| 摘要 |
The motion detecting radar system has a frequency tunable CW transmitter comprising a voltage tuned oscillator, an antenna, both of the latter coupled to a mixer. A receiver is coupled to the transmitter, and comprises a signal processor that includes amplifiers for sensing output signals from the mixer and detectors coupled to the amplifiers. A level shifter level shifts the detected signal, and a tone generator creates an audible tone whose frequency is a function of the relative motion of moving objects detected by the system. An FM transmitter comprises an FM antenna coupled to the receiver for transmitting the audible tone indicative of the motion of a moving object. An FM receiver detects the audible tone and reproduces it to indicate the presence of detected of moving objects. |
