RFID device with changeable characteristics
First Claim
1. A radio frequency identification (RFID) device comprising:
- a transponder chip; and
an antenna coupled to the chip;
wherein coupling between the chip and at least part of the antenna is physically separable along a line of the device; and
wherein the device has different electrical characteristics depending on whether the coupling between the chip and the at least part of the antenna is physically separated.
1 Assignment
0 Petitions
Accused Products
Abstract
An RFID device includes a first, relatively permanent portion and a second alterable or inactivatable portion. Upon the occurrence of some predetermined event, the second portion and/or its coupling to the first portion is physically altered, inactivating it. The first portion may itself be an antennaless RFID device that may be read at short range, and the second portion may be an antenna that, when coupled to the first portion, substantially increases the range at which the first portion may be read. The second portion may be configured to be altered or inactivated by any of a variety of predetermined events, such as involving physical, chemical or electrical forces, performed either on the RFID device, or upon an object to which the RFID device is coupled.
78 Citations
28 Claims
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1. A radio frequency identification (RFID) device comprising:
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a transponder chip; and
an antenna coupled to the chip;
wherein coupling between the chip and at least part of the antenna is physically separable along a line of the device; and
wherein the device has different electrical characteristics depending on whether the coupling between the chip and the at least part of the antenna is physically separated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 24, 25, 26, 27)
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20. A radio frequency identification (RFID) device comprising:
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a first portion that includes a transponder chip; and
a second portion that includes at least part of an antenna that is coupled to the chip;
wherein the coupling between the chip and at least part of the antenna is physically separable along a boundary between the first portion and the second portion; and
wherein the device has different electrical characteristics depending on whether the coupling between the chip and the at least part of the antenna is physically separated. - View Dependent Claims (21, 22, 23)
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28. A method of associating information with an object includes:
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providing a radio frequency identification (RFID) device, wherein the RFID device includes;
a first portion that includes a transponder chip; and
a second portion that includes at least part of an antenna that is coupled to the chip;
wherein the coupling between the chip and at least part of the antenna is physically separable along a boundary between the first portion and the second portion; and
wherein the device has different electrical characteristics depending on whether the coupling between the chip and the at least part of the antenna is physically separated; and
coupling the RFID device to the object.
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Specification