Analytic properties of dispersion curves for efficient eigenmode analysis of isotropic waveguides using a boundary element method

Recent developments in high-speed interconnects show a clear tendency towards higher bitrates, emphasizing the need for a reliable prediction of the waveguide behavior. We present a frequency domain eigenmode analysis of isotropic waveguides using a boundary element method. Some properties of the dispersion curves can be beneficially leveraged into the numerical framework for calculating the waveguide characteristics as a function of frequency. The method allows the incorporation of highly conductive materials, which is demonstrated in a numerical example.