Mixed-form Nested Approximation for Wideband Multiscale Simulations

We propose a mixed “skeleton” and “equivalence” nested approximation method to compress the impedance matrix of the method of moments for the wideband multiscale simulations. We first introduce a nested skeleton approximation, where the impedance matrix is expressed recursively by sampling the dominant basis functions (e. g., skeletons) with a fully algebraic implementation from the original basis...