On the Computation of the Dispersion Diagram of Symmetric One-Dimensionally Periodic Structures

Symmetry

Francisco Mesa¹  Raúl Rodríguez-Berral¹  Francisco Medina² 

[1] Department of Applied Physics 1, ETS de Ingeniería Informática, Universidad de Sevilla, Av. Reina Mercedes s/n, 41012 Sevilla, Spain;;Department of Electronics &

关键词: periodic structures;    dispersion diagram;    high-order coupling;    glide symmetry;   

DOI  :  10.3390/sym10080307

来源: DOAJ

【 摘 要 】

A critical discussion on the computation of the dispersion diagram of electromagnetic guiding/radiating structures with one-dimensional periodicity using general-purpose electromagnetic simulation software is presented in this work. In these methods, full-wave simulations of finite sections of the periodic structure are combined with appropriate simplifying network models. In particular, we analyze the advantages and limitations of two different combined methods, with emphasis on the determination of their range of validity. Our discussion is complemented with several selected numerical examples in order to show the most relevant aspects that a potential user of these methods should be aware of. Special attention is paid to the relevant role played by the high-order coupling between adjacent unit cells and between the two halves of unit cells exhibiting reflection, inversion, and glide symmetries.

【 授权许可】

Unknown