An Integrated Coherent Startup 79-GHz Pulse Oscillator for a Sequential Sampling Pulse Radar

An approach to achieve a coherent startup condition, as it is required for the operation of a sequential sampling pulse radar, with a differential 79-G Hz V CO is presented. The proposed VCO is fabricated in a 250-GHz f
_T
SiGe BiCMOS technology. Theoretical boundaries and results from simulations are verified by measurements. The measured phase jitter of the VCO was less than 1.17 ps rms across the entire tuning range from 77 GHz to 83 GHz.