RFID tag having multiple transceivers
First Claim
1. An RFID tag comprising:
- a first transceiver arranged to transmit and receive first radio frequency signals to and from a first reader; and
,a second transceiver arranged to transmit and receive second radio frequency signals to and from a second reader.
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Accused Products
Abstract
Information is communicated between an RFID tag and first and second readers. A first transceiver of the RFID tag is controlled so that the first transceiver communicates with the first reader and so that the first transceiver has substantially longer periods during which the first transceiver is not in communication with the first reader than when the first transceiver is in communication with the first reader. A second transceiver of the RFID tag is controlled so that the second transceiver communicates with the second reader at least during the periods when the first transceiver is not in communication with the first reader. The RFID tag may also have a battery, a switch coupling the battery to at least the first transceiver, and a controller that operates the switch in a duty cycle such that power is provided by the battery to the first transceiver during ON times of the duty cycle and such that power from the battery to the first transceiver is interrupted during OFF times of the duty cycle.
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Citations
35 Claims
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1. An RFID tag comprising:
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a first transceiver arranged to transmit and receive first radio frequency signals to and from a first reader; and
,a second transceiver arranged to transmit and receive second radio frequency signals to and from a second reader. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An RFID tag comprising:
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a transceiver arranged to transmit and receive first radio frequency signals to and from a first reader; and
,a receiver arranged to receive second radio frequency signals from a second reader and to activate the transceiver in response to the second signals. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 28, 29)
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25. An RFID tag comprising:
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a transceiver arranged to transmit and receive first radio frequency signals to and from a first reader; and
,a receiver arranged to receive second radio frequency signals from a second reader and to activate the transceiver in response to the second signals wherein the receiver is incapable of receiving the first signals. - View Dependent Claims (26, 27, 30, 31, 32, 33, 34, 35)
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Specification