3cm I-shaped waveguide gradient line impedance converter

Abstract

The invention belongs to the electrics technical field and relates to a 3CM I-shaped waveguide tapered line impedance converter. The 3CM I-shaped waveguide tapered line impedance converter comprises acircular transition waveguide; the output end of the circular transition waveguide is connected with a load circular waveguide; a pair of ridges are fixedly connected in the circular transition waveguide; the two ridges are symmetrically arranged in the cavity of the circular transition waveguide; the two ridges extend along the input end of the circular transition waveguide so as to extend to the load circular waveguide in a transitional manner; the outer ridge surfaces of the two ridges are matched with the inner wall of the circular transition waveguide; and the inner ridge surfaces of thetwo ridges are both curved surfaces in exponential tapered line transition. With the 3CM I-shaped waveguide tapered line impedance converter of the invention adopted, the influence of the unevennessof step change between an external connection circular waveguide and an I-shaped waveguide in the prior art can be decreased; the I-shaped ridges change gradually, and the tail ends of the ridges areattached to the surface of the circular waveguide, and therefore, the influence of step change can be eliminated, the problems of a traditional impedance converter can be well solved, and input impedance can be 18 ohms, output impedance can be 720.28 ohms, a transformation ratio can be 1:40, and transmission loss is less than 10dB.

Description

technical field [0001] The invention belongs to the technical field of electricity and relates to electrical components, in particular to a 3CM I-shaped waveguide gradient line impedance converter. Background technique [0002] Impedance transformers are passive microwave devices often used in microwave engineering to achieve matching between transmission lines and loads (or microwave sources). With the help of it, the magnetron can convert the high impedance of the external transmission waveguide to the low lead-in resistance required by the magnetron. The frequency band characteristics of the impedance converter directly affect the working characteristics of the magnetron. Improving efficiency and increasing stability play a decisive role. The traditional magnetron waveguide impedance converter is made up of a waveguide with a length of λg / 4 (as attached to the prior art figure 1 As shown), the structure is simple and easy to process, but the matching bandwidth is very n...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of narrow operating frequency band of the magnetron energy exporter and ignition of high-power waveguide, the present invention provides a 3CM I-shaped waveguide gradient line impedance converter

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