发明名称 |
Alarm system RF transmitter receiver having single antenna with resonant circuit frequency two widely spaced frequencies spaced and processing channels two frequencies set. |
摘要 |
The system of transmission or reception of RF signals has a single resonant antenna (3) resonant between two frequencies. The signal is passed through an open or resonant circuit (17) between two widely spaced frequencies. Signals pass for processing to separate circuits processing the two offset frequency signals.
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申请公布号 |
FR2788644(A1) |
申请公布日期 |
2000.07.21 |
申请号 |
FR19990000393 |
申请日期 |
1999.01.15 |
申请人 |
ATRAL |
发明人 |
CREVOULIN ROLAND VICTOR LAURENT |
分类号 |
H04B1/00;H04B1/40;(IPC1-7):H04B1/50;G08B13/22 |
主分类号 |
H04B1/00 |
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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