METHOD AND SYSTEM FOR ITEM LEVEL UHF RFID TAG WITH LOW FREQUENCY POWER ASSIST
First Claim
1. A security tag comprising:
- a radio frequency identification (“
RFID”
) device;
a first antenna circuit coupled to the RFID device, the first antenna circuit adapted to decode interrogation signals from an RFID reader; and
a second antenna circuit coupled to the RFID device, the second antenna circuit adapted to induce energy from transmission signals received from at least an alternate power source.
4 Assignments
0 Petitions
Accused Products
Abstract
A method and system for increasing the read range of a security tag by supplying an additional antenna system to the tag in order to provide power to a radio frequency identification (“RFID”) chip without the need to rely solely on power from the RFID reader. The security tag includes an RFID chip and a first antenna circuit coupled to the RFID chip where the first antenna circuit is adapted to decode interrogation signals from an RFID reader. The security tag also includes a second antenna circuit coupled to the RFID chip. The second antenna circuit is adapted to induce power from signals received from at least an alternate power source, such as an EAS transmitter, so that the RFID chip can be powered up and activated during an RFID interrogation round.
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Citations
27 Claims
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1. A security tag comprising:
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a radio frequency identification (“
RFID”
) device;a first antenna circuit coupled to the RFID device, the first antenna circuit adapted to decode interrogation signals from an RFID reader; and a second antenna circuit coupled to the RFID device, the second antenna circuit adapted to induce energy from transmission signals received from at least an alternate power source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A combination radio frequency identification (“
- RFID”
)/electronic article surveillance (“
EAS”
) system, the system comprising;an RFID reader generating RFID interrogation signals; an EAS transmitter generating EAS interrogation signals; and a security tag arranged to receive the EAS and RFID interrogation signals and transmit a response signal, the security tag comprising; a radio frequency identification (“
RFID”
) device;a first antenna circuit coupled to the RFID device, the first antenna circuit adapted to decode interrogation signals from an RFID reader; and a second antenna circuit coupled to the RFID device, the second antenna circuit adapted to induce energy from signals received from at least the EAS transmitter. - View Dependent Claims (10, 11, 12, 13, 21, 22, 23)
- RFID”
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15-20. -20. (canceled)
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24. A method of powering a security tag, the security tag receiving
interrogation signals from a radio frequency identification (“ - RFID”
) device, the method comprising;receiving an RFID signal from the RFID device; receiving a transmission signal from an alternate device; and inducing energy from the received transmission signal, the induced energy allowing the security tag to be activated and participate in an RFID inventory round with the RFID device. - View Dependent Claims (25, 26, 27)
- RFID”
Specification