The invention relates to a coherent radar comprising a magnetron (10), a modulator (12) for pulsed driving if the magnetron, a stable local oscillator (22) and mixer (20) for producing an intermedicate frequency signal of incoming echoes and an intermediate frequency oscillator (28) and phase sensitive...http://www.google.fr/patents/US4682178?utm_source=gb-gplus-shareBrevet US4682178 - HF arrangement
