Wave Propagation in Periodic Metallic Structures with Equilateral Triangular Holes

Alex-Amor, AntonioUniv Politecn Madrid, Informat Proc & Telecommun Ctr, E-28040 Madrid, Spain.;Univ Granada, Dept Teoria Senal Telemat & Comunicac, E-18071 Granada, Spain. (author)

QC 20200529
This paper studies wave propagation in a periodic parallel-plate waveguide with equilateral triangular holes. A mode-matching method is implemented to analyze the dispersion diagram of the structure possessing glide and mirror symmetries. Both structures present an unexpected high degree of isotropy, despite the triangle not being symmetric with respect to rotations of 90 degrees. We give some physical insight on the matter by carrying out a modal decomposition of the total field on the hole and identifying the most significant modes. Additionally, we demonstrate that the electrical size of the triangular hole plays a fundamental role in the physical mechanism that causes that isotropic behavior. Finally, we characterize the influence of the different geometrical parameters that conform the unit cell (period, triangle size, hole depth, separation between metallic plates). The glide-symmetric configuration offers higher equivalent refractive indexes and widens the stopband compared to the mirror-symmetric configuration. We show that the stopband is wider as the triangle size is bigger, unlike holey structures composed of circular and elliptical holes where an optimal hole size exists.

TEKNIK OCH TEKNOLOGIER Elektroteknik och elektronik hsv//swe
ENGINEERING AND TECHNOLOGY Electrical Engineering, Electronic Engineering, Information Engineering hsv//eng
metasurfaces
periodic structures
equilateral triangular holes
mode-matching
dispersion analysis
glide symmetry
mirror symmetry
isotropy

Valerio, GuidoSorbonne Univ, CNRS, Lab Genie Elect & Elect Paris, F-75252 Paris, France.;Univ Paris Saclay, Cent Supelec, CNRS, Lab Genie Elect & Elect Paris, F-91192 Gif Sur Yvette, France. (author)
Ghasemifard, FatemehKTH,Elektroteknisk teori och konstruktion(Swepub:kth)u1m17fl0 (author)
Mesa, FranciscoUniv Seville, Microwaves Grp, Dept Appl Phys 1, Escuela Tecn Super Ingn Informat, E-41012 Seville, Spain. (author)
Padilla, PabloUniv Granada, Dept Teoria Senal Telemat & Comunicac, E-18071 Granada, Spain. (author)
Fernandez-Gonzalez, Jose M.Univ Politecn Madrid, Informat Proc & Telecommun Ctr, E-28040 Madrid, Spain. (author)
Quevedo-Teruel, OscarKTH,Elektroteknisk teori och konstruktion(Swepub:kth)u16a6hjt (author)
Univ Politecn Madrid, Informat Proc & Telecommun Ctr, E-28040 Madrid, Spain.;Univ Granada, Dept Teoria Senal Telemat & Comunicac, E-18071 Granada, Spain.Sorbonne Univ, CNRS, Lab Genie Elect & Elect Paris, F-75252 Paris, France.;Univ Paris Saclay, Cent Supelec, CNRS, Lab Genie Elect & Elect Paris, F-91192 Gif Sur Yvette, France. (creator_code:org_t)

By the author/editor: Alex-Amor, Anton ...; Valerio, Guido; Ghasemifard, Fat ...; Mesa, Francisco; Padilla, Pablo; Fernandez-Gonzal ...; show more...; Quevedo-Teruel, ...; show less...

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