Semi-passive radio frequency identification (RFID) tag with...

Details Semi-passive radio frequency identification (RFID) tag with... Semi-passive radio frequency identification (RFID) tag with...

2004-05-04

2008-03-25

Hofsass, Jeffery (Department: 2612)

Communications: electrical

Selective

Interrogation response

C340S010100, C340S010300, C340S572100, C340S572200

Reexamination Certificate

active

07348875

ABSTRACT:
A radio frequency beacon device for use with a backscatter interrogator includes a processor; a receiver coupled to the processor; a backscatter modulator coupled to the processor; and an active transmitter coupled to the processor, the active transmitter being configured to transmit an RF signal, in response to a trigger signal, regardless of whether the interrogator is providing a carrier wave for backscatter modulation by the backscatter modulator. Other methods and apparatus are provided.

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