A New Approach to Cellphone GPS Antennas

T. Haddrell, M. Phocas, N. Ricquier

Abstract:	GPS is becoming a “must have” feature in mobile phones, with the major manufacturers launching new designs regularly and second tier manufacturers rapidly catching up. A quick test of any early GPS equipped phone shows that although the incumbent GPS chip (or chipset) is of high sensitivity, the integrated end result is not able to perform in low signal conditions. A number of challenges facing the phone designer are responsible for this, the main two being the antenna performance and interference in the GPS band generated within the phone platform itself. The paper explores the role of the antenna in determining the overall performance of the GPS function, and the potential for avoiding some of the platform jamming signals by choice of antenna technology. We present some results from an ongoing study within NXP, as part of our remit to assist customers at the system integration level in support of GPS chip sales.
Published in:	Proceedings of the 21st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2008) September 16 - 19, 2008 Savannah International Convention Center Savannah, GA
Pages:	2747 - 2754
Cite this article:	Haddrell, T., Phocas, M., Ricquier, N., "A New Approach to Cellphone GPS Antennas," Proceedings of the 21st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2008), Savannah, GA, September 2008, pp. 2747-2754.
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