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Simulate Transistor Isolation with Harmonic Balance

Question asked by Asap on May 19, 2014
Latest reply on May 20, 2014 by Asap
Hello experts,

I've to simulate the s12 of a transistor model with large signal conditions; like a hot-s-parameter-measurement. I'm currently using the schematic for large signal amplifiers from the examples.

The problem is my transistor is not yet matched to 50 Ohms and I've to match it with respect to its s12 behavior. So i thought about changing the impedance of the terms with the tuning function to find the desired impedance. But with this it is necessary to re-normalize the calculated s-parameters. To do the math i have to build up a s-matrix with all 4 s-parameters. Is it possible to merge the calculated s-values to a matrix  and then do some math with it, like calculating the inverse matrix and multiply with another matrix. I know how to use equations with variables, but i need some vector algebra.

I would be glad to hear from you, thank you in advance