发明名称 |
Distributed antenna array with centralized data hub for determining presence and location of RF tags |
摘要 |
A distributed antenna array with a centralized data hub for determining the presence and location of RF tags has been disclosed. This antenna array centralizes electronics and distributes the RF to zones in a facility to greatly reduce the expense of recurring components for monitoring RF tags. A single BRT/hub with multiple antennas attached to transmit and receive ports is used to cover an entire facility. Large facilities are covered by a small number of the BRT/hub combinations. The BRT/hub has transmit antennas coupled thereto, preferably by co-axial cable, that transmit signals to a portion or all of the RF tags and all or a portion of them modulate and reflect the RF signal to a particular receiving antenna. The receiving antenna then returns the RF signal with tag data to the BRT/hub, preferably by co-axial cable. Also disclosed is an RF backscatter tag that cleanly switches a resonant aperture antenna on and off, thereby greatly increasing the mark-to-space ratio of the backscatter data. This enables tags to be detected by the BRT at much greater distances. |
申请公布号 |
US8070065(B2) |
申请公布日期 |
2011.12.06 |
申请号 |
US20080115657 |
申请日期 |
2008.05.06 |
申请人 |
OVERHULTZ GARY L.;HARDMAN GORDON E.;PYNE JOHN W.;GOLIATH SOLUTIONS, LLC |
发明人 |
OVERHULTZ GARY L.;HARDMAN GORDON E.;PYNE JOHN W. |
分类号 |
G06K7/08;G06F19/00;G06K19/00;G08B13/14 |
主分类号 |
G06K7/08 |
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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