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unity current gain frequency ft in Advanced Design System

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Manjularamkumar

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Hi,

I am doing LNA design in ADS.

I want unity current gain frequency.

This will get from H21 parameter.

I give vdd and bias voltage of .13um transistor and simulate this using S-parameter and DC parameter.

I didnt get the valoe because H21 parameter value less than -1db.

Why this occur.

how will i get the ft value in ADS.

Plz anybody help me.
 

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