A Novel GPS Survey Antenna

Waldemar Kunysz

Abstract:	A novel GPS antenna for surveying applications is proposed. It is a fixed beam phased array of aperture-coupled slots optimized to receive a right hand polarized signal. The proposed antenna is made out of a single PCB board. Another PCB board is placed underneath the antenna to act as a reflector in order to reinforce the antenna directivity and reduce the back-lobe radiation. The radiation pattern roll-off of this antenna is sharper than the conventional GPS patch antennas mounted in the “choke ring” configuration. The sharp pattern roll-off allows reducing the antenna’s susceptibility to multipath generated replicas of the GPS signal. The antenna is much smaller and lighter than a corresponding typical “choke ring” antenna. There is no phase center offset between the L1 and L2 GPS frequencies and the antenna does not require any alignment with respect to a given direction (such as North) due to its natural symmetry. Due to its planar structure it can be easily buried in the vehicle or aircraft skin.
Published in:	Proceedings of the 2000 National Technical Meeting of The Institute of Navigation January 26 - 28, 2000 Pacific Hotel Disneyland Anaheim, CA
Pages:	698 - 705
Cite this article:	Kunysz, Waldemar, "A Novel GPS Survey Antenna," Proceedings of the 2000 National Technical Meeting of The Institute of Navigation, Anaheim, CA, January 2000, pp. 698-705.
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