Journal of South China University of Technology (Natural Science Edition) ›› 2021, Vol. 49 ›› Issue (6): 131-140.doi: 10.12141/j.issn.1000-565X.200312

Special Issue: 2021年电子、通信与自动控制

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Design of Ultra-Wideband Active Magnetic Field Probe for Near-Field Measurement

CHEN Zhijian1 WANG Yuchen1 HUANG Pengcheng1 SHAO Weiheng2 YE Changqing1 FANG Wenxiao2 HUANG Yun2#br#   

  1. 1. School of Electronic and Information Engineering, South China University of Technology,Guangzhou 510640，Guangdong，
    China; 2. Electronic Produce Reliability and Environmental Testing Research Institute, The Fifth Institute of Ministry of Industry and Information Technology, Guangzhou 510610, Guangdong, China
  • Received:2020-06-11 Revised:2020-12-07 Online:2021-06-25 Published:2021-06-01
  • Contact: 邵伟恒（1989-），男，工程师，主要从事集成电路的电磁兼容性研究。 E-mail:shaoweiheng@126.com
  • About author:陈志坚（1979-），男，高级工程师，主要从事模拟射频集成电路前端研究。E-mail:chenzhijian@scut.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China（62001123），the Key Realm Research & Development Program of Guangdong Province（2020B010179002，2018B010142001）and the Natural Science Foundation of Guangdong Province（2018A030310360）

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Abstract: The current active probe, whose detection frequency is mainly concentrated in the low frequency band, cant meet the detection requirements of the high frequency band. Therefore, a small, high-bandwidth, non-contact active magnetic field probe was proposed. The active magnetic field probe is made of a multilayer printed circuit board (PCB). An active amplifier module and its supporting power management chip were added to the passive probe to improve the transmission gain of the ultra-wideband type probe. The probe was tested and analyzed from four aspects: frequency response, spatial resolution, calibration factor, and differential electric field suppression capability. The results show that the designed probe has a transmission gain of -20dB, a spatial resolution of 900μm, and is of good differential electric field suppression. The probe can be used for ultra-wideband PCB board and more complex integrated circuit measurements.

Key words: active magnetic field probe, ultra-wideband, transmission gain, frequency response, spatial resolution, calibration factor, differential electric field suppression capability

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