Radar device for detecting intrusion of e.g. terrestrial vehicle, in sensitive area, has radar located on base, where deviation between emission frequencies of two radars is higher than half of addition of two spectral bands of one radar

摘要

The device has Doppler ultra high frequency (UHF) radars (41) located on a base (42). Each radar is defined such that deviation between the nominal frequency of the base and the emission frequency of the radar is lower in absolute value to the half of the difference of the high repetition frequency and the Doppler spectral band of the radar. Each radar defines the total Doppler spectral band, where the deviation between the emission frequency and another emission frequency of another radar is higher than half of the addition of the total Doppler spectral band and the Doppler spectral band.