Title :
Implementation of surface impedance boundary conditions in upwind finite difference techniques
Author :
Lapahos, T. ; Lo Vetri, J.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Western Ontario, London, Ont., Canada
Abstract :
General dispersive surface impedance boundary conditions (SIBCs) are formulated in the time domain in conjunction with an upwind finite difference method for the solution of the Maxwell equations. The associated convolution integral is implemented using an efficient recursive technique. The technique is validated on a test problem consisting of a short Gaussian pulse impinging on a lossy dispersive half-space. The reflection coefficient obtained via this new technique is compared with the exact analytic solution and the results agree very well.
Keywords :
Maxwell equations; convolution; dispersion (wave); electric impedance; electromagnetic wave propagation; electromagnetic wave reflection; finite difference time-domain analysis; integral equations; recursive functions; Maxwell equations; analytic solution; convolution integral; lossy dispersive half-space; recursive technique; reflection coefficient; short Gaussian pulse; surface impedance boundary conditions; time domain; upwind finite difference techniques; Boundary conditions; Conductivity; Convolution; Dispersion; Eigenvalues and eigenfunctions; Finite difference methods; Magnetic fields; Maxwell equations; Surface impedance; Time domain analysis;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1997. IEEE., 1997 Digest
Conference_Location :
Montreal, Quebec, Canada
Print_ISBN :
0-7803-4178-3
DOI :
10.1109/APS.1997.625398
