wa1...@att.net wrote: > Looking for comment here... > > The background: > I'm working on a sub mm-wave LO chain for > a ham radio application. While chasing issues > of close-in phase (ie: within 1KHz of RF > carrier) by peeling the "layers of the onion", > I'm starting to question the performance of > the MMICs that are used as buffers and amps > following my Wenzel reference OCXOs. > > Question(s): > Should any MMIC be allowed to be driven > close to compression or into compression > when striving for best close-in noise? > > I know and have seen the NF of a MMIC > degrade while in compression, but my > target right now is close-in noise rather > than broadband noise. > > My design, in summary, takes 5MHz up to 630GHz > via several multipliers and PLL stages. > > -Brian > Brian
The increased nonlinearity when driven into compression will enhance the conversion of low frequency noise to phase noise. Bruce _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.