Start with Zout is not 100 ohms its 50, the antenna.
Steve why add 10 ohms at the input?? ?ELSIE can set the source and
load impedance to the desired value.? All the 10 ohms adds is
insertion loss and will distort the filter.
Generally with Elsie if I use real values and Qs I get result remarkably
close to reality.? By remarkably close if I use 10% caps, and measured
inductance I get what was modeled.? When they differ its due to strays
or component tolerance (or the selected filter is intolerant!) .
I find the TUNE function useful. With that I can inject some manual
Monte Carlo to see how it behaves with part variation.?
To move the cutoff up start with the base filter and trim the value
by a percentage of the original base frequency and the target.
That's only a starting point.?
So software simulation is as much how the user drives it can influence
the result.? GIGO!
RE: FERRITE over the years I've used a metric boat load of it for all manner?
of designs.? ?EVERY TIME I had an error that didn't measure there was an
error either not uniformly wound or under count (+1 turn).
FYI:? if you pinch the winding close rather than uniform a variation of
more than 10% is easily had and I've seen as much as 18% measured
from close to as wide as possible.
Tools that measure I have, AADE LCII (very accurate), ACE LCR,
NanoVNA (I have three), HP4191A impedance analyzer, Daton M250?
LCR bridge.? When they all agree, then the error is elsewhere.
Its very easy to create your own errors.
--
Allison
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