter cavity technology, which is applied in the field of communication, can solve problems such as increased filter volume, complex and irregular filter cavity arrangement, and poor stop-band suppression performance of cavity filters, so as to improve the stop-band suppression performance and achieve good The effect of bandwidth low-end suppression and good bandwidth high-end suppression

Pending Publication Date: 2021-10-29
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

[0024] 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.

[0025] 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 twelve filtering cavities which are coupled in sequence, wherein inductive cross coupling is performed between a second filtering cavity and a fourth filtering cavity of the filtering branch, between the fourth filtering cavity and a sixth filtering cavity of the filtering branch, between the sixth filtering cavity and an eighth filtering cavity of the filtering branch and between the eighth filtering cavity and an eleventh filtering cavity of the filtering branch; the ninth filtering cavity and the eleventh filtering cavity of the filtering branch are respectively in capacitive cross coupling so as to form five cross coupling zero points of the filtering branch; wherein the bandwidth range of the filter is from 3,400 MHz to 3,600 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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