Using Glide-Symmetric Holes to Reduce Leakage Between Waveguide Flanges

Ebrahimpouri, Mahsa; Brazález, Astrid Algaba; Manholm, Lars; Quevedo–Teruel, Oscar

doi:10.1109/lmwc.2018.2824563

Cited by 78 publications

(46 citation statements)

References 11 publications

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“…The theoretical analysis of some of these structures with glide symmetry was carried out using the Floquet theorem [12][13][14], which provides an effective tool for the analysis of periodic structures. Glide symmetries were successfully used to reduce the dispersion of periodic structures [15][16][17][18], to increase the equivalent refractive index [19][20][21][22], or to increase the band and attenuation of electromagnetic bandgaps [10,[23][24][25]. For example, glide symmetry was proposed to produce lens antennas for fifth-generation (5G) communications [26,27], taking advantage of their ability to generate a higher refractive index, less dispersion, and more isotropy [9].…”

Section: Introductionmentioning

confidence: 99%

One-Plane Glide-Symmetric Holey Structures for Stop-Band and Refraction Index Reconfiguration

2019

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This work presents a new configuration to create glide-symmetric structures in a single plane, which facilitates fabrication and avoids alignment problems in the assembly process compared to traditional glide-symmetric structures based on several planes. The proposed structures can be printed on the metal face of a dielectric substrate, which acts as a support. The article includes a parametric study based on dispersion diagrams on the appearance of stop-bands and phase-shifting by breaking the symmetry. In addition, a procedure to regenerate symmetry is proposed that may be useful for reconfigurable devices. Finally, the measured and simulated S parameters of 10 × 10 unit-cell structures are presented to illustrate the attenuation in these stop-bands and the refractive index of the propagation modes. The attenuation obtained is greater than 30 dB in the stop-band for the symmetry-broken prototype.

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Section: Introductionmentioning

confidence: 99%

One-Plane Glide-Symmetric Holey Structures for Stop-Band and Refraction Index Reconfiguration

2019

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“…Periodic structures with higher symmetry were first studied in the 1960s and 1970s in relation to one-dimensional periodic waveguides [1][2][3]. Recent work on structures with higher symmetries (in both one and two dimensions) has demonstrated various effects and devices, such as ultra-wideband Luneburg lenses [4,5], leaky-wave antennas with low frequency dependency [6], cost-efficient gap waveguide technology [7,8], contactless flanges with low leakage [9], low-dispersive propagation in periodic structure-based transmission lines [10,11], and fully metallic reconfigurable filters and phase shifters [12]. These results were obtained using metallic structures, however, in many applications only dielectric types of materials are allowed.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Glide-Symmetric Dielectric Structures

Šipuš

Bosiljevac

2019

Symmetry

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Recently, there has been an increased interest in exploring periodic structures having higher symmetry properties, primarily based on metallic realization. The design of dielectric glide-symmetric structures has many challenges, and this paper presents a systematic analysis approach based on Floquet mode decomposition and mode matching technique. The presented procedure connects the analysis of standard periodic structures and glide-symmetric realizations, thus giving insight into the wave propagation and interaction characteristics. The obtained results were verified in comparison with results from known references and using a commercial solver, proving that the proposed analysis technique is inherently accurate, and the degree of accuracy depends only on the number of modes used. The proposed analysis approach represents the first step in the design process of dielectric periodic structures with glide symmetry.

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“…This phenomenon opens an opportunity for the design of electromagnetic band gap (EBG) materials for mm-band components and integrated technology, which exploit the presence of a very wide stopband for efficient field confinement. In [15], [36], [37] these devices have been designed, fabricated and measured, thus proving the possibility to exploit this stop-band behavior for practical applications.…”

Section: Introductionmentioning

confidence: 99%

Glide-Symmetric All-Metal Holey Metasurfaces for Low-Dispersive Artificial Materials: Modeling and Properties

Valerio

Ghasemifard

Šipuš

et al. 2018

IEEE Trans. Microwave Theory Techn.

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We study the wave propagation between two glidesymmetric metallic plates drilled with periodic rectangular holes. A mode-matching method is proposed in order to derive efficiently the dispersive properties of these periodic structures. The method takes advantage of the higher symmetry of the structure reducing the computational cost by enforcing boundary conditions on the field on only one of the two surfaces. Physical insight on specific symmetry properties of Floquet harmonics in glide-symmetric structures is also gained. The code is validated with commercial software assessing its accuracy when varying the most influential/critical parameters. We confirm the potential of glide-symmetric structures to tune the effective refractive index. Specifically, we demonstrate that glide-symmetric structures with rectangular shapes can be employed to synthesize anisotropic refractive indexes with a large band of operation, which makes such metasurface structures applicable for realization of UWB planar lenses.

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Using Glide-Symmetric Holes to Reduce Leakage Between Waveguide Flanges

Cited by 78 publications

References 11 publications

One-Plane Glide-Symmetric Holey Structures for Stop-Band and Refraction Index Reconfiguration

One-Plane Glide-Symmetric Holey Structures for Stop-Band and Refraction Index Reconfiguration

Modeling of Glide-Symmetric Dielectric Structures

Glide-Symmetric All-Metal Holey Metasurfaces for Low-Dispersive Artificial Materials: Modeling and Properties

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