Title :
A 3D modified FDTD (2,4) algorithm for improving phase accuracy with low resolution
Author :
El-Raouf, Hany E Abd ; El-Diwani, Esam A. ; Ammar, Abd El-Hadi ; El-Hefnawi, M.
Author_Institution :
Dept. of Microwave Eng., Electron. Res. Inst., Cairo, Egypt
Abstract :
A finite difference time domain method with low dispersion for time harmonic waves in 3D is presented. The method uses finite difference operators which are second order in time and fourth order in space with two independent optimization factors. The factors are used to minimize the phase error of the wave which enables the use of low resolution grids thus reduces the required memory. Good results for the phase accuracy are obtained compared with the second order Yee algorithm for the case of radiation from time-harmonic infinitesimal dipole
Keywords :
Maxwell equations; dispersion (wave); electromagnetic wave propagation; finite difference time-domain analysis; numerical stability; optimisation; 3D modified FDTD algorithm; Maxwell´s equation; dispersion equation; finite difference time domain method; fourth order finite difference operators; independent optimization factors; low dispersion; low resolution; low resolution grids; phase accuracy; phase error minimization; propagation constant; second order Yee algorithm; second order finite difference operators; stability condition; time harmonic waves; time-harmonic infinitesimal dipole radiation; Algorithm design and analysis; Conducting materials; Dielectric materials; Difference equations; Dispersion; Error correction; Finite difference methods; Maxwell equations; Optimization methods; Time domain analysis;
Conference_Titel :
Radio Science Conference, 1999. NRSC '99. Proceedings of the Sixteenth National
Conference_Location :
Cairo
Print_ISBN :
977-5031-62-1
DOI :
10.1109/NRSC.1999.760876
