Selective de-activation of RFIDs
First Claim
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1. Apparatus, comprising:
- a) an antenna;
b) an integrated circuit connected with the antenna, which i) stores data in memory, and ii) transmits stored data to the antenna, when a predetermined signal is received on the antenna; and
c) de-activation means for changing radiation pattern of the antenna.
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Abstract
An approach to disabling an RFID. The operative range of an RFID is determined in part by the matching between the wavelength of the radiation used to communicate, and the length of the antenna used. Under the invention, the length of the antenna is changed, to reduce the operative range.
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Citations
14 Claims
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1. Apparatus, comprising:
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a) an antenna;
b) an integrated circuit connected with the antenna, which i) stores data in memory, and ii) transmits stored data to the antenna, when a predetermined signal is received on the antenna; and
c) de-activation means for changing radiation pattern of the antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method, comprising:
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a) receiving a device, smaller than credit card size, which i) contains a radio transceiver, a radio antenna, and memory, and ii) transmits data contained in memory in response to a predetermined signal received on the antenna; and
b) altering radiation pattern of the antenna, to thereby inhibit the response of paragraph (a)(ii). - View Dependent Claims (9, 10, 11, 12)
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13. Apparatus, comprising:
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a) a Radio Frequency Identification Device, RFID, which transmits data stored therein in response to a first type of incoming command signal; and
b) means for altering physical structure of the RFID, to thereby inhibit transmission of stored data in response to some of said first type of incoming command signals. - View Dependent Claims (14)
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Specification