| 摘要 |
The device has an antenna (100) connected by a conductor (122) to an RF circulator (120) which is turn connected by a conductor (124) to an oscillator (126). The RF circulator (120) is also connected by a conductor (129) to RF amplifiers (128) which are in turn connected by a conductor (130) to a detector (132). The detector (132) is connected by a conductor (133) to operational amplifiers (134) which are connected by a conductor (135) to a low pass filter (138) which is in turn connected by a conductor (139) to a comparator (140). The comparator (140) gives an output on a conductor (145) and, after computation performed on that output, another output an another conductor (146).
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