Abstract
The electromagnetic modeling of practical finite periodic structures is a topic of growing interest. Due to the truncation of infinite periodic structures, surface waves will be excited and localized near discontinuous interfaces leading to the edge effect. In this work, surface waves are numerically extracted and their magnitudes and decay rates are analyzed for different materials and geometries. Based on the exponential decay of the surface wave, a novel method is developed by connecting the solution to the large finite array problem with that to a relatively small one to achieve low complexity and memory consumption. The method numerically reconstructs propagating Bloch waves and surface waves according to the Bloch-Floquet theorem of periodic structures and translation invariant properties of semi-infinite periodic structures, respectively. Numerical examples are shown for near-field distributions and far-field radiation patterns. The results obtained from small finite periodic structures capture the edge effect and agree well with the results by the rigorous element-by-element approach.
Recommended Citation
X. Y. Xiong et al., "Efficient Calculation Of Large Finite Periodic Structures Based On Surface Wave Analysis," IEEE Transactions on Antennas and Propagation, vol. 63, no. 1, pp. 69 - 80, article no. 6937152, Institute of Electrical and Electronics Engineers, Jan 2015.
The definitive version is available at https://doi.org/10.1109/TAP.2014.2365211
Department(s)
Electrical and Computer Engineering
Keywords and Phrases
Edge effect; finite periodic structures; frequency selective surface; leaky wave antenna; surface and Bloch waves
International Standard Serial Number (ISSN)
0018-926X
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Institute of Electrical and Electronics Engineers, All rights reserved.
Publication Date
01 Jan 2015
