公开(公告)号：US20050162276A1

公开(公告)日：2005-07-28

申请号：US10854878

申请日：2004-05-27

申请人： Brent Balch ,  John O'Connell ,  William Hurd ,  Tom Spalding

发明人： Brent Balch ,  John O'Connell ,  William Hurd ,  Tom Spalding

IPC分类号： G06K7/08 ,  G08B13/24 ,  H01Q1/22 ,  H01Q3/26 ,  H01Q3/30 ,  H01Q7/00 ,  H01Q7/04 ,  H01Q7/06 ,  H01Q21/29 ,  G08B13/14

CPC分类号： H01Q1/2216 ,  G06K7/10316 ,  G06K7/10336 ,  G08B13/2474 ,  H01Q1/22 ,  H01Q3/26 ,  H01Q3/30 ,  H01Q7/00 ,  H01Q7/04 ,  H01Q7/06 ,  H01Q21/29

摘要： A system for minimizing the effect of null zones in an interrogation zone of a marker detection system. The system includes a reference antenna system configured to produce a first reference electromagnetic field during a first time period. The antenna system also includes a phase canceling antenna system configured to produce a second electromagnetic field substantially in phase with the reference electromagnetic field during the first time period and a third electromagnetic field substantially out of phase with the reference electromagnetic field during the first time period. The phasing of the first field or the second and third fields may be continuously switched while the phase of the other is held constant. A method of spatially shifting null zones in an interrogation zone of a marker detection system is also provided.

摘要翻译： 用于最小化标记检测系统的询问区中的空区域的影响的系统。 该系统包括被配置为在第一时间段期间产生第一参考电磁场的参考天线系统。 天线系统还包括一个相位消除天线系统，该相位消除天线系统被配置为在第一时间周期期间产生与参考电磁场基本同相的第二电磁场，以及在第一时间周期内基本上与参考电磁场不同相的第三电磁场。 第一场或第二和第三场的定相可以在另一个场的相位保持不变的同时连续切换。 还提供了一种在标记检测系统的询问区中空间移位空区域的方法。

公开(公告)号：US5512878A

公开(公告)日：1996-04-30

申请号：US319263

申请日：1994-10-06

申请人： Brent Balch ,  David L. Roberson

发明人： Brent Balch ,  David L. Roberson

IPC分类号： G08B13/24 ,  G08B13/14

CPC分类号： G08B13/2477

摘要： An electronic article surveillance (EAS) system includes a transmitting antenna, a driver operable for exciting the transmitting antenna, a receiving antenna and circuitry connected to the receiving antenna for improving the quality of transmissions from the transmitting antenna. The driver excites the transmitting antenna at a preselected system operating frequency and the circuitry connected to the receiving antenna improves the quality of transmissions from the transmitting antenna by lessening harmonics of the operating frequency in the transmissions. The harmonics are attributable to protection diodes connected to the receiving antenna for limiting voltages impressed thereon and otherwise adversely impacting on the receiver tag signal processing circuitry. The harmonic lessening circuitry is connected in parallel with the protection diodes and is operative to lessen protection diode harmonic generation.

摘要翻译： 电子物品监视（EAS）系统包括发射天线，可操作以激发发射天线的驱动器，接收天线和连接到接收天线的电路，用于提高发射天线的传输质量。 驾驶员以预选的系统工作频率激励发射天线，并且连接到接收天线的电路通过减少传输中的工作频率的谐波来改善来自发射天线的传输质量。 谐波可归因于连接到接收天线的保护二极管，用于限制施加在其上的电压，否则不利地影响接收器标签信号处理电路。 谐波减轻电路与保护二极管并联连接，可以减少保护二极管谐波产生。

公开(公告)号：US06320507B1

公开(公告)日：2001-11-20

申请号：US09545269

申请日：2000-04-07

申请人： Stanley Strzelec ,  Brent Balch ,  Robert Lynch

发明人： Stanley Strzelec ,  Brent Balch ,  Robert Lynch

IPC分类号： G08B1314

CPC分类号： G08B13/2488

摘要： An apparatus for synchronized operation of a plurality of EAS systems. The system includes two or more EAS systems. Each EAS system has a receiver for receiving the same RF synchronization signal sent from a remote source, a transmitter for transmitting a marker exciter pulse and an exciter pulse receiver. The transmitter and exciter pulse receiver of each of the EAS systems are selectively enabled a predetermined time after receiving the RF synchronization signal so that all EAS systems in a localized area can be synchronized with one another.

摘要翻译： 一种用于多个EAS系统的同步操作的装置。 该系统包括两个或多个EAS系统。 每个EAS系统具有用于接收从远程源发送的相同RF同步信号的接收器，用于发送标记激励器脉冲的发射器和激励器脉冲接收器。 每个EAS系统的发射器和激励器脉冲接收器在接收到RF同步信号之后被选择性地启用预定时间，使得局部区域中的所有EAS系统可以彼此同步。

公开(公告)号：US5640693A

公开(公告)日：1997-06-17

申请号：US297809

申请日：1994-08-30

申请人： Brent Balch ,  Steve Embling ,  Dave Roberson

发明人： Brent Balch ,  Steve Embling ,  Dave Roberson

IPC分类号： G01S13/78 ,  G08B13/24 ,  H03F3/217 ,  H04B1/04 ,  H04B5/00

CPC分类号： G08B13/2471

摘要： An electronic article surveillance (EAS) system includes a pulsed EAS transmitter, a linear power amplifier having active devices for linear amplification of signals input thereto and a controller for energizing the linear power amplifier active devices correspondingly with transmitter pulsations. A transmitter for use in electronic article surveillance, comprises a transmitting antenna, a source providing a succession of mutually spaced bursts of high-frequency signals, a linear power amplifier having active devices for linear amplification of the succession of mutually spaced bursts of high-frequency signals and a controller for selectively energizing the linear power amplifier active devices. The controller maintains the linear power amplifier active devices unenergized between successive of the mutually spaced bursts of high-frequency signals.

摘要翻译： 电子物品监视（EAS）系统包括脉冲EAS发射器，具有用于线性放大输入信号的有源器件的线性功率放大器和用于对应于发射器脉动激励线性功率放大器有源器件的控制器。 一种用于电子物品监视的发射机，包括一个发射天线，一个提供一连串相互间隔的高频信号脉冲串的源，一个具有有源器件的线性功率放大器，用于线性放大一系列相互间隔的高频脉冲串 信号和用于选择性地激励线性功率放大器有源器件的控制器。 控制器维持线性功率放大器有源器件在连续的相互间隔的高频信号脉冲串之间未通电。

公开(公告)号：US5600304A

公开(公告)日：1997-02-04

申请号：US556765

申请日：1995-11-02

申请人： William R. Accolla ,  Fadi E. Ayoub ,  Brent Balch

发明人： William R. Accolla ,  Fadi E. Ayoub ,  Brent Balch

IPC分类号： G01S13/74 ,  G08B13/24 ,  G08B13/187

CPC分类号： G08B13/2402 ,  G06Q10/087

摘要： An EAS central station has a number of input/output ports each for interfacing with a different personality local station. Hardware equipment and software programming of the central station have parts associated with the different personality local stations and a central processing unit selects the part of the hardware equipment and software programming associated with a local station.

摘要翻译： EAS中心站具有多个输入/输出端口，每个端口用于与不同的个性本地站接口。 中心站的硬件设备和软件编程具有与不同个性本地站相关联的部件，中央处理单元选择与本地站相关联的部分硬件设备和软件编程。