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    DIRECTIONAL ANTENNA ARRAY
    1.
    发明专利
    DIRECTIONAL ANTENNA ARRAY 未知

    公开(公告)号：CA2505482C

    公开(公告)日：2013-01-22

    申请号：CA2505482

    申请日：2004-08-23

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： KNADLE RICHARD T JR ,  CHARYCH HAL E ,  GROSSFELD HENRY ,  PANDORF ROBERT P ,  NGOC MINH LUONG ,  BRIDGELALL RAJ

    IPC: H01Q9/28 ,  H01Q19/30

    Abstract: A directional antenna array is provided that includes a driven element and a first parasitic element separated from the driven element with the first parasitic element and/or the driven element having a width that is greater than about one-half a percent (0.5%) of an free-space wavelength of the directional antenna array. Alternatively or in conjunction, the directional antenna array includes a balun structure that is configured to couple the driven element to at least one of an electromagnetic energy source and an electromagnetic sink, and the balun structure includes a dipole structure, a first feed point extending from the dipole structure and a second feed point extending from the first parasitic element.

    Directional antenna array
    3.
    发明专利
    Directional antenna array 未知

    公开(公告)号：AU2010221814A1

    公开(公告)日：2010-10-07

    申请号：AU2010221814

    申请日：2010-09-16

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： CHARYCH HAL E ,  GROSSFIELD HENRY ,  NGOC MINH LUONG ,  BRIDGELALI RAJ ,  KNADLE RICHARD T JR ,  PANDORF ROBERT P

    IPC: H01Q9/28 ,  H01Q19/30

    Abstract: A directional antenna array is provided that includes a driven element and a first parasitic element separated from the driven element with the first parasitic element and/or the driven element having a width that is greater than about one-half a percent (0.5%) of a free-space wavelength of the directional antenna array. Alternatively or in conjunction, the directional antenna array includes a balun structure that is configured to couple the driven element to at least one of a electromagnetic energy source and a electromagnetic sink, and the balun structure includes a dipole structure, a first feed point extending from the dipole structure and a second feed point extending from the first parasitic element.

    FREQUENCY SELECTIVE SURFACE AIDS TO THE OPERATION OF RFID PRODUCTS
    5.
    发明专利
    FREQUENCY SELECTIVE SURFACE AIDS TO THE OPERATION OF RFID PRODUCTS 未知

    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

    IPC: H04B1/59 ,  H01Q1/42 ,  H01Q3/44 ,  H01Q15/02 ,  H01Q15/14 ,  H01Q15/24 ,  H01Q17/00

    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.

    FREQUENCY SELECTIVE SURFACE AIDS TO THE OPERATION OF RFID PRODUCTS
    6.
    发明专利
    FREQUENCY SELECTIVE SURFACE AIDS TO THE OPERATION OF RFID PRODUCTS 未知

    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

    IPC: G06K7/00 ,  G06K7/10 ,  H01Q1/22 ,  H01Q15/00

    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.

    DIRECTIONAL ANTENNA ARRAY
    7.
    发明专利
    DIRECTIONAL ANTENNA ARRAY 未知

    公开(公告)号：CA2505482A1

    公开(公告)日：2005-04-28

    申请号：CA2505482

    申请日：2004-08-23

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： GROSSFELD HENRY ,  KNADLE RICHARD T JR ,  BRIDGELALL RAJ ,  CHARYCH HAL E ,  PANDORF ROBERT P ,  NGOC MINH LUONG

    IPC: H01Q9/28 ,  H01Q19/30

    Abstract: A directional antenna array is provided that includes a driven element and a first parasitic element separated from the driven element with the first parasitic element and/or the driven element having a width that is greater than about one-half a percent (0.5%) of an free-space wavelength of the directional antenna array. Alternatively or in conjunction, the directional antenna array includes a balun structure that is configured to couple the driven element to at least one of an electromagnetic energy source and an electromagnetic sink, and the balun structure includes a dipole structure, a first feed point extending from the dipole structure and a second feed point extending from the first parasitic element.

    FREQUENCY SELECTIVE SURFACE AIDS TO THE OPERATION OF RFID PRODUCTS
    9.
    发明专利
    FREQUENCY SELECTIVE SURFACE AIDS TO THE OPERATION OF RFID PRODUCTS 未知

    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

    IPC: G06K7/00 ,  G06K7/10 ,  H01Q1/22 ,  H01Q15/00

    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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