Implicit FETD for Conformal FSS (C-FSS) Analysis with Sum Factorization

An implicit finite-element time-domain (FETD) method is developed in this work, where matrix assembly avoided as sum factorization technique is introduced to accelerate the matrix-vector multiplication. It can significantly reduce the required computational time and memory consumption when high-order basis functions are applied. Numerical simulations of the conformal frequency selective surface (C-FSS) were conducted using the proposed algorithm.