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Problem with designing a LNA

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spbhu

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LOW NOISE AMPLIFER

Hi, I am designing a LNA. I find that the S21 at resonant frequency is about 0dB.But the voltage gain using AC simulation is about 15dB. What is the problem? Can anyone give help? Many thanks
 

vfone

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Re: LOW NOISE AMPLIFER

Be sure that you are using the same frequency for both, AC simulation and S21.
 

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