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.
Proceedings Title: Proceedings of 2012 IEEE Frequency Control Symposium
Conference Dates: May 22-24, 2012
Conference Location: Baltimore, MD
Conference Title: 2012 IEEE Frequency Control Symposium
Pub Type: Conferences
Frequency synthesis, Mixer, Phase noise, Regenerative divider