Correct on all counts.
Anecdotal:
Off the record conversations with several of the NXP design and build/fabricate team revealed that at higher frequencies and full output power "waving a few pf (capacitance)" at the output transformer, (note the ground plane under the output transformer) resulted in additional stability of the amplifier. Sometimes
.
Omitting that ground pad also caused some "wonky" behavior around 13.56MHz (ISM Freq) in "some" examples.
The point of conversation was , as much as these people know about RF there are still some unexplained phenomena. I was impressed by there willingness to say " We don't know..."
I've only had one conversation with a representative from NXP that resulted in a less than enlightening and usually humorous discussion. I believe he is the the exception and needs to work on his people skills.
NXP eventually sent me a non disclosure agreement to sign. I sent it back unsigned with " If my word isn't worth a damn my signature sure isn't " . They continue to send me information, samples, and bad jokes. It's been a sometimes fun at other times taxing path. You see I'm a hack, a good one but still a hack. Damn the math and theory , full speed ahead! Cut , fit , and try , it's the English way !
I'll continue to post what I can . Hope it helps .
