Title :
Novel antennas for personal communications including biological effects
Author :
Rahmat-Samii, Y.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
The electromagnetic interaction between handset-mounted antennas and the nearby biological tissue is a key consideration in modern personal communications. A thorough investigation of this antenna-tissue interaction using the finite-difference time-domain (FDTD) electromagnetic simulation approach is presented using detailed models of real-life antennas on a transceiver handset. Representative examples of external and internal antenna configurations are considered. Detailed models of the human head and hand are implemented to investigate the effects of the tissue location and physical model on the antenna performance. The specific absorption rate (SAR) in the tissue is examined for several different antenna/handset configurations. It is found that for a head and handset antenna separation of 2 cm, the SAR in the head has a peak value between 0.9 and 3.8 mW/g and an average value between 0.06 and 0.10 mW/g for 1 W of power delivered to the antenna. Additionally, the head and hand could absorb between 48 and 68% of the power delivered to the antenna
Keywords :
biological effects of fields; digital simulation; finite difference time-domain analysis; mobile antennas; personal communication networks; simulation; telephone sets; telephony; transceivers; 1 W; 2 cm; FDTD EM simulation; antenna performance; antenna-tissue interaction; antenna/handset configurations; average SAR value; biological effects; biological tissue; electromagnetic interaction; electromagnetic simulation; external antenna configurations; finite-difference time-domain; handset mounted antennas; head-handset antenna separation; human hand; human head; internal antenna configurations; peak SAR value; personal communications; physical model; specific absorption rate; tissue location; transceiver handset; Biological system modeling; Biological tissues; Computational modeling; Finite difference methods; Humans; Propagation losses; Specific absorption rate; Telephone sets; Time domain analysis; Transceivers;
Conference_Titel :
Microwave and Optoelectronics Conference, 1995. Proceedings., 1995 SBMO/IEEE MTT-S International
Conference_Location :
Rio de Janeiro
Print_ISBN :
0-7803-2674-1
DOI :
10.1109/SBMOMO.1995.509637
