small signal equivalent circuit

Thread Starter

miraynur

Joined Apr 16, 2010
1
Low Noise Amplifier MBC13916NT1
s-parameters
S11 = 0.658 / -70
S21 = 2.84 / -4
S12 = 0.056 / -169
S22 = 0.722 / -87

How can I compute the center and radius of the 3 dB noise figure circle. how can I draw "small signal equivalent circuit":
 

t_n_k

Joined Mar 6, 2009
5,455
You might consider downloading Agilent's AppCad software [free license] which includes an 's'-parameter analysis tool with the functions in which you are interested.

The trick is finding a download site. I think I originally downloaded it through the RF Globalnet site but you have to sign up as a member - which is also a free service. That site also has some other interesting 'stuff' for the RF engineering fraternity.
 
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