公开(公告)号：US20050104781A1

公开(公告)日：2005-05-19

申请号：US10975298

申请日：2004-10-28

申请人： Yasuhiro Notohara ,  Shinichiro Kaneko ,  Shoichi Shimizu ,  Koji Yoshida

发明人： Yasuhiro Notohara ,  Shinichiro Kaneko ,  Shoichi Shimizu ,  Koji Yoshida

IPC分类号： H01Q9/30 ,  H01Q1/24 ,  H01Q1/38 ,  H01Q1/52 ,  H01Q7/00 ,  H01Q7/04

CPC分类号： H01Q1/38 ,  H01Q1/52 ,  H01Q7/00 ,  H01Q7/04

摘要： The invention presents an antenna element capable of attenuating electric far filed while suppressing attenuation of magnetic near field of electromagnetic field radiated from loop antenna as an application example of antenna element, and a loop antenna and a communication control apparatus of wireless communications medium using the same. The antenna element of the invention comprises a conductor, and a conductive electromagnetic shield disposed on its surface by way of an insulator. The conductive electromagnetic shield has a ground contact, a lead portion, and a plurality of branches, and it is composed so as to determine uniquely the route from an arbitrary point of branches to the ground contact by way of the lead portion.

摘要翻译： 本发明提供一种天线元件，能够衰减电场，同时抑制从环形天线辐射的电磁场的磁场近场的衰减作为天线元件的应用示例，以及环形天线和使用其的无线通信介质的通信控制装置 。 本发明的天线元件包括导体和通过绝缘体设置在其表面上的导电电磁屏蔽。 导电电磁屏蔽具有接地触点，引线部分和多个分支，并且它被构成为通过引线部分唯一地确定从任意分支点到接地触点的路线。

公开(公告)号：US20050001031A1

公开(公告)日：2005-01-06

申请号：US10497111

申请日：2003-08-28

申请人： Hiraku Akiho ,  Yutaka Okazaki ,  Kazuo Goto ,  Akihiro Kikuchi

发明人： Hiraku Akiho ,  Yutaka Okazaki ,  Kazuo Goto ,  Akihiro Kikuchi

IPC分类号： G06K17/00 ,  G06K7/00 ,  G06K7/08 ,  G06K7/10 ,  G06K19/077 ,  H01Q1/22 ,  H01Q1/38 ,  H01Q7/00 ,  H01Q7/04 ,  H01Q7/06

CPC分类号： H01Q1/2216 ,  G06K7/0008 ,  G06K7/10316 ,  G06K7/10336 ,  G06K7/10346 ,  G06K7/10386 ,  G06K19/07749 ,  G06K19/07771 ,  G06K19/07779 ,  H01Q1/22 ,  H01Q1/38 ,  H01Q7/04 ,  H01Q7/06

摘要： An antenna apparatus (60) is provided which is used in a recorder and/or player to write and read data to and from a contactless IC card (1). The antenna apparatus (60) includes a loop coil (61) to radiate an electromagnetic field for magnetic coupling with a loop coil (4) at the IC card (1) to send and receive data to and from the IC card (1), and a magnetic sheet (62) disposed to face the main side of the loop coil (61), opposite to the main side facing the IC card (1). The magnetic sheet (62) has the specific permeability μ′ and product Ms.t of saturation magnetization Ms and thickness t thereof set in accordance with a necessary range of communications with the contactless IC card (1).

摘要翻译： 提供一种在记录器和/或播放器中用于向非接触式IC卡（1）写入数据和从非接触IC卡（1）读取数据的天线装置（60）。 天线装置（60）包括环形线圈（61），用于在IC卡（1）处辐射用于与环形线圈（4）磁耦合的电磁场，以向IC卡（1）发送数据和从IC卡（1）发送和接收数据， 以及与所述环形线圈（61）的与所述IC卡（1）相对的主面相对配置的磁性片（62）。 磁性片（62）具有根据与非接触式IC卡（1）的通信的必要范围设定的比磁导率μ'和饱和磁化强度Ms的乘积Mst和厚度t。

公开(公告)号：US6137447A

公开(公告)日：2000-10-24

申请号：US721949

申请日：1996-09-27

申请人： Shoshichi Saitoh ,  Masahiro Fujimoto ,  Katsuhisa Orihara ,  Susumu Yanagibori

发明人： Shoshichi Saitoh ,  Masahiro Fujimoto ,  Katsuhisa Orihara ,  Susumu Yanagibori

IPC分类号： G06K17/00 ,  G06K7/08 ,  H01Q1/52 ,  H01Q7/00 ,  H01Q7/04 ,  H01Q21/28 ,  H04B5/00

CPC分类号： G06K7/10336 ,  H01Q7/04 ,  H04B5/0081

摘要： In an antenna 1a for reader/writer of an interrogator in a non-contact data carrier system comprising the interrogator and a transponder, the antenna for reader/writer of the interrogator comprises a transmitting antenna 2 for transmitting a signal to the transponder and a receiving antenna 3 for receiving a signal from the transponder, and the receiving antenna 3 is a loop coil located at a position where magnetic fields of opposite polarities are induced in the receiving antenna 3 by magnetic coupling between the receiving antenna 3 and the transmitting antenna 2 and where the magnetic fields of opposite polarities cancel out each other. Preferably, the transmitting antenna 2 is comprised of at least two loop coils 2a, 2b for generating magnetic fields of opposite polarities to each other.

摘要翻译： 在包括询问器和应答器的非接触数据载体系统中的询问器的读写器的天线1a中，询问器的读/写器天线包括用于将信号发送到应答器的发送天线2和接收 用于接收来自应答器的信号的天线3，并且接收天线3是位于通过接收天线3和发射天线2之间的磁耦合在接收天线3中感应相反极性的磁场的位置处的环形线圈，以及 其中相反极性的磁场相互抵消。 优选地，发射天线2包括用于产生彼此相反极性的磁场的至少两个环形线圈2a，2b。

公开(公告)号：US6020856A

公开(公告)日：2000-02-01

申请号：US909036

申请日：1997-08-11

申请人： Jorge Alicot

发明人： Jorge Alicot

IPC分类号： G08B13/14 ,  G08B13/24 ,  H01Q7/04 ,  H01Q7/00

CPC分类号： G08B13/2477 ,  G08B13/2471 ,  G08B13/2474 ,  H01Q7/04

摘要： In an electronic article surveillance system, quadrature transmitting and receiving antennas are used to improve field distribution. A transmitting antenna arrangement includes first and second adjacent co-planar antenna loops and excitation circuitry for generating respective alternating currents in the first and second loops such that the respective alternating currents are 90.degree. out of phase. In a receiving arrangement, respective signals received from two adjacent co-planar antenna loops are respectively phase-shifted by +45.degree. and -45.degree., and the resulting phase-shifted signals are summed. A far-field cancelling transmitting antenna arrangement includes four loops operated at phases of 0.degree., 90.degree., 180.degree. and 270.degree. respectively. All four loops may be co-planar, with any bucking vertical segments being horizontally displaced from each other. Alternatively, the 0.degree. and 180.degree. loops may also be arranged in a common plane that is close to and parallel with another plane in which the 90.degree. and 270.degree. loops are arranged.

摘要翻译： 在电子物品监控系统中，使用正交发射和接收天线来改善场分布。 发射天线装置包括第一和第二相邻的共面天线环路和激励电路，用于在第一和第二环路中产生相应的交流电，使得相应的交流电流相位相差90°。 在接收装置中，从两个相邻的共面天线回路接收的相应信号分别相移+45°和-45°，并将所得的相移信号相加。 远场消除发射天线装置包括分别在0°，90°，180°和270°的相位操作的四个回路。 所有四个环可以是共面的，任何弯曲的垂直段彼此水平位移。 或者，0°和180°环也可以布置在与布置90°和270°环的另一平面接近并平行的公共平面中。

公开(公告)号：US5940043A

公开(公告)日：1999-08-17

申请号：US804193

申请日：1997-02-21

申请人： Larry K. Canipe ,  Gary Mark Shafer

发明人： Larry K. Canipe ,  Gary Mark Shafer

IPC分类号： H01Q1/22 ,  H01Q1/38 ,  H01Q7/04 ,  H01Q11/12 ,  H01Q11/14

CPC分类号： H01Q1/2208 ,  H01Q1/22 ,  H01Q1/38 ,  H01Q11/12 ,  H01Q11/14 ,  H01Q7/04

摘要： An antenna system for use in detecting an information tag in an interrogation zone comprising a first coil for generating a first field in an interrogation zone, a second coil that is larger than said first coil and positioned proximate the first coil for generating a second field that opposes the first field, and a nonferrous conductive plate positioned proximate the first and second coils and being shaped so that its periphery is approximately at least as large as the periphery of the second coil.

摘要翻译： 一种用于检测询问区中的信息标签的天线系统，包括用于在询问区中产生第一场的第一线圈，大于所述第一线圈并位于第一线圈附近的第二线圈，用于产生第二场， 与第一场相对，以及位于第一和第二线圈附近并且被成形为使得其周边大致至少与第二线圈的周边一样大的非铁导电板。

公开(公告)号：US5825291A

公开(公告)日：1998-10-20

申请号：US827041

申请日：1997-03-25

申请人： Victor Platt ,  Christopher Reinard Paul ,  Thomas A. Nicolette ,  Peter Y. Zhou

发明人： Victor Platt ,  Christopher Reinard Paul ,  Thomas A. Nicolette ,  Peter Y. Zhou

IPC分类号： G08B13/24 ,  H01Q7/04 ,  G08B13/14

CPC分类号： G08B13/2474 ,  H01Q7/04

摘要： An electronic article surveillance system capable of reliable operation at high frequencies such as about 8 MHz, has an arrangement of transmitter and receiver antennas each lying in a flat, horizontal plane in substantial alignment with each other, with the receiver antenna positioned at the floor of a passageway at an interrogation zone and the transmitter antenna positioned overhead. Each antenna takes the form of a pair of parallel-connected, coplanar loops with the transmitter-connected loops being positioned such that electrical current flows around each loop in parallel in the same direction (a ++ configuration) and in the receiver antenna electrical current flows around each loop in parallel in mutually opposite directions (a +- configuration). The antennas are approximately of the same size and overall configuration, and they are positioned in substantial alignment so that the currents induced in the receiver antenna by the field from the transmitter antenna will effectively cancel. Current variations caused by the passage of a target through the interrogation zone will be greater in some of the conductors of the receiver antenna than in others and so can be detected.

摘要翻译： 能够在诸如约8MHz的高频下可靠运行的电子物品监视系统具有发射器和接收器天线的布置，每个发射器和接收器天线彼此基本上对准地位于平坦的水平面中，而接收器天线位于 在询问区的通道和位于顶部的发射机天线。 每个天线采取一对并联连接的共面环路的形式，发射机连接的环路被定位成使得电流沿着相同的方向（a ++配置）并联在每个环路周围，并且在接收机天线中的电流 在相互相反的方向（a +配置）上并联流过每个环路。 天线大致相同的尺寸和总体配置，并且它们被定位成基本对准，使得在接收机天线中由发射机天线的场感应的电流将被有效地消除。 由目标通过询问区引起的电流变化在接收机天线的一些导体中比在其他导体中更大，因此可以检测。

公开(公告)号：USH1571H

公开(公告)日：1996-08-06

申请号：US267995

申请日：1994-06-29

申请人： Peder M. Hansen ,  James H. Schukantz

发明人： Peder M. Hansen ,  James H. Schukantz

IPC分类号： H01Q7/04 ,  H01Q21/00

CPC分类号： H01Q7/04

摘要： A compact transmitting and receiving antenna has dual feeds permitting magnetic and electric dipole radiation. The antenna includes a loop antenna disposed within a loop shield and a mast. The loop shield is insulated from ground and a feed is provided to it and the mast to excite these as an electric monopole. The shield becomes part of the monopole antenna and provides the benefits of top-loading. An isolation transformer permits the simultaneous transmission of monopole and dipole radiation. The transformer converts an unbalanced coaxial feed line to the balanced loop antenna and isolates the monopole feed voltage from the loop antenna feed. To eliminate the affect of the monopole feed on the loop feed, and vice versa, the components on the high side of the monopole feed (the loop shield and mast) are driven in common mode (voltage) by the monopole feed, and will not couple the loop antenna feed through the transformer windings. Thus, with respect to the monopole feed voltage, both sides of the transformer windings connected to a loop antenna will be at the same voltage. No voltage drop across the transformer windings due to the monopole feed voltage will occur and hence no coupling to the loop feed transmitter will take place. The voltage insulation requirements are concentrated at the monopole feed point so that the isolation feed transformer takes all the voltage, making the loop, loop shield and monopole driven in common mode.

摘要翻译： 紧凑的发射和接收天线具有允许磁和电偶极辐射的双馈。 天线包括设置在环形屏蔽和桅杆内的环形天线。 环形屏蔽层与地面绝缘，并且向其提供馈电和桅杆以将它们激发为电单极子。 屏蔽层成为单极天线的一部分，并提供顶部加载的优点。 隔离变压器允许同时传输单极和偶极辐射。 变压器将不平衡同轴馈电线路转换为平衡环形天线，并将单极馈电电压与环形天线馈电隔离。 为了消除单极馈电对环路馈电的影响，反之亦然，单极馈电（环路屏蔽和桅杆）高侧的组件通过单极馈电以共模（电压）驱动，不会 通过变压器绕组耦合环形天线馈电。 因此，对于单极馈电电压，连接到环形天线的变压器绕组的两侧将处于相同的电压。 不会因单极馈电电压而导致变压器绕组上的电压降，因此不会发生与环路馈电发射机的耦​​合。 电压绝缘要求集中在单极馈电点，使隔离馈电变压器全部采用电压，使环路，环路屏蔽和单极驱动成共模。

公开(公告)号：US5126749A

公开(公告)日：1992-06-30

申请号：US398629

申请日：1989-08-25

申请人： George W. Kaltner

发明人： George W. Kaltner

IPC分类号： G08B13/24 ,  H01Q7/04 ,  H01Q21/29

CPC分类号： G08B13/2477 ,  G08B13/2474 ,  H01Q21/29 ,  H01Q7/04

摘要： An antenna system for use in an electronic security system transmitter or receiver having two or more loops. Each loop of the transmitter or receiver antenna system being individually connected to a splitter network in the transmitter and a combiner network in the receiver.

公开(公告)号：US5103235A

公开(公告)日：1992-04-07

申请号：US292361

申请日：1988-12-30

申请人： Thomas G. Clemens

发明人： Thomas G. Clemens

IPC分类号： G08B13/14 ,  G08B13/24 ,  H01Q7/00 ,  H01Q7/04

CPC分类号： H01Q7/04

摘要： The transmitting and/or receiving antenna of an electronic article surveillance system utilizes a paired-lead loop configuration. One lead forms the active loop.The other lead forms a passive loop, which parallels and is mutually coupled to the active loop, but not conductively connected to it. This other lead is resistively loaded.The passive loop of the receiving antenna can also be used to conduct signals between the receiver circuitry and the alarm reporting devices associated with the receiver.

摘要翻译： 电子物品监视系统的发射和/或接收天线利用成对引线环配置。 一个线索形成主动循环。 另一个引线形成一个无源环路，它与主动环路并联并相互耦合，但不与其导电连接。 这个另一个引线是电阻加载的。 接收天线的被动回路也可用于在接收器电路和与接收器相关的报警报告装置之间传导信号。

公开(公告)号：US5061941A

公开(公告)日：1991-10-29

申请号：US473586

申请日：1990-02-01

申请人： Phillip J. Lizzi ,  Richard A. Shandelman

发明人： Phillip J. Lizzi ,  Richard A. Shandelman

IPC分类号： G01S13/74 ,  G01V3/00 ,  G01V3/10 ,  G01V15/00 ,  G08B13/24 ,  H01Q7/04

CPC分类号： G08B13/2477 ,  G08B13/2474 ,  H01Q7/04

摘要： A composite antenna system for an article surveillance system, in which a plurality of differently-phased loop antennas are supplied with different currents to provide desired positioning of peaks and nulls in the near-field strength, and to produce near-zero far-field strength, as desired. In one preferred form, a smaller loop is placed near the floor and a larger loop placed above it, with the lower loop supplied with a correspondingly higher-intensity of current to provide an enhanced near-field strength near the floor, while still maintaining far-field cancellation.