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|Author(s):||Archita Hati; Craig W. Nelson; Corey A. Barnes; Danielle G. Lirette; Jason A. DeSalvo; Tara M. Fortier; Franklyn J. Quinlan; Andrew D. Ludlow; Till P. Rosenband; Scott A. Diddams; David A. Howe;|
|Title:||Ultra-low-noise Regenerative Frequency Divider for High Spectral Purity RF Signal Generation|
|Published:||May 24, 2012|
|Abstract:||We implement an ultra-low-noise frequency divider chain from 8 GHz to 5 MHz that utilizes custom-built regenerative frequency divide-by-2 circuits. The single-sideband (SSB) residual phase noise of this regenerative divider at 5 MHz output is -163 dBc/Hz at 10 Hz offset frequency. This level is achieved with custom-built mixers that use 2N2222A bipolar junction transistors in a conventional double-balanced diode ring. We report absolute PM noise of radio- frequency (RF) signals at 10 MHz and 5 MHz obtained by dividing an 8 GHz signal generated from ultra-stable optical comb-based frequency division. The absolute SSB phase noise for a 10 MHz and 5 MHz signal at 1 Hz offset is ‹ 143 dBc/Hz and -150 dBc/Hz and at 100 kHz offset is -174 dBc/Hz and -177 dBc/Hz, respectively.|
|Conference:||2012 IEEE Frequency Control Symposium|
|Proceedings:||Proceedings of 2012 IEEE Frequency Control Symposium|
|Pages:||pp. 1 - 4|
|Dates:||May 22-24, 2012|
|Keywords:||Frequency synthesis,Mixer,Phase noise,Regenerative divider|