Patent ID: 6646587
Filing Date: 2003-11-11
Classification: G01S,Y02A

Abstract:
A Doppler radar apparatus comprising:a first oscillator for generating a first sweep signal to repeatedly sweep a predetermined frequency range periodically; a second oscillator for generating a second sweep signal having sweep properties identical to sweep properties of said first sweep signal, said second oscillator starting sweep before said first oscillator finishes frequency sweep; a synthesizer for synthesizing the first and second sweep signals to generate a transmission signal; a switch for receiving the first and second sweep signals as inputs, and switching an output between the first and second sweep signals synchronously with timing when sweep with each of the first and second sweep signals is terminated; and a mixer for mixing a reception signal coming from a part of the transmission signal reflected in a target and received, and an output signal from said switch with each other to produce an output signal from said mixer.