scholarly journals A two‐turn loop active magnetic field probe design for high sensitivity near‐field measurement

2021 ◽  
Author(s):  
Weiheng Shao ◽  
Jianke Li ◽  
Quan Huang ◽  
E Shao ◽  
Jiesheng Liu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Measurement ◽  
Near Field ◽  
High Sensitivity ◽  
Probe Design ◽  
Near Field Measurement

A Miniature High-Sensitivity Active Electric Field Probe for Near-Field Measurement

2019 ◽  
Vol 18 (12) ◽  
pp. 2552-2556 ◽  
Author(s):  
Zheng Min ◽  
Zhaowen Yan ◽  
Wei Liu ◽  
Jianwei Wang ◽  
Donglin Su ◽  
...  
Keyword(s):  
Electric Field ◽  
Field Measurement ◽  
Near Field ◽  
High Sensitivity ◽  
Electric Field Probe ◽  
Near Field Measurement

scholarly journals A near-field measurement based method for predicting field emissions below 30 MHz in a CISPR-25 test set-up

2016 ◽  
Vol 14 ◽  
pp. 147-154
Author(s):  
Zongyi Chen ◽  
Stephan Frei
Keyword(s):  
Electric Field ◽  
Field Measurement ◽  
Near Field ◽  
Ground Plane ◽  
High Sensitivity ◽  
Field Measurements ◽  
Alternative Methods ◽  
Antenna Measurement ◽  
Cispr 25 ◽  
Near Field Measurement

Abstract. Automotive electric components are required to pass radiated emission tests. According to CISPR-25 standard (ALSE method), an expensive anechoic chamber is needed for conducting the field emission testing. Reproducibility due to high sensitivity to chamber and setup details is poor. Alternative methods, which perform measurements without using a chamber are preferred. This paper provides an alternative pre-compliance method for predicting the fields of CISPR-25 results for frequencies below 30 MHz, based mainly on electric near-field measurements. The motivation is that common-mode current measurements or magnetic near-field measurement based methods give good field prediction above 30 MHz, but fail below 30 MHz. The proposed method applies Huygens' Principle for field prediction. The electric field distribution for the defined Huygens' surface and the equivalent currents are estimated from a small number of field measurements close to the ground plane. It is shown that the electric field can be well predicted, compared with a full-wave simulation the deviation is within 4 dB, compared with a standard antenna measurement up to 3 MHz the deviation is less than 1 dB.

Systematic Characterization of Dual Probes for Electromagnetic Near-field Measurement

2020 ◽  
pp. 1-1
Author(s):  
Weiheng Shao ◽  
Xinxin Tian ◽  
Rongquan Chen ◽  
Xiao He ◽  
Wenxiao Fang ◽  
...  
Keyword(s):  
Field Measurement ◽  
Near Field ◽  
Near Field Measurement
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