The Loop Antenna Calibration System Using the TEM Method and the Uncertainty Estimation for the Measurement Results
LIU Xiao1,WU Yan-li2,QIN Yao2,MENG Dong-Lin1,HUANG Pan1
1. National Institute of Metrology, Beijing, 100029, China
2. College of Information Science and Technology,Henan University of Technology, Zhengzhou, Henan 450000, China
Abstract：The transverse electromagnetic (TEM) cell method is widely used in the loop antenna calibrations. The system dynamic range requirement for the active loop and the passive loop are different due to the magnetic antenna factor difference. Two new loop antenna calibration systems based on the TEM cell as the standard field generator have been proposed considering the magnetic field antenna factor difference for active and passive loop respectively, which enable the sweep-frequency measurement. The calibration methods are discussed,the measured magnetic field antenna factors are presented, and the uncertainties are evaluated for the active loop and the passive loop of no more than 60cm diameter which is normally used in the electromagnetic compatibility (EMC) field, respectively. The sweep-frequency measurements covering from 9kHz to 30MHz for the commonly used loop antennas can solve the problem due to the big dynamic range, and also enhance the calibration efficiency.
刘潇,吴艳丽,秦瑶,孟东林,黄攀. TEM室法环天线校准系统建立及测量结果不确定度评定[J]. 计量学报, 2021, 42(8): 1061-1067.
LIU Xiao,WU Yan-li,QIN Yao,MENG Dong-Lin,HUANG Pan. The Loop Antenna Calibration System Using the TEM Method and the Uncertainty Estimation for the Measurement Results. Acta Metrologica Sinica, 2021, 42(8): 1061-1067.
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2021, Vol. 42 
