A Miniature Ultrawideband Electric Field Probe Based on Coax-Thru-Hole via Array for Near-Field Measurement

2017 ◽  
Vol 66 (10) ◽  
pp. 2762-2770 ◽  
Author(s):  
Zhaowen Yan ◽  
Jianwei Wang ◽  
Wei Zhang ◽  
Yansheng Wang ◽  
Jun Fan
Keyword(s):  
Electric Field ◽  
Field Measurement ◽  
Near Field ◽  
Electric Field Probe ◽  
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.

Estimation of current distribution by near-field measurement

2009 ◽  
Author(s):  
Qiang Chen ◽  
Jerdvisanop Chakarothai ◽  
Kunio Sawaya
Keyword(s):  
Current Distribution ◽  
Field Measurement ◽  
Near Field ◽  
Near Field Measurement

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

Atomic 2D electric field imaging of a Yagi–Uda antenna near-field using a portable Rydberg-atom probe and measurement instrument

2020 ◽  
Vol 9 (5) ◽  
pp. 305-312
Author(s):  
Ryan Cardman ◽  
Luís F. Gonçalves ◽  
Rachel E. Sapiro ◽  
Georg Raithel ◽  
David A. Anderson
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Field Measurement ◽  
Near Field ◽  
Measurement Instrument ◽  
Rydberg Atom ◽  
Field Measurements ◽  
Atom Probe ◽  
Electric Field Measurement ◽  
Measurement Uncertainties

AbstractWe present electric field measurements and imaging of a Yagi–Uda antenna near-field using a Rydberg atom–based radio frequency electric field measurement instrument. The instrument uses electromagnetically induced transparency with Rydberg states of cesium atoms in a room-temperature vapor and off-resonant RF-field–induced Rydberg-level shifts for optical SI-traceable measurements of RF electric fields over a wide amplitude and frequency range. The electric field along the antenna boresight is measured using the atomic probe at a spatial resolution of ${\lambda }_{RF}/2$ with electric field measurement uncertainties below 5.5%, an improvement to RF measurement uncertainties provided by existing antenna standards.

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