Abstract: the smart microwave switch is a moving object detector designed by Doppler effect.. It is a non-contact detecting the position of the object is the alchemist mobile, and related to the operation of the switch. The independent research and development of planar antenna transmitting and receiving circuit, intelligent detecting the electromagnetic environment around, automatically adjust the working state, integrated filter circuit can effectively suppress harmonics and other clutter interference, high sensitivity, strong reliability, convenient and safe, intelligent energy-saving is a novel and practical level meter intelligent microwave switch part of sending and receiving parts. Send part. Send the intermittent microwave signal with modulation mode. By adding the feedback circuit, the microwave signal is controlled by the feedback, and the microwave signal of the output is stable.. Receiver. The receiver demodulation signal after amplification by microwave signal amplitude, low frequency signal, the IF signal and sends to the control of the core were measured and measured results were in standard value are compared, so as to output different results, to determine the on-off of the switch.
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