Matching the MRFX1K80H: Bandwidth vs Gain vs Output power vs Efficiency

[Antoine]

Hello,

I've already used the MRFX1K80H transistor for narrowbands amplifiers, and the RF matching was quite easy to do.

But now I have to design a broadband power amplifier, to cover for example the 80-400 MHz band.

My question is: The MRFX1K80H is specified to be used from 1.8 to 400 MHz, but practically how can I estimate the maximum bandwidth that can be achieved by the amplifier, for a given gain/output power/efficiency ?

For example, is it realistic to design an amplifier with the MRFX1K80H that cover the 80-400 MHz band, with a 23 dB gain and 500 Watts output power ? (the values I give are just for the example).

Of course one possible solution would be to simulate it with a non-linear simulator tool, but unfortunately I don't have one; and I'd rather prefer a more theoretical approach, as a first step.

Thanks a lot for your help, or any documentation you have in mind that can be of interest !

Best regards,

Antoine

[ErikaC · Accepted solution]

Hello, 

I think these links may be useful for you.

http://www.polyfet.com/broadbandmatch.PDF
http://www.polyfet.com/30-512%20MHz%20Hybrid%20Power%20Amplifier%20Design%20Using%20GaN%20transistor...
https://www.highfrequencyelectronics.com/Dec07/HFE1207_GrebennikovPart1.pdf

Unfortunately, NXP does not offer broadband reference designs other than those on the website. You have to design such an amplifier on your own or contact a third-party design center.