Patent ID: 6563454
Filing Date: 2003-05-13
Classification: G01S

Abstract:
An FM-CW radar apparatus comprising:transmission means for separately producing a first FM modulation wave along a frequency-up direction and a second FM modulation wave along a frequency-down direction to transmit both the first FM modulation wave and the second FM modulation wave at the same time; reception means for receiving reflection waves reflected from an object, which are caused by said first and second FM modulation waves; beat signal detection means for detecting a first beat signal and a second beat signal in a separate manner between said reflection waves and said first second FM modulation waves; an analysis apparatus for analyzing frequency components of said first and second beat signals so as to measure a distance of said object and also a velocity of said object; and wherein a frequency of said first FM modulation wave and a frequency of said second FM modulation wave are set in such a manner that said frequencies thereof are intersected with each other in the vicinity of each of center frequencies of said first and second FM modulation waves.