Coil pair with carrier suppression

Details Coil pair with carrier suppression Coil pair with carrier suppression

2011-04-12

2011-04-12

Anderson, Matthew D (Department: 2618)

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

C455S202000, C455S296000, C343S741000, C343S866000, C343S895000

Reexamination Certificate

active

07925223

ABSTRACT:
A coil pair having a transmission coil and a reception coil. The transmission coil is configured to transmit a transmission signal having a carrier. The reception coil is configured to receive from a source a reception signal having the carrier and data, and to significantly suppress the carrier while maintaining coupling with the source at any position along and any position proximate to the reception coil.

REFERENCES:
patent: 4922261 (1990-05-01), O'Farrell
patent: 5072222 (1991-12-01), Fockens et al.
patent: 6137447 (2000-10-01), Saitoh et al.
patent: 6584301 (2003-06-01), Bohn et al.
patent: 6960984 (2005-11-01), Vicci et al.
patent: 2006/0192007 (2006-08-01), Ide
Final Committee Draft, ISO/IEC 14443-1, Identification Cards—Contactless integrated circuit(s) cards—Proximity cards, Part I: Physical Characteristics, pp. 1-4, Annex A-B, 1997.
Final Committee Draft, ISO/IEC 14443-2, Identification cards—Contactless integrated circuit(s) cards—Proximity cards—Part 2: Radio frequency power and signal interface, pp. 5-15, Annex A, 1999.
Final Committee Draft, ISO/IEC 14443-3, Identification cards—Contactless integrated circuit(s) cards—Proximity cards—Part 3: Initialization and anticollision, pp. 1-38, Annex C, pp. 1-5, 1999.
Final Committee Draft, ISO/IEC 14443-4, Identification cards—Contactless integrated circuit(s) cards—Proximity cards—Part 4: Transmission protocol, pp. 1-33, 2000.
Final Committee Draft, ISO/IEC 10373-6, Identification cards—Test methods—Part 6: Proximity cards, pp. 1-19, Annex D-F, 2000.

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