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公开(公告)号：CA2526577A1
公开(公告)日：2004-12-09
申请号：CA2526577
申请日：2004-04-27
Applicant: SYMBOL TECHNOLOGIES INC
Inventor： BRIDGELALL RAJ , DURON MARK , KNADLE RICHARD T JR , CHARYCH HAL , NUDELMAN AVI
IPC: G08B13/14 , G06K20060101 , G06K19/077 , H01Q3/00 , H01Q9/00 , H01Q9/16
Abstract: An RFID relay device for an RFID transponder and methods are provided for relaying an RFID signal. The RFID relay device comprises at least two antenn a and a transmission line coupling the at least two antenna. In addition to th e two antenna and the transmission line, the RFID relay device comprises an impedance adjusting circuit coupled to the transmission line and configured for coupling to the RFID transponder.
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公开(公告)号：AT498871T
公开(公告)日：2011-03-15
申请号：AT07840404
申请日：2007-07-13
Applicant: SYMBOL TECHNOLOGIES INC
Inventor： KNADLE JR , DURON MARK
Abstract: A system for increasing the read range of a radio frequency identification (RFID) tag, comprising: a RFID antenna (960) configured to transmit a radio frequency (RF) signal to the RFID tag; and at least one frequency selective surface (930) 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 RFID tag is reduced.
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公开(公告)号：AU2004244182A1
公开(公告)日：2004-12-09
申请号：AU2004244182
申请日：2004-04-27
Applicant: SYMBOL TECHNOLOGIES INC
Inventor： CHARYCH HAL , DURON MARK , KNADLE RICHARD , BRIDGELALL RAJ , NUDELMAN AVI
IPC: B65D71/00 , G06K20060101 , G06K19/077 , G08B13/14 , H01Q3/00 , H01Q9/00 , H01Q9/16
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公开(公告)号：CA2542983C
公开(公告)日：2012-11-27
申请号：CA2542983
申请日：2004-10-21
Applicant: SYMBOL TECHNOLOGIES INC
Inventor： DURON MARK , BRIDGELALL RAJ
Abstract: A system comprising a transmitter element creating an interrogation signal and transmitting the interrogation signal and a receiver element receiving a reflection signal of the interrogation signal and combining the reflection signal and a feedback signal to cancel at least a portion of radio frequency echo signals in the reflection signal.
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公开(公告)号：AT545096T
公开(公告)日：2012-02-15
申请号：AT07776049
申请日：2007-04-24
Applicant: SYMBOL TECHNOLOGIES INC
Inventor： WULFF THOMAS , DURON MARK , HOTARD JUSTIN , VISCOUNT BRIAN , CHAMBERLIN IAN
IPC: G06K7/00
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Patent Agency Ranking
公开(公告)号：CA2672901C
公开(公告)日：2015-06-02
申请号：CA2672901
申请日：2007-07-13
Applicant: SYMBOL TECHNOLOGIES INC
Inventor： KNADLE RICHARD T JR , DURON MARK
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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公开(公告)号：DE602007012583D1
公开(公告)日：2011-03-31
申请号：DE602007012583
申请日：2007-07-13
Applicant: SYMBOL TECHNOLOGIES INC
Inventor： KNADLE RICHARD T JR , DURON MARK
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公开(公告)号：CA2856925A1
公开(公告)日：2008-07-03
申请号：CA2856925
申请日：2007-07-13
Applicant: SYMBOL TECHNOLOGIES INC
Inventor： KNADLE RICHARD T JR , DURON MARK
Abstract: A system for increasing the read range of a radio frequency identification (RFID) tag, comprising: a RFID antenna (960) configured to transmit a radio frequency (RF) signal to the RFID tag; and at least one frequency selective surface (930) 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 RFID tag is reduced.
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公开(公告)号：CA2856925C
公开(公告)日：2016-07-05
申请号：CA2856925
申请日：2007-07-13
Applicant: SYMBOL TECHNOLOGIES INC
Inventor： KNADLE RICHARD T JR , DURON MARK
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 a RFID reader. The conveyor belt has a first surface and a second surface. The first surface is configured to receive an item in 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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公开(公告)号：CA2672901A1
公开(公告)日：2008-07-03
申请号：CA2672901
申请日：2007-07-13
Applicant: SYMBOL TECHNOLOGIES INC
Inventor： DURON MARK , KNADLE RICHARD T JR
Abstract: The present invention is directed to systems that use frequency selective surfaces (FSS) to aid in the operation of radio frequency identification (R FID) devices and products. In one embodiment, a system for interrogating rad io frequency identification (RFID) tags includes a conveyor belt and an RFID reader. The conveyor belt has a first surface and a second surface. The fir st 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 RF ID reader is configured to transmit instructions embodied in a radio frequen cy (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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