CST – Computer Simulation Technology

Modeling material properties based on measured data

Recording date: November 25, 2014

60 min


Electromagnetic field simulators are used in a design of the MW/RF circuits in order to lower the number of prototypes required, and reach a good agreement to the measured results. However, the robustness of virtual prototyping strongly depends on the quality of the input parameters for EM simulator. One of the most critical issues is an accurate characterization of the material properties used in the 3D EM simulation. For the dielectric material we need to know the broadband dispersion of complex permittivity (and/or permeability for ferrites), while the conductors exhibit a skin-depth effect, surface roughness and broadband permeability dispersion, as in case of ENIG plating.

This webinar will present several techniques for extracting material properties based on the measured S-parameters of simple geometry samples using CST STUDIO SUITE®. The importance of a manufacturing technology in the extraction process will be discussed in a relation to the robustness of the particular technique. The most important effects like etch factor, over-etching, over-milling, metallization thickness and the connection repeatability of low-cost end-launchers will be addressed showing real-world examples.

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