active bias network for an LNA !!

[mmarwan]

i need a famous topolgy for designing an active bias network for an LNA operating at 11.5 Ghz in an LNB ..
i found a one in Gonzales book but i need a good application note about this topology...
Another question....will the noise figure be degraded so much after biasing the transistor with this topolgy ?!
THANKS IN ADVANCE..

 

[boy]

there is an bias IC from inineon. the part number is BCR400W, BCR400W. Also, there is some appliction notes from Agilent.

 

[wjnbry]

i think you should make a match circuit.
for a bjt,fet,hemt,it's match circuit perphaps different.
for a certain impeadance match there have several sorts of
method.
for a 12Ghz frequency band,you should use a hemt or phemt,it have
a good noise performance.
bias circuit is not increase noise figure if you haven't a wideband demand.
for a sample you can pick up atf36077 use application in agilent website.
good luck.