Multilevel Improvements to Conformal FDTD for S-Parameter Extraction within Irregularly Shaped Transmission Lines

Application of the FDTD method to S-parameter analysis in circuits with ports formed by irregularly shaped transmission lines is considered. Conformal matched termination and a specialized system of S-parameter extraction based on conformal templates are developed and coupled to the conformal FDTD modelling of metal walls. The algorithm is validated for coaxial and ridged circular waveguide structures showing wide-band -80dB accuracy.