High power waveguide impedance transformer

An impedance converter and high-power technology, which is applied in the direction of instruments, measuring electrical variables, measuring devices, etc., can solve problems such as unstable working conditions and large leakage of microwave power, and achieve the effect of convenient and accurate measurement and avoiding microwave leakage

Active Publication Date: 2012-04-11
GUANGDONG WITOL VACUUM ELECTRONICS MFR
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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 pl...

Method used

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Embodiment Construction

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] like figure 1 , figure 2 As shown, the present invention includes: a main waveguide 1 with a rectangular cross-section, the main waveguide 1 is a waveguide with a diameter corresponding to the microwave frequency of the high-power source to be tested; a water load 2 with circulating water inside as a microwave absorber is short-circuited The piston member 3 and the terminal short-circuit piston block 8, the wavelength of the working waveguide of the present invention is λg, and it is characterized in that the front end of the water load 2 is in the shape of a cone, and the rear end of the water load 2 is cylindrical and connected with the short-circuit piston member 3, The cone at the front end of water load 2 and the cylindrical shape at the rear end smoothly transition. The length of the cone structure at the front end of water load 2 is La≥1λg, the cone angle...

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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...

Claims

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Application Information

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IPC IPC(8): G01R1/20G01R31/00
Inventor 黄启先王彩育胡再兴王贤友
Owner GUANGDONG WITOL VACUUM ELECTRONICS MFR
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