Registers – Coded record sensors – Particular sensor structure
Reexamination Certificate
2006-05-04
2009-11-10
Walsh, Daniel (Department: 2887)
Registers
Coded record sensors
Particular sensor structure
C235S487000, C235S492000, C235S493000, C343S895000, C340S572100, C340S572700
Reexamination Certificate
active
07614556
ABSTRACT:
In accordance with the teachings described herein, RFID systems are provided that include a distributed RFID antenna array utilizing one or more circular polarized helical antennas. A plurality of RFID tags may be used, with each RFID tag including a linear polarized antenna for communicating RFID tag signals. One or more receiver antennas may be used for receiving the RFID tag signals from the RFID tags. An RFID tag signal reader may be used to process RFID tag signals received by the receiver antennas. In one example, the receiver antennas may include a circular polarized helical antenna element. One or more transmitter antennas may be used for transmitting an RF signal to the plurality of RFID tags, the transmitter antennas including a circular polarized helical antenna element. A transmitter may be used to generate the RF signal for transmission by the transmitter antennas. In one example, the RFID tag signal reader and the transmitter may be included in a single reader/transmitter unit.
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Tyco Electronics—Slimline RFID Antenna—Japan, Dual Circular Polarized, 950-956 MHZ, Product Specification.
Texas Instruments, UHF Applications Installation Hints.
Hardman Gordon E.
Overhultz Gary L.
Pyne John W.
Strazdes Edward J.
Goliath Solutions, LLC
Jones Day
Walsh Daniel
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