Face Centered Anisotropic Surface Impedance Boundary Conditions in FDTD: Improved performance of staircased mesh for shielding problems

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Title of host publication2017 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO2017)
DateAccepted/In press - 7 Mar 2017
DatePublished (current) - 17 May 2017
Number of pages3
Original languageEnglish


We present a new face centered approach to the collocation of the fields for the application of a surface impedance boundary condition (SIBC). This approach deals with the ambiguities in the surface normal that arise at the edges on stair-cased surfaces.. The accuracy of the new scheme is compared to edge based and conformal approaches using both planar sheet and spherical shell test cases. Stair-casing effects are evaluated and the face-centered scheme exhibits significantly less error than the edge based approach.

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