Fractional Divider Concepts with Phase-Lock-Control for the Generation of Precise Linear Frequency Ramps

Thomas Musch, Ilona Rolfes, Burkhard Schiek †

Proceedings of the 28th European Microwave Conference, Vol. 1, pp. 451-456, Amsterdam, Netherlands, 1998


A highly linear analog frequency ramp generator based on a fractional divider concept is presented. The frequency ramp linearity achievable in this fractional phase-locked-loop configuration is excellent. This is revealed by numerical simulations as well as measurements performed with a prototype synthesizer implemented in a FMCW-radar system suitable for distance and velocity measurements.

[IEEE Library]