Low noise amplifier and Radiometer - RF Cafe Forums
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Post subject: Low noise amplifier and Radiometer
Posted: Sun Jul 03, 2005 8:17 pm
Sorry if Im asking a silly question.
I really new in this RF stuff. Currently i'm plan
to design a basic radiometer receiver. The idea
is just a horn antenna feed to detector and then
to LNA before send to integrator. The detector that
I will be using will give outpur from Dc to 1Ghz.
My current problem is to obtain an LNA operate from
Dc to 1Ghz with a very low noise figure ( if possible
less than 1) which I still can't find it. My question
is .. is it easy to design a LNA from Dc to 1Ghz
with less than 1 NF?
If it durable ...I
plan to use a PHEMT transistor but I only found
PHEMT transistor operates from a few megaHetz to
Ghz. None from Dc to Ghz. Is such PHEMt exist?
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