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| 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 |
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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.
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Received: 17 February 2020
Published: 20 August 2021
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［1］国家质量监督检验检疫总局.GB/T 6113.104—2016,无线电骚扰和抗扰度测量设备的测量方法规范第1~4部分:无线电骚扰和抗扰度测量设备 辐射骚扰测量用天线和试验场地［S］.2016.
［2］International Special Committee on Radio Interference.CISPR 16-1-6: 2017 Specification for radio disturbance and immunity measuring apparatus and methods-Part 1-6: Radio disturbance and immunity measuring apparatus-EMC antenna calibration［S］.2017.
［3］Ishll M, Hirose M,Komiyama K. A measurement method for magnetic antenna factor of small circular loop antenna by 3-antenna method［C］//URSI North American Radio Science Meeting. Columbus, Ohio, 2003: 458.
［4］Arthur D C, Ji Y, Daly M P J. A simplified method for the measurement of magnetic loop antenna factor［C］//IEEE. Conference on Precision Electromagnetic Measurements Digest. 2009.
［5］Qin Y,Wu Y L,Miao J Y,et al. A current probe calibration method for the application of loop antenna calibration［C］//International Symposium on Antennas and Propagation (ISAP). 2019.
［6］蒋廷勇,燕有杰,刘小龙,等.短电磁脉冲标准场装置实验室比对［J］.计量学报,2019, 40 (6): 1107-1111.
Jiang T Y, Yan Y J, Liu X L,et al. Inter-laboratory Comparisons of Standard Facilities for Short Pulse E-field［J］.Acta Metrologica Sinica, 2019, 40 (6): 1107-1111.
［7］国家质量技术监督局.JJF 1059—1999 测量不确定度评定与表示［S］.1999.
［8］Spiegel R J, Joines W T, Blackman C F, et al.A Method for Calculating Electric And Magnetic Fields in TEM Cells at ELF［J］.IEEE Transactions on Electromagnetic Compatibility, 1987, 29(4):265-272.
［9］刘潇,李渤,谢鸣.基于TEM小室的探头校准系统不确定度评定［J］.计量学报, 2015, 36(3): 318-323.
Liu X, Li B, Xie M. The Uncertainty Estimation for the Probe Calibration Results Employing a TEM Cell ［J］. Acta Metrologica Sinica, 2015, 36(3):318-323. |
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2021, Vol. 42 
