A calorimetric microwave and millimeter wave medium and low power measurement system and method

Abstract

The invention discloses a calorimetric microwave millimeter wave medium and low power measurement system and method, comprising: a power absorption conversion module, a cycle constant temperature module, two temperature measurement modules, a data acquisition and post-processing module, a flow meter and a controller module ;The cavity structure absorbs and converts the microwave and millimeter wave electromagnetic field energy into heat and transfers the heat to the cavity wall; the circulation constant temperature module is used to generate liquid circulation and continuously take away the heat generated by the power absorption conversion module; 2 temperature measurement modules They are respectively used to measure the temperature of the liquid flowing into the inlet of the power absorption conversion module and the outlet of the power absorption conversion module; the flow meter and controller module are used to control and measure the flow of the liquid; the data acquisition and post-processing module is used for system-based The measured data is calculated to obtain the microwave power value. This system overcomes the problems that the direct measurement and high-power water load method cannot measure the microwave millimeter wave power of several watts to hundreds of watts, and the coupling measurement method has insufficient accuracy.

Description

technical field [0001] The invention relates to the field of microwave and millimeter wave power measurement, in particular to a calorimetric microwave and millimeter wave medium and low power measurement system and method. Background technique [0002] Usually, there are several methods for measuring microwave and millimeter wave sources: (1) direct measurement method, through which microwave power probes of corresponding frequencies are used to directly measure microwave power. Equipment and instruments using this measurement method and corresponding power probes are available on the market. The measurement method has high precision, fast response and can be calibrated. However, the power threshold measured by such instruments and probes is generally at the watt level, which cannot measure higher power microwave and millimeter waves. (2) Use a high-power water load power meter to measure. This measurement method uses water as a microwave absorption medium, absorbs microwa...

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Problems solved by technology

[0003] The present invention proposes a calorimetric microwave and millimeter wave medium and low power measurement system and method, the purpose of which is to overcome the inability of direct measurement and high-power water load method to measure microwave millimeter wave power of several watts to hundreds of watts, and the accuracy of coupling measurement method not enough problem

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