Ultra low noise microwave oscillators with low residual flicker noise

This paper describes the design of two low noise microwave oscillators operating at 7.6 GHz. These oscillators use room temperature sapphire resonators operating in the TE/sub 01//spl delta/ mode which demonstrate unloaded Q's of 44,000. Silicon transposed gain amplifiers are used to produce low flicker noise corners of 1 to 2 kHz and a phase noise of -131 dBc at 10 kHz offset. Further improvements of 30 dB are expected using this technique.<
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