FDTD analysis of an inclined microstrtp patch antenna, considering field singularity at the edges

Kant P. Esselle*, Mahmoudreza Foroughipour

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

Abstract

A rectangular microstrip patch antenna, inclined to the FDTD grid by 45°, is accurately analysed using enhanced FDTD equations for diagonal metal edges. The enhanced equations, derived by considering the singular nature of electromagnetic fields at sharp metal edges, properly model the patch with less number of FDTD cells. The same inclined patch antenna is modelled using two existing techniques as well, namely staircase and split-cell models, for comparison with enhanced equations. The resonance frequencies and the frequency response of the patch are computed using these three techniques, and are compared with a very accurate reference, which is obtained by analysing a similar patch but kept parallel to a much finer grid. It is found that the enhanced equations give extremely accurate results consistently, without any noticeable computing overhead. For example, the accuracy of the first resonance frequency using the enhanced equations is 1.1%, and that using the staircase and split-cell models is 7.1% and 3.5%, respectively. The enhanced equations are very stable, and are time-stepped at the maximum Courant limit in all simulations without any problems.

Original languageEnglish
Title of host publication IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages606-609
Number of pages4
ISBN (Print)078035639x
DOIs
Publication statusPublished - 1999
Externally publishedYes
Event1999 IEEE Antennas and Propagation Society International Symposium, APSURSI 1999 - Orlando, United States
Duration: 11 Jul 199916 Jul 1999

Conference

Conference1999 IEEE Antennas and Propagation Society International Symposium, APSURSI 1999
CountryUnited States
CityOrlando
Period11/07/9916/07/99

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