Novel sealed constant-temperature double-load waveguide calorimeter

Abstract

Disclosed in the invention is a novel sealed constant-temperature double-load waveguide calorimeter comprising a sealed cylinder, a sealed cylinder cover, a working link, a reference link, a waveguide port, and a thermopile. The working link and the reference link are sealed by sealing rings of the sealed cylinder cover; and the 2-mm standard waveguide port is formed in the sealed cylinder cover at one side of the working link according to the waveguide dimension and is used for inputting a 2-mm-frequency waveguide. The reference link is used for providing a temperature reference for the working link and the working link is used for inputting a direct-current power and a microwave power, thereby changing a thermoelectric force of the thermopile with the temperature change. According to the temperature value of the reference link, a temperature difference thermoelectric force is obtained; and then a microwave power value is obtained by calculation. According to the technical scheme, with the double-load calorimetric technology, the temperature control on the calorimeter is realized by a constant-temperature water tank; and the 2-mm calorimetric power standard is set and the power level is 1mW. A valuation transfer demand of a power parameter in a frequency range of 110GHz to 170GHz can be satisfied.

Description

technical field [0001] The invention relates to a calorimeter. More specifically, it relates to a novel sealed constant temperature double load waveguide calorimeter. Background technique [0002] Power is one of the most basic parameters in the field of microwave and millimeter waves, and it is also an important parameter to characterize the characteristics of microwave and millimeter wave signals. Therefore, the microwave radio standard laboratories of various countries have carried out the research and construction of power standards very early. There are two main ways to implement microwave and millimeter wave low power standards: calorimeter and microcalorimeter. The calorimeter is an instrument for measuring the temperature change after the load absorbs power, and the value of the measured microwave power is obtained according to the difference between the temperature change caused by the DC power and the microwave power. It has the advantages of high measurement ac...

AI Technical Summary

Problems solved by technology

[0007] An object of the present invention is to provide a new type of sealed constant temperature double load waveguide calorimeter to solve the problem of insufficient frequency range of existing power standard devices and to meet the traceability requirements of millimeter wave small power parameters in the frequency band of 110 GHz to 170 GHz

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