Band-pass filter based on triangular substrate integrated resonator

Abstract

The invention discloses a band-pass filter based on a triangular substrate integrated resonator. The band-pass filter comprises a first resonant cavity, a second resonant cavity, a third resonant cavity, a first microstrip line, and a second microstrip line, the first resonant cavity, the second resonant cavity, and the third resonant cavity both comprise a top metal layer, a medium substrate, and a bottom metal layer arranged in parallel in sequence from top to bottom, the top metal layer, the medium substrate, and the bottom metal layer are congruent obtuse isosceles triangles with the obtuse angle of 120 degrees, the medium substrate is distributed with a metallized through hole parallel to three edges of the medium substrate, the first resonant cavity, the second resonant cavity, and the third resonant cavity respectively regard two side surfaces which the obtuse angles of the three cavities belong to as coupling surfaces, each two side surfaces are coupled to form an equilateral triangle resonant cavity, the first microstrip line is connected with a midpoint of an edge which belongs to the first resonant cavity in edges of the equilateral triangle resonant cavity, and the second microstrip line is connected with a midpoint of an edge which belongs to the second resonant cavity in the edges of the equilateral triangle resonant cavity. According to the band-pass filter, the contradiction between the increase of the frequency range and the difficulty of industrial processing of the filter is solved.

Description

technical field [0001] The invention belongs to the technical field of millimeter waves, and in particular relates to a band-pass filter based on a triangular substrate integrated resonator. Background technique [0002] In modern wireless communication, the microwave frequency band communication system has a lot of services, and the frequency resources are extremely tight. Future communication technology is developing towards a higher frequency band—millimeter wave. As a part used to separate signals, a filter is one of the key parts in a wireless communication system. Triangular substrate integrated resonators have the characteristics of high quality factor, low insertion loss, compact structure, high power capacity, etc., and are widely used in modern communications. As the frequency range continues to increase, the size of millimeter wave devices will continue to shrink. When the design size of millimeter-wave devices is reduced to a certain extent, due to the limitati...

AI Technical Summary

Problems solved by technology

When the design size of millimeter wave devices is reduced to a certain extent, due to the limitations of industrial processing technology, it will not be able to be precisely processed

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