Design of a K-band fast hopping frequency synthesizer

The design and implementation of a K-band fast hopping frequency synthesizer based on DDS and PLL is described. Main technical specifications are as follows: frequency ranges from 24GHz to 27GHz, step frequency is 50MHz and lock time is less than 150ns. The parameters of loop filter and the analyses of phase noise and lock time are provided by MATLAB simulation to verify the feasibility of the design. Final test results of the circuits proves that the targets of performance are achieved.