Title :
A generalized local time-step scheme for the FVTD method for efficient simulation of microwave antennas
Author :
Fumeaux, Christophe ; Baumann, Dirk ; Leuchtmann, Pascal ; Vahldieck, Riidiger
Author_Institution :
Swiss Fed. Inst. of Technol., Zurich, Switzerland
Abstract :
This paper introduces a new generalized local time-step scheme to improve the computational efficiency of the Finite-Volume Time-Domain (FVTD) method. The new approach exploits the advantages of the FVTD method to use unstructured meshes (which allow inhomogeneity of cell densities) for large electromagnetic circuits with fine structural details and at the same time avoids the disadvantage of using a single time step determined by the smallest cell dimensions in the entire mesh. To illustrate this new scheme a large double-ridged horn antenna excited by a finely resolved coaxial feed is analyzed demonstrating a significant speed-up of the computation.
Keywords :
Maxwell equations; antenna theory; computational electromagnetics; finite volume methods; horn antennas; iterative methods; time-domain analysis; Maxwell´s equations; computational efficiency; conformal meshing; coupled equations; efficient simulation; fine structural details; finely resolved coaxial feed; finite-volume time-domain method; generalized local time-step scheme; large double-ridged horn antenna; large electromagnetic circuits; microwave antennas; unstructured meshes; Circuits; Computational efficiency; Computational modeling; Finite difference methods; Integral equations; Maxwell equations; Microwave antennas; Microwave theory and techniques; Stability; Time domain analysis;
Conference_Titel :
Microwave Conference, 2003. 33rd European
Print_ISBN :
1-58053-834-7
DOI :
10.1109/EUMC.2003.1262326
