%0 Journal Article
%T Efficient Excitation of Waveguides in Crank-Nicolson FDTD
%A Salvador Gonzalez Garcia
%A Fumie Costen
%A Mario Fernandez Pantoja
%A Luis Diaz Angulo
%A Jesus Alvarez
%J PIER     Letters
%D 2010
%I EMW Publishing
%R 10.2528/PIERL10072008
%X In this paper, we present a procedure to calculate the discrete modes propagated with Crank-Nicolson FDTD in metallic waveguides. This procedure enables the correct excitation of this kind of waveguides at any resolution. The problem is reduced to solving an eigenvalue equation, which is performed, both in a closed form, for the usual rectangular waveguide, and numerically in the most general case, validated here with a ridged rectangular waveguide.
%U http://www.jpier.org/pierl/pier.php?paper=10072008