Title:
DISTRIBUTED RFID ANTENNA ARRAY UTILIZING CIRCULAR POLARIZED HELICAL ANTENNAS
Document Type and Number:
WIPO Patent Application WO2007130482
Kind Code:
B1
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.
Inventors:
OVERHULTZ GARY L (US)
HARDMAN GORDON E (US)
MEAD ROBERT W (US)
HARDMAN GORDON E (US)
MEAD ROBERT W (US)
Application Number:
PCT/US2007/010675
Publication Date:
October 09, 2008
Filing Date:
May 03, 2007
Export Citation:
Assignee:
GOLIATH SOLUTIONS LLC (US)
OVERHULTZ GARY L (US)
HARDMAN GORDON E (US)
MEAD ROBERT W (US)
OVERHULTZ GARY L (US)
HARDMAN GORDON E (US)
MEAD ROBERT W (US)
International Classes:
G06K7/08; G06K7/00; G06K19/00; H01Q1/36; H01Q3/24; H01Q19/00; H01Q19/10; H04Q5/22
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