Title :
Application of the FDTD method in the modeling of bent coaxial structures
Author :
Van Hese, J. ; De Zutter, D.
Author_Institution :
Ghent Univ., Belgium
Abstract :
An extended finite difference time domain (FDTD) method is presented to model a typical interconnection structure consisting of a closed three-dimensional bent coaxial waveguide. In order to obtain a faster, more accurate, and more elegant implementation, some aspects of the FDTD method were studied. A transition formula to connect meshes with difference cell size is proposed. The derived formula was tested in a one-dimensional case, but is applicable in more-dimensional discretization schemes. A formula to correctly describe a transition between a discretization scheme in a Cartesian system and in a cylindrical coordinate system is obtained. This is a second-order discretization formula for the first-order derivatives in Maxwell´s equations. The validity of this approach is illustrated by a three-dimensional example.<>
Keywords :
difference equations; time-domain analysis; waveguide theory; waveguides; Cartesian system; FDTD method; Maxwell´s equations; bent coaxial structures; bent coaxial waveguide; closed 3D waveguide; cylindrical coordinate system; finite difference time domain; first-order derivatives; interconnection structure; meshes connection; second-order discretization formula; transition formula; Acoustics; Coaxial components; Connectors; Finite difference methods; Laboratories; Maxwell equations; Testing; Time domain analysis; Transmission line discontinuities; Transmission lines;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.
Conference_Location :
Dallas, TX, USA
DOI :
10.1109/APS.1990.115432
