Structured Design of H-field Antennae for Low Frequency GNSS Augmentation Systems

Wouter J. Pelgrum

Abstract:	Loran-C and Eurofix are powerful systems to mitigate GPS and WAAS availability issues in urban and mountainous environments as well in polar regions. Loran-C H-field antennae show much better performance than E-field antennae in overcoming the problems formed by precipitation static and signal attenuation in city canyons. However designing H-field antennae is more complex than that of the commonly used E-field antennae, and compromises must be made to optimally meet application specific requirements. The paper first describes the basic concept of an H-field antenna and its associated preamplifier. The relations between antenna size and form, bandwidth, preamplifier noise and equivalent noise field-strength levels are outlined. Orthogonal relations between various circuit parameters have been established. This enables a structured design process of well-described non-iterative steps from specifications to an optimal design.
Published in:	Proceedings of the 14th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2001) September 11 - 14, 2001 Salt Palace Convention Center Salt Lake City, UT
Pages:	1933 - 1941
Cite this article:	Pelgrum, Wouter J., "Structured Design of H-field Antennae for Low Frequency GNSS Augmentation Systems," Proceedings of the 14th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2001), Salt Lake City, UT, September 2001, pp. 1933-1941.
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