Fast starting, pulse primed DROs without phase noise degradation

A pulsed priming technique has been applied to series feedback DROs (dielectric resonator oscillators). Using the method, a DRO electrically tuned over 0.4% started in 60 ns without observable starting time jitter, settled to with +or-10 ppm in 150 ns, and delivered an output power of 14 dBm with a phase noise level of -92 dBc/Hz. A fixed tuned DRO also showed over 700-ns improvement in starting time when pulse primed with a phase noise level of -95 dBc/Hz. Since resonator Q reduction is not required, the inherent oscillator phase noise is not degraded. The present technique of introducing the priming signal allows for electrical tuning of the oscillator.<>