Differential noise figure measurements

Hello!

Can you recommend me some literature on differential noise figure measurement techniques? I need to measure differential LNA.

Thank you.

You need two baluns, one at the input, the other one at the output and measure it in single end.
Then apply Friis and deembed balun from measurement.

I hope it can help.

Mazz

I have baluns from 2 to 18 GHz - but they are, by itself are active circuits - so NF is not an option to measure in such way((.

Thanks anyway!