The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 11, 2007
Filed:
Nov. 10, 2005
Hans Gregory Schantz, Huntsville, AL (US);
Robert Edward Depierre, Huntsville, AL (US);
Glenn Wolenec, Madison, AL (US);
Kazimierz Siwiak, Coral Springs, FL (US);
Jerome Sylvester Gabig, Brownsboro, AL (US);
Hans Gregory Schantz, Huntsville, AL (US);
Robert Edward DePierre, Huntsville, AL (US);
Glenn Wolenec, Madison, AL (US);
Kazimierz Siwiak, Coral Springs, FL (US);
Jerome Sylvester Gabig, Brownsboro, AL (US);
Q-Track Corporation, Huntsville, AL (US);
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.