Title:
非線形受動トランスポンダを使用する無線電磁式追跡システム
Document Type and Number:
Japanese Patent JP2007521755
Kind Code:
A
Abstract:
A wireless electromagnetic tracking system using a nonlinear passive transponder is provided. The transponder employs a coil connected in parallel with a diode. The transponder emits a response signal when an excitation signal is incident upon the coil of the transponder. Inclusion of the diode in the transponder circuit introduces nonlinear characteristics into the waveform of the response signal emitted by the transponder. The nonlinear characteristics can be varied by changing the capacitance level of the transponder circuit. The nonlinear characteristics of the response signal can be used to discern the response signal from the excitation signal when both signals are received at a receiver. The nonlinear characteristics can also be utilized in a system of encoding data that is to be transmitted from a transponder to a receiver.
Inventors:
Anderson, Peter Traneus
Application Number:
JP2006518765A
Publication Date:
August 02, 2007
Filing Date:
July 01, 2004
Export Citation:
Assignee:
GE Medical Systems Global Technology Company LLC
International Classes:
H04B1/59; G06K19/067; G06K19/07; G06K17/00
Domestic Patent References:
| JPH08202839A | 1996-08-09 | |||
| JPH11298368A | 1999-10-29 | |||
| JPS6467041A | 1989-03-13 | |||
| JP2000228637A | 2000-08-15 |
Attorney, Agent or Firm:
Kazuo Shamoto
Shinjiro Ono
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Yoshio Akimoto
Shinjiro Ono
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Yoshio Akimoto