Microwave vehicle detector

摘要

The present invention provides a microwave vehicle detector which includes a transceiver for transmitting microwave energy into a desired target area and for receiving reflections of this microwave energy from vehicle movement in this target area. The transceiver includes first and second diodes for enabling the microwave vehicle detector to determine the direction of vehicle movement relative to the position of the microwave vehicle detector. In this regard, these diodes are balanced, such that a predetermined phase difference will be produced between the doppler shift signals generated by these diodes. This phase difference is analyzed by a microprocessor to determine the speed and direction of the vehicle being detected.