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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.

http://edocs.soco.agilent.com/display/ads201101/Large+Signal+Amplifier+Simulations

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  

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