Effects of Hand Phantom on Mobile Phone Antenna Performance

Chung-Huan Li, Erdem Ofli, Nicolas Chavannes, and Niels Kuster, in IEEE Transactions on Antenna and Propagation, Volume 57, Issue 9, pp. 2763–2770, September 2009.

The aim of this paper is to investigate the influence of the various parameters of the hand upon the OTA performance criteria to support the standardization process of the hand phantom and to provide the tools for optimization of handheld transmitters. The results reveal the following order of significance for small variations in hand parameters: 1) position of index finger; 2) distance between phone case and palm; 3) position of the other fingers; 4) size of the hand; 5) dielectric parameters; 6) wrist length and tilt. Some configurations may lead to a slight increase of the peak spatial SAR in the head. OTA assessment without the hand does not provide a good measure of phone performance in real life.

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