High power waveguide impedance transformer

Abstract

The invention relates to a high power waveguide impedance transformer that comprises a main waveguide, a water load, a short-circuit piston part and a terminal short circuit piston block, wherein circular flow water is used as a microwave absorber in the water load. The working waveguide wavelength of the transformer is lambda g. The front end portion of the water load is in a cone shape as well as the rear end of the water load is in a cylindrical shape and is connected with the short-circuit piston part. There is smooth transition between the front end cone and the rear end cylinder. The length L of the cone is greater than or is equal to 1 lambda g and the cone angle of the cone is from 5 degrees to 15 degrees. The length Lb of the cylinder is in a range of from 1 lambda g to 1.5 lambda g. According to the invention, an input standing-wave ratio can be adjusted in a range of from 1.05 to 5.0 and a phase variance can be adjusted in a range of from 0 degree to 180 degrees; the fluctuation range of the standing-wave ratio is basically in a ranged of -5% to +5%; after a corresponded waveguide caliber size is changed, the transformer can work at different frequencies from 2.0 GHz to 12.4 GHz; therefore, the transformer can be conveniently applied to accurate measurement on a performance parameter of a high power microwave signal source and microwave leakage can be avoided.

Description

technical field [0001] The invention is a high-power waveguide impedance converter, which can be used for measuring the load characteristics and working characteristics of a microwave tube and a high-power signal source in a high-power microwave test system. Background technique [0002] With the development of microwave technology, microwave ovens and industrial microwave equipment have been widely used in various fields. However, the microwave tube or high-power microwave signal source that is usually used as the power source of microwave ovens or industrial microwave equipment needs to measure its ability to withstand and respond to load changes (that is, the load characteristics usually evaluated). Therefore, when measuring the power source , a corresponding standard load with larger power capacity is required. When the load standing wave coefficient of the commonly used single-screw impedance converter is greater than 3, the leakage of microwave power from the slot wh...

AI Technical Summary

Problems solved by technology

When the load standing wave coefficient of the plug-type single-screw impedance converter generally used is greater than 3, the microwave power leakage from the slot where the plug is inserted is large, and the electric field is too concentrated at the screw to cause discharge phenomenon (commonly known as for ignition) resulting in unstable working conditions

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