Staircasing errors due to orthogonal meshing of electromagnetic cavities in FDTD

Research output: Contribution to conferenceAbstractpeer-review

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ConferenceIET Seminar on Electromagnetic modelling and simulations for RF and Microwave Applications
CountryUnited Kingdom
Conference date(s)29/11/1629/11/16

Publication details

DateAccepted/In press - 20 Sep 2016
DateUnpublished (current) - 29 Nov 2016
Number of pages1
Original languageUndefined/Unknown


Staircasing of surfaces is a known and well documented source of error in FDTD models on orthogonal structured meshes; however, very little work focuses on such errors in simulations of electromagnetic cavities. This work examines the different errors that arise as a direct result of using an orthogonal approximation of a hollow spherical shell. The spherical shell used has a radius of 1 m and is constructed of a simple material with a conductivity σ = 1000 S/m and a thickness h = 1 mm. This material was represented using a thin boundary SIBC model allowing a mesh size much larger than the thickness of the material. The orthogonally meshed sphere was illuminated using a planewave and the electric field measured at the centre allowing the shielding effectiveness (SE) to be calculated.

    Research areas

  • FDTD, Computational electromagnetics

Research outputs


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