Staircasing errors due to orthogonal meshing of electromagnetic cavities in FDTD

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Research output: Contribution to conference › Abstract › peer-review

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Author(s)

Department/unit(s)

Electronic Engineering

Conference

Conference	IET Seminar on Electromagnetic modelling and simulations for RF and Microwave Applications
Country	United Kingdom
City	Nottingham
Conference date(s)	29/11/16 → 29/11/16

Publication details

Date	Accepted/In press - 20 Sep 2016
Date	Unpublished (current) - 29 Nov 2016
Number of pages	1
Original language	Undefined/Unknown

Abstract

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.