Newbie level 1
I have designed LNA, that contains three stages and bandpass filter. First stage is used ATF-36077 PHEMT GaAsFET. Following second stage with Minicircuits ERA-3 MMIC. Microtrip bandpass filter take out amplified outband signals and thrid stage, again with ERA-3, amplify final signal.
For PCB, I have used ROGERS 5880 material (Er=2.2; thickness = 1.575mm ).
My amplifier desire parameter as following:
Frenqency range: (2.65 -:- 3.15)GHz
Gain: (30 -:- 32)dB
Noise figure: <2dB
Supply voltage: +5V; -5V
Connectors type: N
I have calculated for LNA by hand. Therefore, my LNA is without accuracy and mis-matching. I achieved is about 10dB (too low).
Anybody has software to design LNA. Please! You design and calculate LNA in softwave. I wonder if you can to give me your LNA layout, so I make reference to it.
Thank you for your help!!!!!
I am looking forward your reply.