Microminiature choke for transmission shaft in waveguide

Abstract

The invention discloses a microminiature choke for a transmission shaft in waveguide. The microminiature choke comprises a transmission shaft, a waveguide external wall and a dielectric slab, wherein the waveguide external wall sleeves the transmission shaft; a first round hole and a second round hole which are used for penetrating the transmission shaft and formed in the shape of steps to each other; the diameter of the first round hole is smaller than that of the second round hole; the dielectric slab sleeves the transmission shaft, is positioned in the second round hole, and makes close contact with the waveguide external wall; and the transmission shaft does not make contact with the waveguide external wall and the dielectric slab, with gaps reserved therebetween. The microminiature choke for the transmission shaft in waveguide is not limited to quarter-wavelength so that the choke can be designed more flexibly, and appropriate axial length and radial length can be optimized and selected according to actual requirements. In addition, dielectric loading is adopted in a radial waveguide impedence section so that waveguide wavelength is effectively reduced, length required by impedance transformation is decreased, and the choke can be further miniaturized. The microminiature choke for the transmission shaft in waveguide is very simple in structure, easy to manufacture and realize, and suitable for choke places which are very strict in size.

Description

technical field [0001] The invention belongs to the field of microwave transmission, in particular to the field of microwave leak-proof devices, in particular to an ultra-small choke device used for a transmission shaft in a waveguide. Background technique [0002] The choke device is a device to avoid microwave leakage. At present, choke devices are widely used in the cross-connection of microwave antenna feeder systems, rotary joints in various mechanical scanning radars, non-contact short-circuit pistons, and household microwave ovens. They are key devices in microwave engineering. People have designed a variety of choke devices according to the actual application needs, and the typical ones include microwave heating chokes [Chen Shaoping, research on open-type microwave heaters, Modern Electronic Technology, 2006 (7)], with chokes structure antenna [Xiang-YUCao, Analysis of CoaxialMultimodeHornofTwoChokes, IEEE1998], dual-channel combined rotary joint [Wang Qunjie, etc....

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an ultra-small choke device for the transmission shaft in the waveguide, which solves the problem of microwave leakage at the entrance of the transmission shaft after the transmission shaft is introduced into the waveguide. It has ultra-small volume, easy processing and realization, and less energy leakage. specialty

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