Staircasing errors due to orthogonal meshing of electromagnetic cavities in FDTD

S.A. Bourke; J.F. Dawson; I. D. Flintoft; M.P. Robinson

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.

Original language	Undefined/Unknown
Number of pages	1
Publication status	Unpublished - 29 Nov 2016
Event	IET Seminar on Electromagnetic modelling and simulations for RF and Microwave Applications - University of Nottingham, Nottingham, United Kingdom Duration: 29 Nov 2016 → 29 Nov 2016

Conference

Conference	IET Seminar on Electromagnetic modelling and simulations for RF and Microwave Applications
Country/Territory	United Kingdom
City	Nottingham
Period	29/11/16 → 29/11/16

Keywords

FDTD
Computational electromagnetics

Access to Document

Postprint
This paper is a post-print of a paper submitted to and accepted for publication in Conference Proceedings of the IET Seminar on Electromagnetic modelling and simulations for RF and Microwave Applications, The University of Nottingham, 29 November 2016 and is subject to Institution of Engineering and Technology Copyright. The copy of record will be available at IET Digital Library.
Licence: Other

1 Finished
2 Active

FDTD and TLM Solver Development
Dawson, J. F. (Principal investigator), Porter, S. J. (Principal investigator), Flintoft, I. D. (Principal investigator), Clegg, J. (Principal investigator) & Marvin, A. (Principal investigator)
1/04/92 → …
Project: Other project › Miscellaneous project
CEM: Computational Electromagnetic Modelling
Dawson, J. F. (Principal investigator), Porter, S. J. (Principal investigator), Robinson, M. P. (Principal investigator), Marvin, A. (Principal investigator), Flintoft, I. D. (Co-investigator), Dawson, L. (Co-investigator) & Clegg, J. (Co-investigator)
1/01/88 → …
Project: Other project › Miscellaneous project
Computational electromagnetics for advanced materials and biomedical applications (EPSRC studentship)
Dawson, J. F. (Principal investigator), Robinson, M. P. (Principal investigator) & Bourke, S. (Student)
1/10/15 → 1/10/18
Project: Other project › Miscellaneous project

Cite this

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title = "Staircasing errors due to orthogonal meshing of electromagnetic cavities in FDTD",

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.",

keywords = "FDTD, Computational electromagnetics",

author = "S.A. Bourke and J.F. Dawson and Flintoft, {I. D.} and M.P. Robinson",

year = "2016",

month = nov,

day = "29",

language = "Undefined/Unknown",

note = "IET Seminar on Electromagnetic modelling and simulations for RF and Microwave Applications ; Conference date: 29-11-2016 Through 29-11-2016",

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TY - CONF

T1 - Staircasing errors due to orthogonal meshing of electromagnetic cavities in FDTD

AU - Bourke, S.A.

AU - Dawson, J.F.

AU - Flintoft, I. D.

AU - Robinson, M.P.

PY - 2016/11/29

Y1 - 2016/11/29

N2 - 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.

AB - 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.

KW - FDTD

KW - Computational electromagnetics

M3 - Abstract

T2 - IET Seminar on Electromagnetic modelling and simulations for RF and Microwave Applications

Y2 - 29 November 2016 through 29 November 2016

ER -

Staircasing errors due to orthogonal meshing of electromagnetic cavities in FDTD

Abstract

Conference

Keywords

Access to Document

Projects

FDTD and TLM Solver Development

CEM: Computational Electromagnetic Modelling

Computational electromagnetics for advanced materials and biomedical applications (EPSRC studentship)

Cite this