Principles of action of Frequency Modulated Continuous Wave Radar systems with linear and step frequency modulation.

Author: Badri Khvitia
Keywords: FMCW Radars, automotive radars.
Annotation:

Abstract : Frequency Modulated Continuous Wave (FMCW) radar systems employ frequency modulation at the signal source to enable propagation delay measurements for determination of the distance to the target and velocity. FMCW radar differs from pulsed radar in that an electromagnetic signal is continuously transmitted. The frequency of this signal changes over time, generally in a sweep across a set bandwidth. The difference in frequency between the transmitted and received (reflected) signal is determined by mixing the two signals, producing a new signal which can be measured to determine distance or velocity. A saw tooth function is the simplest, and most often used, change in frequency pattern for the emitted signal. The seminar is dedicated to the Frequency Modulated Continuous Wave radars and they principles of action.