Anticipated Impact of Hand-Hold Position on the Electromagnetic Interaction of Different Antenna Types/Positions and a Human in Cellular Communications

[摘要] This paper is intended to investigate intensely the impact of multipossible hand-hold positionson the electromagnetic (EM) interaction of handset antennas and a human by using a finite-differencetime-domain (FDTD) method. Candy-bar handsets with different external and internalantenna positions operating in the GSM900, GSM1800/DCS, and UMTS/IMT-2000 bands arehereby simulated with configuration of the most parts in order to achieve the commerciallyavailable handset model design. Homogeneous and heterogeneous phantoms both are used tosimulate the human head, whereas, a semirealistic model with three different tissues is designedto simulate a human hand holding a set. Both of the antenna performance including the totalisotropic sensitivity (TIS) and the specific absorption rate (SAR) in tissues are examined for thedifferent suggested applicable cases, where various positions of antenna, handset and hand areconsidered in simulations.This simulation study determines that both of the antenna performance and the SAR in tissuessignificantly alter owing to the positioning of the handset against user's head at different handlevels; where a maximum alteration is observed due to the exposure of handset with internalantenna, as compared with the handset having external antenna.

[学科分类] 电子、光学、磁材料