Dynamic antenna tuning circuit for a radio frequency...

Details Dynamic antenna tuning circuit for a radio frequency... Dynamic antenna tuning circuit for a radio frequency...

2011-05-03

2011-05-03

Pope, Daryl (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S010100, C340S505000, C340S539100, C340S572100, C340S572800

Reexamination Certificate

active

07936272

ABSTRACT:
A resonant antenna circuit for a radio frequency identification (RFID) reader generates an electrical signal for activating a passive identification tag. The identification tag in turn generates a coded electrical signal that is detected by the reader. The electrical characteristics of the resonant circuit are actively and dynamically altered so that the antenna performs more optimally during the transmit and receive intervals.

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