Title :
Enhanced FD-TD equations for diagonal metal edges and their microwave applications
Author :
Foroughipour, S.M. ; Esselle, K.P.
Author_Institution :
Dept. of Electron., Macquarie Univ., North Ryde, NSW, Australia
Abstract :
The standard FD-TD method requires a very fine grid to model singular fields in the vicinity of sharp metal edges. This is a problem for simulating microwave structures composed of thin metal sheets, such as planar transmission lines and patch antennas. We have derived improved (enhanced) FD-TD equations for diagonal metal edges by considering field singularity. With these equations, various microwave structures can be analyzed accurately using a much coarser grid. In this paper, we demonstrate the application of enhanced FD-TD equations in: (1) modeling wave propagation in diagonal microstrip lines; and (2) simulating resonance in microstrip patch antennas. The accuracy of numerical results was improved by a factor of between 4 to 10, without additional computational overhead (time or memory)
Keywords :
antenna theory; electromagnetic wave propagation; finite difference time-domain analysis; microstrip antennas; microstrip lines; microwave devices; waveguide components; waveguide theory; diagonal metal edges; diagonal microstrip lines; enhanced FDTD equations; field singularity; microstrip antennas; microwave applications; microwave structures; patch antennas; planar transmission lines; resonance simulation; sharp metal edges; singular fields; thin metal sheets; wave propagation modelling; Computational modeling; Electromagnetic fields; Equations; Grid computing; Microstrip antennas; Microwave propagation; Microwave theory and techniques; Patch antennas; Planar transmission lines; Resonance;
Conference_Titel :
Microwave Conference, 2000 Asia-Pacific
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6435-X
DOI :
10.1109/APMC.2000.925816
