Near field electromagnetic calibration system

Details Near field electromagnetic calibration system Near field electromagnetic calibration system

2009-09-21

2010-12-28

Lobo, Ian J (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Testing or calibrating of radar system

By monitoring

C342S165000

Reexamination Certificate

active

07859452

ABSTRACT:
A calibration system for a position determination system, the calibration system includes, in one embodiment, a calibration transmitter producing a calibration signal, a plurality of calibration receivers for receiving the calibration signal, each of the calibration receivers of the plurality of calibration receivers having a respective known calibration receiver position, and each of the calibration receivers of the plurality of calibration receivers including means for receiving a first signal characteristic of said calibration signal, means for receiving a second signal characteristic of said calibration signal, and a comparison unit for comparing said first signal characteristic and said second signal characteristic of said calibration signal to generate a calibration comparison result. In various embodiments, signal comparisons may be differences between electric and magnetic field phase or may utilize signal amplitude differences. A system utilizing a receiver and multiple transmitter locations is disclosed. Position may be determined using existing wiring.

REFERENCES:
patent: 5809063 (1998-09-01), Ashe et al.
patent: 6084551 (2000-07-01), Aslan
patent: 6163296 (2000-12-01), Lier et al.
patent: 6249680 (2001-06-01), Wax et al.
patent: 6691074 (2004-02-01), Moriya et al.
patent: 6963301 (2005-11-01), Schantz et al.

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