发明名称 |
DYNAMIC EAS DETECTION SYSTEM AND METHOD |
摘要 |
This invention relates to dynamically controlled, electronic article surveillance (EAS) systems whereby an array of antenna elements is digitally phased and actively driven for concurrent transmission, and digitally phased and combined in the receiver unit to improve security tag detection. In particular, the individual frequency and phase of the plurality of the transmit/receive signals are rapidly varied to allow for automated manipulation (steering) of the transmit field pattern and receive field sensitivity. It is the object of this invention to achieve the following features via means of digital phasing and dynamic computer control: sufficient far-field cancellation, null-free detection and uncompromised detection performance regardless of tag's orientation. |
申请公布号 |
WO2008154404(A2) |
申请公布日期 |
2008.12.18 |
申请号 |
WO2008US66159 |
申请日期 |
2008.06.06 |
申请人 |
CHECKPOINT SYSTEMS, INC.;OUNG, HARRY;ZENG, KEFENG |
发明人 |
OUNG, HARRY;ZENG, KEFENG |
分类号 |
H01Q3/26;G06K7/08;G08B13/24;H01Q1/22;H01Q7/00 |
主分类号 |
H01Q3/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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