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LNA Design for satellite receiver - RF Cafe Forums

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 Post subject: LNA Design for satellite receiver
Posted: Sun May 15, 2005 3:05 pm 
 
Lieutenant

Joined: Sun May 15, 2005 2:46 pm
Posts: 1
Can anyone tell me how it is possible to build a low noise amplifier with a gain of more than 50 dB and a noise figure less than 1 dB? Most LNB's of a satellite receiver have such good characteristics but most commercial IC's and MMIC's are far away from that.


 
   
 
 Post subject:
Posted: Thu May 19, 2005 2:50 pm 
The overall noise figure is dominated by the first stage in the design. You could cascade several amps and rig up a high gain low noise amp yourself. Only the first stage would have to be low noise, the rest don't have to.


 
  
 
 Post subject:
Posted: Sat May 28, 2005 2:24 pm 
what frequencies are we talking about?




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