Title :
Mass-averaged SAR measurement in the SAR estimation system using flat-plane solid phantom
Author :
Iyama, Taakahiro ; Onishi, Teruo ; Uebayashi, Shinji ; Nojima, Toshio
Author_Institution :
NTT DoCoMo, Inc., Kanagawa, Japan
Abstract :
A specific absorption rate (SAR) estimation system, using a flat-plane solid phantom that provides stable dielectric properties and easy handling of the phantom, is presented. The SAR distribution measured using the solid phantom agrees well with that measured using a liquid phantom, Which is recommended by the International Electrotechnical Commission (IEC), for a standard dipole antenna at 1950 MHz. Calculated mass-averaged SARs, based on the distribution using the solid phantom, have a difference of +2.1% for 10 g and -6.8% for 1 g, respectively, compared to the reference values by IEC. Those results can be improved with a smaller step size of scanning. In addition, in order to decrease the measuring time, the use of two probes is investigated, As a result, the averaged SAR can be obtained with a difference of within 10% with the distance between the two probes of 20 mm.
Keywords :
dielectric properties; dipole antennas; electromagnetic wave absorption; phantoms; 1 g; 10 g; 1950 MHz; 20 mm; SAR distribution; SAR estimation system; dipole antenna; dual probe measurement system; flat-plane solid phantom; mass-averaged SAR calculation; mass-averaged SAR measurement; phantom dielectric properties; scanning step size; specific absorption rate; Antenna measurements; Dielectric measurements; Dipole antennas; IEC standards; Imaging phantoms; Measurement standards; Probes; Solids; Specific absorption rate; Time measurement;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2004. IEEE
Print_ISBN :
0-7803-8302-8
DOI :
10.1109/APS.2004.1330124
