Integrated GPS/GLONASS Antenna for High Performance Applications

Martin Maurer, Taymoor Hekmat and Norbert Niklasch

Abstract:	The combined utilization of both the GPS and GLONASS systems is of particular interest for improving the availability, accuracy and reliability of satellite positioning data, especially in certain civil applications that require high levels of precision and integrity. On the other hand, high-precision applications such as integrity monitoring or differential reference systems require antennas with a high level of multipath rejection and a high degree of phase uniformity, while covering the upper hemisphere with a smooth gain pattern and with minimum axial ratio. In this paper, we shall present an antenna system which has been developed to satisfy the above stated requirements in the frequency band of both the GPS Ll/L2 and GLONASS Ll/L2 systems. The antenna element is built up as a superstrate loaded stacked microstrip configuration flu&mounted on a corrugated ground-plane. Performance optimization with emphasis on multipath rejection has been carried out and will be presented here. Some special techniques for improving the radiation pattern and AR level have been incorporated and are described. Design considerations covering broadbanding the AR, input reflection coefficient, and antenna gain properties are also discussed.
Published in:	Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995) September 12 - 15, 1995 Palm Springs, CA
Pages:	845 - 851
Cite this article:	Maurer, Martin, Hekmat, Taymoor, Niklasch, Norbert, "Integrated GPS/GLONASS Antenna for High Performance Applications," Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995), Palm Springs, CA, September 1995, pp. 845-851.
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