Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would
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Below are all of the forum threads, including all
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Post subject: S Parameter Test for Noise
Posted: Sat Nov 13, 2010 3:46 pm
Joined: Fri Jan 26, 2007 2:40
I've been wondering what others do when
trying to design wideband (or even narrowband I suppose)
amplifiers in, say, the DC - 3 GHz range. I've had some
trouble with getting measured data to match up with
We first used data from either the
manufacturer or even some companies who do S Params for you
(at a big cost). Lacking success there we were able to probe
test a number of components (passive and a few pHEMT fets)
but we've encountered a few problems. One thing that seems
to be a problem is Noise. This is an expensive proposition
(source-pull) so I'm wondering what other companies do to
reasonably predict what they might get for Noise Figure when
most manufacturers don't offer Gamma Opt and Rn etc. AND
getting your own Source Pull set it is a big cost.
Thanks for any insight.