Greetings!
Attached are Three datasheet screengrapbs as to what may help you find what you're looking for to demonstrate something...
ON Semi -FQP130N10 (Non - L)
On SEMI FCPF400N60 Super FET II
Vishay IRF520
In simple terms...
MOSFET has an inherent bane of slow OFF times - and it can be shown in their input and output capacitance - larger capacitance on the substrate equates to a harder time to remove the charge from the gate region...or change it from on to off and off to on...lag times...
Large amperage units capable of switching heavy loads are not favorites - they are thick layered substrate and large surface area gates which leave a lot of surface to remove energy as well as place a charge on so they take a considerable amount of EMP push to overcome their reactive impedance AGAINST having a charge placed on them
13N10 and the IRF520 are the most ideal due to switching times and capacitance both in and out of their substrates...less delay and less effort to get them to turn on and off - equates to less output coupling "mess" and less chance of input matching issues. Their small chip designs keep capacitance to manageable levels.
Now just having low capacitance just doesn't always mean they're the best suited for the application - others may have a lagging problem in rise or fall times but ARE the ones that closely exhibit a desirable slope and crest (Overshoot) and trough (Dip) that is a lot like the frequency of interest when these devices are used CLOSER TO THEIR MAXIMUM USEABLE FREQUENCY (like the 13N10) or MUF - have that desirable trait - because of the matching output "trait" or power curve tends to mimic the Bi-polars' own "smith chart wanderings"
Before I start to hear cracking knuckles and banging keyboards...
The "Smith Chart" reference is due to the devices electrical traits not because it matches the conjugate....-ed.
Just keep gates above their 2V thresholds to turn on and nothing more than 4 volts else you're wasting power.
See attached screengrabs for details of what I'm trying to show you...
Hope this helps!
:+> Andy <+: