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Differential Via PairTransient Analysis Examples - Digital Signals
General Description
This example shows the calculation of a simple differential via pair. It analyses the eye-diagram using CST DESIGN STUDIO implementing Multipin-Ports and applying a pseudo-random bit-stream (PRBS). The model is created using simple shapes, curves, and different background layers.
Structure Generation
The vias and antipads are defined using cylinders, curves and other modeling features. The substrate and ground layers are defined by several PEC and dielectric layers in the 'Background' dialog using multiple background layers.
Solver Setup
The excitation is done using Multipin-Ports within the waveguide definition. The simulation frequency is set to the range 0-20 GHz and field monitors are set for 10 GHz.
Post Processing
The time signals and S-parameters of the transient calculation are listed in the navigation tree in the folder 1D Results. You can further analyze the E-Field and the Surface Currents at 10 GHz.
The S-parameter results of CST MICROWAVE STUDIO are used to perform an eye-diagram simulation in CST DESIGN STUDIO using several ports, transmission lines, and a PRBS as a data signal.
The eye-diagram can be analyzed under the voltage results in the navigation tree:
See also: Signal Integrity tutorial: Simulation of a Via Model
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