On 8 Oct 2014 20:18, "paul swed" <paulsw...@gmail.com> wrote: > > David the locking makes sense but the other numbers do not make sense. > Combined best case would be +3 DBm also you say the current on the diodes > goes down. More power for less power in is not adding up.
I went to a users meeting yesterday at Keysight (formally Agilent) on mm wave / THz things. I discussed this Gunn diode issue with a couple of people. 1) There was a guy from Virginia Diodes http://vadiodes.com/index.php/en/ speaking. His company makes commercial extension units that get VNAs working above 1 THz and sources to several THz, so really are at the cutting edge. 2) A guy from a Scottish university (forget which) that makes Gunn diodes at 100's GHz. I couldn't resist asking both about this. 1) The academic making the Gunn diodes at 100's of GHz could not believe it. 2) The guy from Virginia Diodes was *not* at all surprised. He said that the magic T is now part of the cavity. The cavity has been completely changed, so it is hardly surprising that the diodes performed differently in a completely different cavity. He said that the properties of the cavity far removed from the oscillation frequency will effect how the diode performs They usually use isolators, but even different isolators change how oscillators behave. The fact that the oscillators were then coupled would again change the conditions, so all the more reason to expect different behaviour. Dave, G8WRB. _______________________________________________ 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.
