Cross coupling flying rod-free microwave filter with multiple transmission zeros

A microwave filter and cross-coupling technology, which is applied in the field of filters, can solve the problems of reducing product reliability, high processing costs, and limiting product debugging efficiency, etc., and achieves the effect of easy processing and assembly and simple mechanical structure

Inactive Publication Date: 2011-04-13
PIVOTONE COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this type of cross-coupling requires additional components, such as metal flying rods and supporting materials, whi

Method used

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  • Cross coupling flying rod-free microwave filter with multiple transmission zeros
  • Cross coupling flying rod-free microwave filter with multiple transmission zeros
  • Cross coupling flying rod-free microwave filter with multiple transmission zeros

Examples

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[0014] like figure 1 As shown, a schematic structural diagram of an 8-stage filter of the microwave filter according to the present invention is given. 9 is the RF input connector for transmitting RF signals, 10 is the RF output connector for transmitting RF signals, all of which extend into the resonant cavity, and 11 is the Error! Not a valid link. The floor plan of the physical structure of its implementation is as follows figure 2 As shown, cavity 1 and 4 are Hz field coupling, for Hz field coupling, "+" indicates that the direction of the field is the direction of breaking through the paper from the inside to the outside, "o" indicates that the field is the direction of entering the paper from the outside to the inside; Body 5 and 8 are Hφ coupling, and the direction of the rapier indicates the direction of the magnetic field. The coupling magnetic field of cavity 1 to 4 can be synthesized by TE01 mode dielectric cavity, and the coupling magnetic field of cavity 5 to 8...

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PUM

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Abstract

The invention discloses a cross coupling flying rod-free microwave filter with multiple transmission zeros. The microwave filter is formed by cascading two filtering modules, wherein the two filtering modules are conventional asymmetrical filtering modules and are respectively an H phi coupling cavity and an H z coupling cavity. In the microwave filter, a cross coupling flying rod arranged on a cover plate and a corresponding supporting material in the conventional design are saved, multiple symmetrical or asymmetrical transmission zeros are generated by adopting nonadjacent resonant cavity coupling, and the microwave filter has a simple structure and is easy to process and assemble, correspondingly reduces the production cost and simultaneously improves the product reliability.

Description

technical field [0001] The invention relates to a filter, in particular to a microwave filter with multiple transmission zeros without cross-coupling fly rods. Background technique [0002] The design scheme in which all cavities are on the same plane is a commonly used technical scheme for filter design in wireless base station systems today. This design scheme is characterized by simple mechanical structure, easy processing and assembly; it uses non-adjacent resonant cavity coupling , the cavity filter can produce symmetrical or asymmetrical transmission zeros on both sides of the passband, that is, the stopband, which can meet the desired out-of-band suppression index requirements. Usually cross-coupled windows or cross-coupled fly rods are used in this design to generate different required transmission zeros. However, this type of cross-coupling requires additional components, such as metal flying rods and supporting materials, which will limit product debugging efficie...

Claims

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Application Information

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IPC IPC(8): H01P1/208
Inventor 梁基富梁国春宋永民
Owner PIVOTONE COMM TECH
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