A Comparison of MB-CBFM and Modified ASED Basis Function Method to Analyze Interconnected Finite Periodic Arrays

This letter compares the macro block-characteristic basis function method (MB-CBFM) with the modified accurate subentire-domain (ASED) basis function method to solve the interconnected finite periodic arrays. In the MB-CBFM, a compressed matrix equation whose size is less than that of the conventional CBFM can be obtained using the idea of macro blocks and the array theory. In the modified ASED method, a few sets of ASED bases on the cells are constructed by solving the subarray problem excited by the several plane waves. Afterwards, a reduced matrix equation will be obtained. The size of the matrix is greater than that in the MB-CBFM for the large-scale arrays. Numerical results obtained from the modified ASED basis function method are more accurate than those of the MB-CBFM.