Commitment to Design for a Safety-Critical Function Reliable GPS Antenna Technology for E-911 in Handsets

O.P. Leisten, A.P. Wingfield

Abstract:	This paper analyses the difficulties that complicate the design of high-sensitivity antenna devices in the handset platform as required for US E-911 and European E-112 emergency location requirements. It argues for a dielectrically-loaded quadrifilar-helix antenna solution to the problem and then characterises the advantage by comparing the results of a conventional whip antenna and the quadrifilar-helix mounted on a commercially available A-GPS handset. The quadrifilar-helix solution provided a particularly significant gain improvement (of approx 15dB-5dB) for hand-loaded in-use conditions.
Published in:	Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003) September 9 - 12, 2003 Oregon Convention Center Portland, OR
Pages:	1579 - 1584
Cite this article:	Leisten, O.P., Wingfield, A.P., "Commitment to Design for a Safety-Critical Function Reliable GPS Antenna Technology for E-911 in Handsets," Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003), Portland, OR, September 2003, pp. 1579-1584.
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