发明名称 |
Detector |
摘要 |
A detector for detecting the presence of a memory tag, the detector comprising a radio frequency source operable to generate a radio frequency signal and a detector resonant circuit part connected to the radio frequency source, the detector resonant circuit part comprising an antenna, the detector further comprising a power monitor responsive to the power of a reflected signal returned from the detector resonant circuit part, the power monitor being operable to generate an output in response to the power of the reflected signal, €ƒ€ƒ€ƒ
wherein a decrease in the power of the reflected signal indicates the presence of a tag in the vicinity of the antenna. |
申请公布号 |
EP1431903(A3) |
申请公布日期 |
2006.03.29 |
申请号 |
EP20030257032 |
申请日期 |
2003.11.07 |
申请人 |
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. |
发明人 |
WATERS, JOHN DEREK;LOH, WENG WAH;DICKIN, FRASER JOHN |
分类号 |
G06K7/00;G06K17/00;G01S13/75;H04B5/02 |
主分类号 |
G06K7/00 |
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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