Radar having a transmitter oscillator which can be excited quasi-phase coherent (quasi-phase) by an evaluation oscillator.

System emitting elements to send a signal and receiving elements for receiving a reflection of the signal sent, presenting emitting elements emitting oscillator whose supply voltage can be connected and disconnected, characterized in that the receiving elements have an evaluation oscillator and that the emission oscillator can be excited by the evaluation oscillator and / or the evaluation oscillator by the transmitting oscillator almost phase coherence through a coupling.