Frequency selective surface aids to the operation of RFID products
First Claim
1. A system for increasing a read range of a radio frequency identification (RFID) tag, comprising:
- a RFID antenna configured to transmit a radio frequency (RF) signal to the RFID tag; and
at least one frequency selective surface (FSS) configured to increase a power flux density of the RF signal enroute to the RFID tag such that an effective distance between the RFID antenna and the RFID tag is reduced.
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Accused Products
Abstract
The present invention is directed to systems that use frequency selective surfaces (FSS) to aid in the operation of radio frequency identification (RFID) devices and products. In one embodiment, a system for interrogating radio frequency identification (RFID) tags includes a conveyor belt and an RFID reader. The conveyor belt has a first surface and a second surface. The first surface is configured to receive an item to which an RFID tag is affixed and the second surface is configured to slide on a metal slide plate. The RFID reader is configured to transmit instructions embodied in a radio frequency (RF) signal to the RFID tag, wherein the metal slide plate is positioned between the RFID reader and the RFID tag and comprises a frequency selective surface that is substantially transparent to the RF signal.
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Citations
14 Claims
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1. A system for increasing a read range of a radio frequency identification (RFID) tag, comprising:
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a RFID antenna configured to transmit a radio frequency (RF) signal to the RFID tag; and at least one frequency selective surface (FSS) configured to increase a power flux density of the RF signal enroute to the RFID tag such that an effective distance between the RFID antenna and the RFID tag is reduced. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for increasing a read range of a radio frequency identification (RFID) tag, comprising:
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transmitting, by a RFID antenna, a radio frequency (RF) signal to a RFID tag; and interacting the RF signal enroute to the RFD tag with at least one frequency selective surface (FSS), whereby a power flux density of the RF signal is increased such that an effective distance between the RFID antenna and the RFID tag is reduced. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification