Efficient excitation of waveguides in Crank-Nicolson FDTD González García, Salvador Costen, Fumie Fernández Pantoja, Mario Alberto Díaz Angulo, Luis Manuel Álvarez González, Jesús Crank-Nicolson Metallic waveguides Finite Difference Time Domain (FDTD) methods aveguide excitation Eigenvalues Eigenfunctions 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. 2015-04-07T12:39:23Z 2015-04-07T12:39:23Z 2010 info:eu-repo/semantics/article González García, S.; et al. Efficient excitation of waveguides in Crank-Nicolson FDTD. Progress In Electromagnetics Research Letters, 17: 27–38 (2010). [http://hdl.handle.net/10481/35446] 1937-6480 http://hdl.handle.net/10481/35446 10.2528/PIERL10072008 eng info:eu-repo/grantAgreement/EC/FP7/205294 http://creativecommons.org/licenses/by-nc-nd/3.0/ An error occurred getting the license - uri. info:eu-repo/semantics/openAccess Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License An error occurred on the license name. EMW Publishing