Communications: radio wave antennas – Antennas – Body-attached or connected
Reexamination Certificate
2007-12-11
2007-12-11
Owens, Douglas W. (Department: 2821)
Communications: radio wave antennas
Antennas
Body-attached or connected
C455S041100
Reexamination Certificate
active
11272533
ABSTRACT:
Near field signal 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.
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DePierre Robert Edward
Gabig Jerome Sylvester
Schantz Hans Gregory
Siwiak Kazimierz
Wolenec Glenn
Owens Douglas W.
Q-Track Corporation
Richards James
Vu Jimmy
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