NDLI: Comparison of absorbing boundary conditions for numerical analysis of periodic structures

Content Provider	IEEE Xplore Digital Library
Author	Butrym, A.Yu. Legenkiy, M.N.
Copyright Year	2007
Description	Author affiliation: Karazin Kharkov Nat. Univ., Kharkov (Butrym, A.Yu.; Legenkiy, M.N.)
Abstract	Periodic structures like gratings or frequency selective surfaces are widely met in antenna design and applications. Some problems require calculating reflectivity in a wide frequency band. Time domain methods like FDTD are beneficial in such problems since they provide the whole spectrum in a single simulation. A periodic structure is modeled as a Floquet waveguide. In FDTD the simulation region needs to be bound with absorbing boundary condition that imitates a semi-infinite waveguide. We tested several such conditions, which are widely used, and reveal that none of these performs well near cutoff frequencies. The problem is demonstrated on a simple illustrative diffraction problem. Some possible ways of improving ABC to overcome the difficulty are discussed.
Starting Page	239
Ending Page	242
File Size	361754
Page Count	4
File Format	PDF
ISBN	9781424415847
DOI	10.1109/ICATT.2007.4425170
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-09-17
Publisher Place	Ukraine
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency selective surfaces Performance evaluation Absorbing Boundary Condition. Time domain analysis Boundary conditions Mode Basis Method Reflectivity Numerical analysis Perfectly Matched Layer Floquet waveguide Klein-Gordon equation Gratings Periodic structures Finite difference methods Testing
Content Type	Text
Resource Type	Article

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