Enhanced FD-TD equations for diagonal metal edges and their microwave applications

Seyed Mahmoudreza Foroughipour, K. P. Esselle

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review


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, (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).

Original languageEnglish
Title of host publicationAsia-Pacific Microwave Conference Proceedings, APMC
EditorsAndrew Parfitt
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages2
Publication statusPublished - 2000
Event12 Asia-Pacific Microwave Conference - Sydney, Australia
Duration: 3 Dec 20006 Dec 2000


Other12 Asia-Pacific Microwave Conference
CitySydney, Australia

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