CARDS AND METHODS OF READING THE SAME
First Claim
Patent Images
1. A card, comprising:
- an RFID circuit on or within a substrate; and
an antenna coupled to the RFID circuit;
wherein the card is configured such that a signal associated with the card is capable of being read by at least one RF reader.
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Accused Products
Abstract
A card according to one embodiment includes an RFID circuit on or within a substrate and an antenna coupled to the RFID circuit, where the card is configured such that a signal associated with the card is capable of being read by at least one RF reader.
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Citations
20 Claims
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1. A card, comprising:
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an RFID circuit on or within a substrate; and an antenna coupled to the RFID circuit; wherein the card is configured such that a signal associated with the card is capable of being read by at least one RF reader. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An RFID system, comprising:
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at least one RF reader; and a plurality of cards, each of the plurality of cards including; an RFID circuit on or within a substrate; and an antenna coupled to the RFID circuit, wherein the RFID circuit has an input impedance greater than an impedance of the antenna; wherein each of the plurality of cards are configured such that a signal associated with each of the cards is capable of being read by the at least one RF reader.
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18. A card, comprising:
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an RFID circuit; and an antenna coupled to the RFID circuit; wherein the card is configured such that a signal associated with the card is capable of being read by at least one RF reader, wherein the card is configured such that the antenna minimally affects electromagnetic RF fields in a vicinity of the antenna.
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- 20. The card of claim 20, wherein the antenna of each card has a sheet resistivity of at least about 1 Ω
Specification