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    • 2. 发明申请
    • ACTIVE ANTENNA
    • 有源天线
    • WO2007028061A2
    • 2007-03-08
    • PCT/US2006034298
    • 2006-09-01
    • WG SECURITY PRODUCTS INC
    • YANG XIAO HUIYING GAO
    • H04H1/00H04H20/38H04H20/61H04H60/51
    • H04H20/38G08B13/2477G08B13/2488H04H20/61H04H60/51
    • An EAS system comprises a central circuit for sequentially generating signal bursts. At least one local transmitting antenna is positioned remote from the central circuit for receiving and propagating the signal bursts into an interrogation zone. A receiver is associated with the local transmitting antenna for detecting the presence of an electronic tag in the interrogation zone by means of a response tag signal from the electronic tag and transmitting the response tag signal to the central circuit. A synchronization device is provided for detecting the signal burst propagated from the local transmitting antenna, and controls the activation of the receiver for the purpose of receiving the response tag signal based on the timing of the signal burst.
    • EAS系统包括用于顺序产生信号脉冲串的中央电路。 至少一个本地发射天线远离中央电路定位,用于接收信号突发并将其传播到询问区中。 接收器与本地发射天线相关联,用于借助来自电子标签的响应标签信号检测询问区中电子标签的存在,并将响应标签信号发送到中央电路。 提供同步装置用于检测从本地发射天线传播的信号突发,并且为了接收基于信号突发的定时的响应标签信号而控制接收器的激活。