RFID device with changeable characteristics
First Claim
1. A radio frequency identification (RFID) device, comprising:
- an RFID device including a transponder chip;
an antenna coupled to the chip and there is a fusible link between the antenna and an electrical ground system;
a low-current power supply and a main power supply each coupled to the RFID device through at least one RF choke section; and
wherein the main power supply alters a function of the RFID device when the power supply is activated decoupling at least portions of the chip from the antenna and wherein power from the low-current power supply is applied directly to the transponder chip.
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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.
61 Citations
13 Claims
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1. A radio frequency identification (RFID) device, comprising:
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an RFID device including a transponder chip; an antenna coupled to the chip and there is a fusible link between the antenna and an electrical ground system; a low-current power supply and a main power supply each coupled to the RFID device through at least one RF choke section; and wherein the main power supply alters a function of the RFID device when the power supply is activated decoupling at least portions of the chip from the antenna and wherein power from the low-current power supply is applied directly to the transponder chip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification