Microcalorimeter, power reference system utilizing microcalorimeter and measuring method

Abstract

The invention provides a microcalorimeter, a power reference system utilizing the microcalorimeter and a measuring principle thereof. The microcalorimeter has an structure of an auxiliary heater, the power reference system applies current bias to the auxiliary heater of the microcalorimeter by the aid of an auxiliary heating direct-current substitute instrument so as to realize direct-current substitution measurement to a heat insulation section, and effective efficiency of a working end can be acquired by a short-circuiter and calibration tests. Affection on a thermistor mount according to the transfer standards is eliminated during computing, S parameter measurement and side-arm power monitoring are omitted, tracing patch of the radiofrequency power reference is changed, and only voltage reference can be traced. In addition, the power reference system utilizing the measuring principle will be the national radio power reference.

Description

technical field [0001] The invention relates to the technical field of microwave power reference measurement, in particular to a microcalorimeter, a power reference system using the microcalorimeter and a measurement method thereof. Background technique [0002] Due to the high measurement accuracy of power benchmarks based on calorimetry, calorimeters or microcalorimeters are often used as national microwave power benchmarks. The calorimeter uses the microwave load as the microwave power absorbing part, while the microcalorimeter uses the thermistor base as the microwave power absorbing part. The latter has the characteristics of fast response, convenient transmission and simple operation. The purpose of the microcalorimeter is to measure the effective efficiency of the thermistor mount. [0003] At present, microcalorimeters are used in all countries in the WR22 (33GHz-50GHz) frequency band. like figure 1 Shown is the structural diagram of the existing microcalorimeter....

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Problems solved by technology

[0022] As can be seen from the above description, the shortcoming of the prior art is that the S parameters of the crowbar, directional coupler, and power base need to be measured with a network analyzer, so that the uncertainty will be traced to the network parameters, and the network parameters are related to the network parameters. Power is closely related, so there will be a contradiction

And in the existing microcalorimeter evaluation process, it is necessary to measure the scattering parameters of the short circuit, thermistor base, and equivalent signal source, and the uncertainty can be traced to the network analyzer

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