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Microwave infrared dual technology detector working method
When passive infrared and microwave channels work independently, there is not enough immunity to false positives: PIR is very sensitive to thermal radiation interference. On the other hand, microwaves are very sensitive to radio frequency interference. Integrated passive infrared and microwave technologies can significantly enhance the detector's immunity to achieve low false alarm rates. Since the alarm signal is generated only when the passive infrared technology and the microwave technology detect the intrusion at the same time, the improvement of the low false alarm rate of the detector is realized.