Assignment Guideline
A. Purpose
To write a MATLAB program to work on small-signal modeling, all the equations
applied in the program will be shown in the following
B. Materials provided
1. Cold-pinchoff device measured S-parameters
2. Cold-forward device measured S-parameters
C. Requirements to for the program (Please follow them step by step)
1. Read in the Cold-pinchoff S-parameters
2. Plot the S-parameters in rectangular plot (X-axis: frequency (GHz), Y-axis: (dB))
3. Transform the S-parameters into Z-parameters
4. ?11 = ?? + ?? + ??(?? + ??) +
1
??
(
1
??
+
1
??
) + δ??
?22 = ?? + ?? + ??(?? + ??) +
1
??
(
1
??
+
1
??
) + δ??
?12 = ?21 = ?? + ??(??) +
1
??
(
1
??
) + δ??
5. Plot the figure as shown below, the slope of the lines are the ω??, ω??, ω??
The axis value are shown by the axis
6. Read in the Cold-forward S-parameters
7. Plot the S-parameters in rectangular plot (X-axis: frequency (GHz), Y-axis: (dB))
8. Transform the S-parameters into Z-parameters
9. Plot another figure as shown below, the slope of the lines are shown in the
figure also
The axis value are shown by the axis
10. Form an chart shows the value of Inductors and Resistors, also please derive
the capacitors
Then, put the value back to Imaginary part of Z-parameters, you can derive the
capacitors