The probe used in the conventional SAR measurement is usually calibrated in a well filled with tissue-equivalent liquid surrounded by a rectangular waveguide and a matching dielectric window in the frequency range from 800 MHz to 3 GHz. However, below 800 MHz, the waveguides are too large to be used for the calibration. Therefore, we have developed another technique of calibrating the SAR-probe, that is, relating the output voltage of the probe to the field intensity produced by a reference antenna in the tissue-equivalent liquid by using two-antenna method. In this paper, the calibration system using the reference dipole antennas in the liquid at 450 MHz, 900 MHz and 2450 MHz is presented and far-field gain of the reference antenna and calibration factor of the SAR-probe are measured and compared with those obtained by using the conventional waveguide system.
雑誌名
IEICE transactions on communications
巻
E95-B
号
1
ページ
60 - 68
発行年
2012-03
出版者
The Institute of Electronics, Information and Communication Engineers
SAR-Probe Calibration System Using Reference Dipole Antenna in Tissue-Equivalent Liquid
e95-b_1_60.pdf
(1.93MB)
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