定标热敏电阻型功率传感器定标结果的研究  

Study on Calibration Results of Thermistor-Type Power Sensors

作　　者：聂禄 李向军[1] 崔孝海[2] 王梓灏 赵岩 NIE Lu;LI Xiangjun;CUI Xiaohai;WANG Zihao;ZHAO Yan(China Jiliang University,Hangzhou 310018,China;National Institute of Metrology,Beijing 100029,China;CMEC Group Renewable Energy Development Co.,Ltd.,Beijing 100073,China)

机构地区：[1]中国计量大学,杭州310018 [2]中国计量科学研究院,北京100029 [3]国机中设新能源开发有限责任公司,北京100073

出　　处：《计量科学与技术》2024年第8期58-63,共6页Metrology Science and Technology

基　　金：国家质量基础设施体系(2021YFF0600304)。

摘　　要：热敏电阻型功率计采用直流替代的方法测量微波、毫米波功率,为了补偿环境温度变化对测量带来的影响,功率计通常具备测量电桥和补偿电桥,以双电桥模式进行测量。用微量热计型功率基准定标被校同轴热敏电阻型功率传感器时,不能因为环境温度稳定而单独使用测量电桥,为了保证定标结果的有效性,在基准定标中不仅需要对环境温度进行补偿,还需要对双元件误差导致的陶瓷芯温度变化进行补偿。实验表明,在18 GHz、10 mW电平定标时,分别使用单、双电桥功率计测得N型同轴热敏电阻功率传感器的替代功率偏差为0.38%。波导热敏电阻型功率传感器为单元件结构,定标其有效效率时不需要考虑单、双电桥测量问题。Thermistor-type power meters use DC substitution to measure microwave and millimeter wave power.To compensate for environmental temperature changes,these power meters typically employ both measurement and compensation bridges,operating in a dual-bridge mode.When calibrating a coaxial thermistor-type power sensor using a microcalorimeter power standard,the measurement bridge alone cannot be used,even with stable environmental temperatures.To ensure valid calibration results,both environmental temperature compensation and ceramic core temperature variation compensation(due to dual-element errors)are necessary.Experiments show that at 18 GHz and 10 mW power level,the substituted power deviation for an N-type coaxial thermistor power sensor is 0.38%when measured with single versus dual-bridge power meters.For waveguide thermistor-type power sensors with single-element structures,calibrating effective efficiency does not require consideration of single versus dual-bridge measurement issues.

关 键 词：计量学 双元件误差 热敏电阻型功率计 功率传感器 替代功率 测量电桥 补偿电桥 

分 类 号：TB973[一般工业技术—计量学]