Thermistor sensor

Abstract

The invention relates to a thermistor sensor which comprises a wide-temperature heat insulation transmission section, double thermistor pairs and a self-adaptive constant-temperature control unit, wherein the wide-temperature heat insulation transmission section comprises an inner conductor and an outer conductor; the outer conductor comprises an outer conductor first section and an outer conductor second section, and the inner conductor comprises an inner conductor first section and an inner conductor second section; the pipe orifice of the first section of the outer conductor is butted withthe pipe orifice of the second section of the outer conductor to form a communicated cavity; the inner conductor first section and the inner conductor second section are both arranged in the cavity, the inner conductor first section is sleeved with the outer conductor first section, and the inner conductor second section is arranged in the outer conductor second section; the outer conductor firstsegment and the inner conductor first segment are both made of heat conduction materials, and the outer conductor second segment and the inner conductor second segment are both made of heat insulationmaterials; the double thermistor pairs are partially embedded into the outer conductor second section; and an outer conductor heating section is arranged on the outer pipe wall of the outer conductorsecond section, and a self-adaptive constant-temperature control unit is arranged on the outer conductor heating section. The thermistor sensor can be separated from a laboratory environment to measure the microwave power.

Description

technical field [0001] The present disclosure relates to the field of microwave power measurement, in particular to a thermistor sensor. Background technique [0002] The power sensor made of thermistor as the microwave power measurement element has the advantages of high measurement accuracy, good stability and high repeatability, and is widely used in the design of microwave power reference and power transfer standard seats, as well as microwave power sensors with general performance. [0003] At present, the thermistor sensors used for microwave power reference and power transfer standards all use a single thermistor pair structure, combined with a temperature control cavity or a relatively heat-insulating structure, to achieve a certain degree of thermal sensitivity in a constant temperature control mode. Resistance microwave power measurement. [0004] Another general-purpose microwave power sensor adopts a double thermistor pair structure, using one pair of thermistor...

AI Technical Summary

Problems solved by technology

[0005] However, the above two sensors are only suitable for the ambient temperature of the laboratory, and cannot measure the microwave power at room temperature.

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