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, achieve good bandwidth low-end suppression, good bandwidth high-end suppression, and improve stop-band suppression performance

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 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

[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 comprises a shell having a first direction and a second direction arranged perpendicular to each other; a transmitting filtering branch circuit which is arranged on the shell and is composed of eleven transmitting filtering cavities which are coupled in sequence, wherein a second transmitting filtering cavity and a fourth transmitting filtering cavity of the transmitting filtering branch circuit are in inductive cross coupling; the capacitive cross coupling is performed between a second transmitting filter cavity and a fifth transmitting filter cavity, between a sixth transmitting filter cavity and an eighth transmitting filter cavity, and between a ninth transmitting filter cavity and an eleventh transmitting filter cavity of the transmitting filter branch; wherein the bandwidth range of the transmitting filtering branch is 860 to 894 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): H01P1/208H01P1/209
CPCH01P1/208H01P1/209
Inventor 张宝真
Owner ANHUI TATFOOK TECH CO LTD
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