Wide-Angle Impedance Matching Using Glide-Symmetric Metasurfaces

Ebrahimpouri, Mahsa; Herrán, L.F.; Quevedo–Teruel, Oscar

doi:10.1109/lmwc.2019.2955074

Cited by 27 publications

(18 citation statements)

References 25 publications

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“…Furthermore, glide symmetries increase the on-axis anisotropy in unit cells with two-fold rotational symmetry (e.g., rectangular and elliptical holes) [17]. Finally, glide symmetry can enhance the magnetic response of periodic structures [18]. These properties were found in various periodic structures confirming that the benefits of glide symmetry are applicable to a wide range of practical microwave devices.…”

Section: Introductionmentioning

confidence: 77%

“…Finally, it has recently been discovered that glide symmetry is able to increase the magnetic response of periodic structures [18] while maintaining the values of permittivity nearly invariant. For example, in Fig.…”

Section: Magnetic Responsementioning

confidence: 99%

“…4). These permittivity and permeability values were calculated with the method proposed in [67], validated in [17], [18], [68] for glide-symmetric holey configurations covering a dielectric slab. Fig.…”

Section: Magnetic Responsementioning

confidence: 99%

“…Generally, the ability to tune the magnetic response, while maintaining the dielectric constant invariant, permits higher variations of the impedance for a constant value of an equivalent refractive index. This property is ideal for reducing the reflections in lenses [18] and absorbers. Some of these cases will be further discussed in Section V.…”

Section: Magnetic Responsementioning

confidence: 99%

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On the Benefits of Glide Symmetries for Microwave Devices

et al. 2021

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Section: Introductionmentioning

confidence: 77%

Section: Magnetic Responsementioning

confidence: 99%

Section: Magnetic Responsementioning

confidence: 99%

Section: Magnetic Responsementioning

confidence: 99%

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On the Benefits of Glide Symmetries for Microwave Devices

et al. 2021

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“…Furthermore, their stopbands benefit of stronger field attenuation and of a larger bandwidth with respect to the mirror-symmetric configuration [9,10]. Finally, glide-symmetric unit cells are able to produce higher levels of anisotropy [11], and higher magnetic responses [12].…”

Section: Introductionmentioning

confidence: 99%

Wave Propagation in Periodic Metallic Structures with Equilateral Triangular Holes

et al. 2020

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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°. 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.

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