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High-Q cross-coupled slot waveguide microwave filter

A microwave filter and cross-coupling technology, which is applied to waveguide devices, electrical components, circuits, etc., can solve the problem of poor selectivity in the transition zone of slotted waveguide filters, and achieve high quality factor and strong selectivity.

Active Publication Date: 2019-06-11
广东昌宝科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the dispersion characteristics of the structure, the selectivity of the transition band of the slot waveguide filter, especially the upper sideband, is poor

Method used

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  • High-Q cross-coupled slot waveguide microwave filter
  • High-Q cross-coupled slot waveguide microwave filter
  • High-Q cross-coupled slot waveguide microwave filter

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] see figure 1 , a high-Q cross-coupled slot waveguide microwave filter, comprising a rectangular metal bottom plate 1 and a metal top plate 3, the metal bottom plate 1 and the metal top plate 3 are rectangular, the material is aluminum or copper, and the four corners of the metal top plate 3 There are screw holes 4 each with a diameter of 2mm, and four cuboid cut corners are arranged on the four corners of the lower side, and the size of the cut corners is 4mm×4mm×3mm.

[0023] Four metal square pillars 2 are arranged between the metal bottom plate 1 and the metal top plate 3, which are the supporting structures for the metal top plate 3. The four metal square pillars 2 are located at the four corners of the metal bottom plate 1. The four metal square pillars 2 is a square with a cross-section of 4mm×4mm and a height of 10mm, and four metal square colu...

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Abstract

The invention relates to a high-Q cross-coupled slot waveguide microwave filter, comprising a rectangular metal bottom plate, a plurality of metal stand columns, a metal square column and a metal topplate; the metal stand columns are positioned on the metal bottom plate, the metal square column is used for supporting the structure, an air gap is reserved between the metal stand column and the metal top plate and constitutes an electromagnetic band gap structure together with the metal stand columns, the metal bottom plate and the metal top plate, the metal stand columns together with the metal bottom plate and the metal top plate forms five cuboid cavities, five resonant cavities are formed, two rows of metal stand columns are arranged between the adjacent resonant cavities and are used for energy coupling between the adjacent resonant cavities, metal round columns are respectively arranged at the centers of the first cavity, the second cavity, the third cavity and the fifth cavity onthe metal bottom plate, two metal circular holes are formed in the metal top plate right above the first cavity and the fifth cavity, the two metal circular holes are arranged as two feeding ports, and the two feeding ports are used for feeding the filter from the top side through a coaxial probe. The filter has a relatively high load-free quality factor; and meanwhile, the filter has the characteristic of being higher in selectivity.

Description

technical field [0001] The invention relates to a waveguide resonant cavity filter, in particular to a high-Q cross-coupling slot waveguide microwave filter. Background technique [0002] With the rapid development of wireless communication, spectrum resources become very tight, so higher requirements are placed on the performance of microwave filters. Microwave filters with characteristics such as high selectivity and low insertion loss have begun to receive widespread attention. In addition, the frequency of the communication system is extended to higher frequency bands. In the millimeter wave band and higher frequency communication systems, the microstrip structure filter is no longer applicable due to the disadvantages of large radiation loss, insertion loss, and serious dispersion effect. Due to the complexity of the structure of the coaxial filter, higher requirements are placed on the processing technology and cost. Filters with a rectangular waveguide structure ar...

Claims

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Application Information

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IPC IPC(8): H01P1/208
Inventor 张安学舒敏杰陈建忠杨倩张洋洋张巧
Owner 广东昌宝科技股份有限公司
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