Title :
Spherical wave sources in FDTD
Author :
Potter, M.E. ; Okoniewski, M. ; Stuchly, M.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Arizona Univ., Tucson, AZ, USA
fDate :
4/1/2002 12:00:00 AM
Abstract :
A method is described which simulates the propagation of electromagnetic waves as spherical wave modes, approximated by an FDTD method. Modal equations in radius and time are discretized for explicit time-stepping. Angular functions are implemented analytically as required. Computed results for two examples are compared with analytic solutions - a resonator and a dipole near a conducting sphere - to demonstrate the validity of the method with very good agreement. This method is intended as a source condition in total/scattered FDTD methods, to allow for modeling of near-field object interactions without explicitly modeling the source.
Keywords :
electromagnetic wave scattering; finite difference time-domain analysis; modal analysis; resonators; FDTD method; angular functions; conducting sphere; dipole; electromagnetic wave propagation; explicit time-stepping; modal equations; near field scattering/interaction problems; near-field object interactions; resonator; source condition; spherical wave sources; Antenna measurements; Computational modeling; Costs; Electromagnetic propagation; Electromagnetic scattering; Equations; Finite difference methods; Robustness; Time domain analysis;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/7260.993295
