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Patent Searching and Data


Title:
NEAR FIELD LOCATION SYSTEM AND METHOD
Document Type and Number:
WIPO Patent Application WO2006080983
Kind Code:
A3
Abstract:
Near field properties are used to determine a location by utilizing two magnetic antennas arranged so that the null axes are perpendicular and lie in a plane of interest, such as the horizontal plane. The two antennas may be used as transmitting antennas or receiving antennas. The antennas may be driven so as to produce an equivalent of an omnidirectional pattern in the plane of interest by driving the antennas in an orthogonal manner. The orthogonal drive may be time orthogonal or phase orthogonal. A location is determined based on near field response which may include propagation properties, which may include amplitude, phase, relative amplitude, or phase, or other properties. In one embodiment, multiple transmitters are utilized to determine the location of a single receiver. In another embodiment, multiple receivers are utilized to determine the location of a single transmitter. A space efficient magnetic antenna is disclosed.

Inventors:
SCHANTZ HANS GREGORY (US)
DEPIERRE ROBERT E (US)
WOLENEC GLENN W (US)
SIWIAK KAZIMIERZ (US)
GABIG JEROME SYLVESTER (US)
Application Number:
US2005044318W
Publication Date:
December 14, 2006
Filing Date:
December 08, 2005
Export Citation:
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Assignee:
TRACK INC Q (US)
SCHANTZ HANS GREGORY (US)
DEPIERRE ROBERT E (US)
WOLENEC GLENN W (US)
SIWIAK KAZIMIERZ (US)
GABIG JEROME SYLVESTER (US)
International Classes:
G01S19/25; H01Q1/36; G01S5/14; G01S5/02
Foreign References:
US6215456B12001-04-10
US5982330A1999-11-09
Other References:
See also references of EP 1829155A4
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