The LAAS Integrated Multipath Limiting Antenna (IMLA)

D. Bryce Thornberg, Dean S. Thornberg, Michael F. DiBenedetto, Michael S. Braasch, Frank van Graas, and Chris Bartone

Abstract:	The significant portion of the reduction of multipath in the LAAS ground system is accomplished by means of the Integrated Multipath Limiting Antenna (IMLA). Many years of analysis, design and development have been applied to the creation of a dual beam IMLA which provides the performance to meet the demanding requirements of accuracy, availability and integrity for the LAAS Ground Facility (LGF). Ground multipath rejection on the order of 35 to 40 dB is achieved with the IMLA throughout the entire satellite hemispherical coverage volume. Flight testing of LAAS systems utilizing the IMLA at both the FAA William J. Hughes Technical Center and Ohio University has shown that the IMLA rejects multipath to levels which have been demonstrated to allow full compliance to the LGF specifications.
Published in:	Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002) September 24 - 27, 2002 Oregon Convention Center Portland, OR
Pages:	2082 - 2092
Cite this article:	Updated citation: Published in NAVIGATION: Journal of the Institute of Navigation
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