Title :
Investigations of reduced SAR personal communications handset using FDTD
Author :
Moustafa, J. ; Abd-Alhameed, R.A. ; Vaul, J.A. ; Excell, P.S. ; McEwen, N.J.
Author_Institution :
Telecommun. Res. Centre, Bradford Univ., UK
Abstract :
A two-element phased antenna array for a mobile handset is investigated using the finite difference time domain (FDTD) method. The array is designed to provide a spatial null in the near field zone in the direction of the human head. The optimisation algorithm to obtain the minimum peak specific absorption rate (SAR) is addressed. The dynamic range of the feeding voltages in relation to the reduction in SAR is discussed. The overall efficiency and azimuth coverage are improved and the peak specific absorption rate in the head can be reduced by at least 8 dB. The results are compared with those from a normal single element handset
Keywords :
antenna phased arrays; antenna radiation patterns; biological effects of radiation; electromagnetic wave absorption; finite difference time-domain analysis; health hazards; mobile antennas; personal communication networks; telephone sets; FDTD; antenna efficiency; azimuth coverage; dynamic range; feeding voltage; finite difference time domain method; human head; minimum peak specific absorption rate; mobile handset; near field zone; optimisation algorithm; reduced SAR personal communications handset; single element handset; spatial; two-element phased antenna array;
Conference_Titel :
Antennas and Propagation, 2001. Eleventh International Conference on (IEE Conf. Publ. No. 480)
Conference_Location :
Manchester
Print_ISBN :
0-85296-733-0
DOI :
10.1049/cp:20010227
