output power in Tom model

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bhatt_190487

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I am getting s21 parameter around 12dB but I am getting output power -16dB for input power -20dB. I want to get 10dB of output power for -20dB of input power dB. Which parameter should I change in my mesfet TOM model to get the required output power.
 

If you want to see 10dBm output power while the input is driven with -20dBm, the Gp must be 30dB.
Changing the model parameters in a large signal model of a transistor is not solution because model has been extracted for that transistor and it must be constant during design process.
What is your intention by changing model parameters ?? It doesn't make sense at all.Instead, you should correct your design to obtain desired performance.
If you amplifier has a 12dB small signal gain and if you get -16dBm output power when you apply -20dbm input power, there is a strictly an design error or an simulation error or something else..
If you post your design, we can say something concrete.Drawing is more explanatory than speaking..
 

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