Mode-diversity RFAID tag and interrogator system and method...

Details Mode-diversity RFAID tag and interrogator system and method... Mode-diversity RFAID tag and interrogator system and method...

2007-08-21

2007-08-21

Trieu, Van T. (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S572100, C340S573100

Reexamination Certificate

active

11142054

ABSTRACT:
Methods and apparatus are provided for mode diversity radio frequency identification (RFAID). The apparatus comprises a first transducer configured to receive a first radio frequency (RF) signal, a second transducer configured to receive an acoustic signal, and an impedance modulator coupled to the first transducer and the second transducer and configured to emit a signal identifying an RFAID tag when the first transducer receives the first RF signal and/or the second transducer receives the acoustic signal. The method comprises transmitting an RF signal and an acoustic frequency signal, and detecting a first modulated signal indicating an RFAID transponder. The first modulated signal is based on one of the RF signal and the acoustic signal.

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International Search Report for International Application No. PCT/US2006/020881, mailed Oct. 10, 2006.

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