Using matrix sparsification and impedance prediction technique with Phase Extracted basis functions to improve the Method of Moments

Method of moments is always considered as a “low frequency” method mainly because of the following two reasons. First, in order to maintain high accuracy, the mesh grid needs to be dense enough to give a good representation of the surface distribution of the unknown current. Secondly, the O(N
²
) computation time and O(N
²
) storage complexities of the Method of Moments are too expensive, where N is the number of unknowns.