Low noise amplifier and Radiometer - RF Cafe Forums

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melloyz
 Post subject: Low noise amplifier and Radiometer
Posted: Sun Jul 03, 2005 8:17 pm 
Hi!

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?

Posted  11/12/2012