PA design using NE6500379A

Hi,

I have try to use NE6500379A to design a power amplifier at 900MHz. However, when I measured, the S21 is 4dB lower than what I simulated. Moreover, how should I design a pa in getting at least certain gain. I do not require very high gain. Pls help me if any useful design notes on pa, of course, simplier will be much better.

Thanks a lot!

Candy

maybe saturated, or mismatch, I think

Hi
I just had the same experience. My sim in @dS looked great.
but the PA was tuned too high in freq. See if you get you expected
gain/power at some other freq too. Well I'm on my second layout and
is what I did this time was go to the LDMOS FET data sheet and look
at the Impedance (at "Opt pwr/Gain") and used these values for the
"TERMS" and "PORTS" (for MoMe|\|Tum) . This new layout did agree
with the tuning I did to get the first board working.

Hope this will help.
Good luck.

the distributed parameter is unsteady and difficult to control.the factual ways is to do more experiment ,conclud,refer to theory and so on.

I haven’t problems with NE6500379 in L-band, look carefully your simulation. Applications from CEL are very helpful.