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Ansys Learning Forum › Forums › Discuss Simulation › Electronics › ANSYS Electronics Circuit:Transient analysis error › Reply To: ANSYS Electronics Circuit:Transient analysis error

January 28, 2024 at 7:57 am
wen bo
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The balun is TCM2-63WX+, and the link is:1:2 CORE & WIRE Transformer, 30 - 6000 MHz, 50Ω | TCM2-63WX+ | Mini-Circuits (minicircuits.com)

The following figure shows the results of balun's S-parameter check.

In addition, the S-parameter model of PCB was extracted by SIWAVE, and I checked its causality and found that it was not good. Does this have any impact on the error (device s125(this is a balun model, not a PCB model)  tb#7 rejected) in transient simulation?The following figure is the causality check result of the S-parameter model of PCB.

And the following is the model and simulation Settings of PCB in SIWAVE, why the causality of PCB's S-parameter is so poor? Is there any way to improve it?