An Extended Sub-Entire Domain Basis Function Method for Finite Periodic Structures

In this letter, an extended accurate sub-entire domain basis function method is proposed, in which the number of unknowns is further reduced than the original one. The solution time is shorter because the number of unknowns is reduced. Several examples are given, which show that numerical results given by the proposed method are in good agreement with those given by the method of moments and by the original one. Meanwhile, the CPU time is reduced by the proposed method.