Signal Integrity Modeling in Inhomogeneous Waveguide/PCB of Arbitrary Shape Using Broadband Green's Function

In this paper, using the Broadband Green's function with low wavenumber extraction (BBGFL) method, we develop the broadband Green's function for an arbitrary-shaped waveguide with two different dielectrics inside. We use the modes of an arbitrary-shaped waveguide to compute the broadband response of an arbitrary-shaped waveguide using the BBGFL method. In addition, we further apply the higher order low wavenumber extraction technique to accelerate the convergence of modal summations. The accuracy of BBGFL results are verified by comparing with results from the Method of Moment (MoM) and HFSS.