Title: High-sensitivity optically modulated scatterer for electromagnetic-field measurement
Authors: Lao, Ray-Rong
Liang, Wen-Lie
Shay, Wen-Tron
Thompson, Richard P.
Dudley, Richard A.
Merckel, Olivier
Ribiere-Tharaud, Nicolas
Bolomey, Jean-Charles
Tarng, Jenn-Hwan
Institute of Communications Engineering
Keywords: optically modulated scatterer (OMS);radiated field;specific absorption rate (SAR)
Issue Date: 1-Apr-2007
Abstract: The optically modulated-scatterer (OMS) technique is developed for electromagnetic-field-distribution measurement with minimum disturbance to the field under test. In this paper, an OMS with newly designed photoconductive-switching structure is proposed. The performances of the new OMS are evaluated with a monostatic-field-measurement system. Measurement results show that an improvement of 6 to 8 dB in sensitivity is achieved compared to previous OMS devices. The developed OMS was used in an electromagnetic-field-distribution mapping system to measure the field distribution in a cubic phantom radiated by a mobile phone. The results show the suitability of this OMS for specific-absorption-rate measurement application.
URI: http://dx.doi.org/10.1109/TIM.2007.890627
ISSN: 0018-9456
DOI: 10.1109/TIM.2007.890627
Volume: 56
Issue: 2
Begin Page: 486
End Page: 490
Appears in Collections:Conferences Paper

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