Broadband rectangular waveguide-microstrip converter

Abstract

The invention discloses a broadband rectangular waveguide microstrip converter. The converter comprises a rectangular waveguide, a waveguide flange plate, a PCB four-layer plate and a substrate integrated waveguide, wherein the waveguide flange plate comprises four mounting holes for fixing the rectangular waveguide on the PCB four-layer plate, and the PCB four-layer plate comprises four layers ofmetal floors, three microwave dielectric substrates and a microstrip circuit; the first metal floor and the second metal floor are provided with windows of the same size, metal patches of different sizes are arranged in the windows respectively, the windows correspond to the rectangular waveguide openings in position, a circle of metallized through holes are formed in the peripheries of the windows, and the third metal floor is provided with two gaps of different sizes; The substrate integrated waveguide is located on the third microwave dielectric substrate and used for a transition part between the rectangular waveguide and microstrip circuit signal transmission, and the designed rectangular waveguide microstrip converter has the advantages of being wide in frequency band and small in loss and has wide application prospects in the fields of millimeter wave radars and communication.

Description

technical field [0001] The invention relates to a rectangular waveguide-microstrip converter suitable for microwave and millimeter wave circuit systems, in particular to a wide-band rectangular waveguide-microstrip converter. Background technique [0002] Microwave and millimeter wave systems often need to propagate electromagnetic waves of different modes, and rectangular waveguide-microstrip conversion is one of the most commonly used microwave circuit conversion structures. Several commonly used rectangular waveguide-microstrip conversion structures include: rectangular waveguide-probe-microstrip conversion structure, rectangular waveguide-ridge waveguide-microstrip conversion structure, rectangular waveguide-paired ridge fin line-microstrip conversion structure, etc. [0003] In the conventional rectangular waveguide microstrip conversion structure, the rectangular waveguide and the microstrip line are on the same side of the microwave dielectric plate. When the end of t...

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Problems solved by technology

[0005] The purpose of the embodiment of the present invention is to provide a broadband rectangular waveguide-microstrip converter to solve the problem that the rectangular waveguide in the existing rectangular waveguide microstrip conversion structure will affect the antenna radiation at the end of the radio frequency circuit and the mismatch of electromagnetic waves passing through different layers of plates. The problem

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