Summary

International Symposium on Antennas and Propagation

2006

Session Number:3D2b

Session:

Number:3D2b-1

Effect of dual antenna transmission on mobile terminal specific absorption rate

P. Hui,  A. Toropainen,  R. Eliassi,  Y. Rahmat-Samii,  

pp.1-5

Publication Date:2006/11/2

Online ISSN:2188-5079

DOI:10.34385/proc.34.3D2b-1

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Summary:
Mobile transmit diversity (MTD) is one of the techniques used to enhance the up-link speed and system capacity of cellular mobile communication systems. A simple MTD scheme comprises of two transmit antennas whose feeds have a tunable phase difference. A study on how this phase difference affects the localized volume-averaged Specific Absorption Rate (SAR) is carried out. SAR variations as much as 4.8 dB and 3.0 dB are observed in 900 MHz and 1800 MHz bands, respectively. At the 900 MHz band, the peak SAR of a mobile terminal with dual transmit antennas can be larger than SAR of a mobile terminal with a single transmit antenna. This fact should be considered in future development of standardized protocols for SAR evaluation of mobile terminals.