发明名称 |
Planar antenna |
摘要 |
The invention is a planar antenna which comprises a plurality of antenna elements positioned relative to each other in a predetermined orientation. Each of the elements is selectively electrically connectable to one or more of the other antenna elements. A plurality of switches electrically connect the plurality of antenna elements to each other. The switches are opened and closed by a signal operating at high speed enabling the antenna to act alternately in a first antenna configuration and a second antenna configuration using the same antenna structure. Doppler signals from the first and second antenna configurations are processed to determine the direction of a person or object in relation to a door.
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申请公布号 |
US6700542(B2) |
申请公布日期 |
2004.03.02 |
申请号 |
US20020122553 |
申请日期 |
2002.04.15 |
申请人 |
B.E.A.S.A. |
发明人 |
BORLEZ YVES;SECRETIN LAURENT |
分类号 |
H01Q21/20;G01S7/02;G01S13/56;H01Q1/22;H01Q3/24;H01Q13/00;H01Q13/06;H01Q13/08;H01Q21/06;(IPC1-7):H01Q1/38;H04M1/00 |
主分类号 |
H01Q21/20 |
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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