Interaction Between GSM Handset Helical Antenna and User's Head: Theoretical Analysis and Experimental Results

A. Alexiou, P. Kostarakis (), V. N. Christofilakis, T. Zervos, A. A. Alexandridis (), K. Dangakis, C. Soras (), V. V. Petrović (), B. M. Kolundžija and A. R. Dordević
Additional contact information
A. Alexiou: University of Ioannina
P. Kostarakis: University of Ioannina
V. N. Christofilakis: University of Ioannina
T. Zervos: Institute of Informatics and Telecommunications
A. A. Alexandridis: Institute of Informatics and Telecommunications
K. Dangakis: Institute of Informatics and Telecommunications
C. Soras: University of Patras
V. V. Petrović: University of Belgrade
B. M. Kolundžija: University of Belgrade
A. R. Dordević: University of Belgrade

Environment Systems and Decisions, 2005, vol. 25, issue 2, 215-221

Abstract: Summary The performance of a cellular phone commercial helical antenna at 900~MHz band, both in free space and in the presence of a human head phantom was studied. Numerical simulation of the phone model for the latter case has been performed giving 3D radiation diagrams. The effect of the phantom head on radiation diagrams is presented. The relative amount of the EM power absorbed in the head was obtained for several distances of the phone. Measurements were carried out in a RF anechoic chamber using standard horn antennas and a calibrated measuring system. Absolute radiation patterns of the antenna gain were obtained in the three principal planes. Significant reduction of the absorbed power could be achieved just by moving the phone 1 cm away from the head.

Keywords: helical antenna; GSM handset; phantom head; interaction; anechoic chamber; WIPL-D; radiation pattern; gain patterns; absorbed power (search for similar items in EconPapers)
Date: 2005
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DOI: 10.1007/s10669-005-4286-6

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