Accurate plane-wave excitation in the FDTD method

Date
1997
Advisor
Instructor
Source Title
Proceedings of the Antennas and Propagation Society International Symposium, IEEE 1997
Print ISSN
0272-4693
Electronic ISSN
Publisher
IEEE
Volume
Issue
Pages
2164 - 2167
Language
English
Type
Conference Paper
Journal Title
Journal ISSN
Volume Title
Abstract

Different techniques are developed to implement plane-wave excitation on the finite-difference time-domain (FDTD) method, such as the initial-condition, the hard-source, and the connecting-condition techniques, for the total-field/scattered field (TF/SF) formulation. In the TF/SF formulation, the incident field is computed and fed to the 3D FDTD grid on the boundary separating the total-field and the scattered-field regions. Since the incedent field is a known quantity, a closed-form expression can be evaluated on every point of this boundary. A more efficient way of computing the incedent field is by using an incedent-field array (IFA), which is a 1D FDTD grid set-up to numerically propagate the incedent field into the 3D FDTD.

Course
Other identifiers
Book Title
Keywords
Boundary conditions, Electric fields, Electromagnetic wave propagation, Finite difference method, Interpolation, Time domain analysis, Absorbing boundary conditions (ABC), Finite difference time domain (FDTD) technique, Incedent field array (IFA), Total field/scattered field (TF/SF) formulation, Electromagnetic wave scattering
Citation
Published Version (Please cite this version)