[time-nuts] locking oscillators - an increase in power and/or stability ?
gh78731 at gmail.com
Wed Oct 8 14:42:38 EDT 2014
Then you can Google "injection locked oscillators"
--- Graham / KE9H
On Wed, Oct 8, 2014 at 12:10 PM, Dr. David Kirkby (Kirkby Microwave Ltd) <
drkirkby at kirkbymicrowave.co.uk> wrote:
> There's a discussion on the "ukmicrowave" list about combining the
> power from two 10 GHz Gunn oscillators with a magic T. One might
> expect to get nearly double the power if the two oscillators are
> combined. What people are observing is getting more than double the
> power. To quote from
> "Individually, the two oscillators produced 64 and 70 mW,
> respectively, but produced a combined power output of 235 mW. "
> Another one
> "The stability of the combined oscillators was found to be higher than
> that of the individual oscillators. "
> It is hardly surprising the two lock together in frequency.
> I wonder if people see similar things with pendulums in clocks? I
> can't think of any logical explanation for this, but it seems to be
> more than an April fools joke.
> What is interesting is someone who just tried it says the current in
> the diodes goes down about a mA when combined, so the input power to
> the devices go down very slightly. Typically these things run at a few
> hundred mA, so 1 mA is likely to be less than 1 %.
> Dr. David Kirkby Ph.D CEng MIET
> Kirkby Microwave Ltd
> Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3
> 6DT, UK.
> Registered in England and Wales, company number 08914892.
> Tel: 07910 441670 / +44 7910 441670 (0900 to 2100 GMT only please)
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> and follow the instructions there.
More information about the time-nuts