Wideband Phase Shifter in Groove Gap Waveguide Technology Implemented With Glide-Symmetric Holey EBG

Rajo‐Iglesias, Eva; Ebrahimpouri, Mahsa; Quevedo–Teruel, Oscar

doi:10.1109/lmwc.2018.2832013

Cited by 82 publications

(52 citation statements)

References 9 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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“…Moreover, while the stop-band between the first and second modes is suppressed in glide-symmetric structures, a wide stop-band can be created between the second and third modes. This stop-band can be used to design low-cost gap waveguides [22][23][24] and low-cost contact-less waveguide flanges for millimeter wave measurements [25]. Due to the beneficial properties of glide symmetry, several methods for fast calculation of the dispersion characteristics of glidesymmetric structures (Cartesian and polar) have been presented [8,[26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Propagation characteristics of periodic structures possessing twist and polar glide symmetries

Dahlberg

Ghasemifard

Valerio³

et al. 2019

EPJ Appl. Metamat.

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In this article, we provide an overview of the current state of the research in the area of twist symmetry. This symmetry is obtained by introducing multiple periods into the unit cell of a periodic structure through a rotation of consecutive periodic deformations around a symmetry axis. Attractive properties such as significantly reduced frequency dispersion and increased optical density, compared to purely periodic structures, are observed. The direct link between the symmetry order and these properties is illustrated through numerical simulations. Moreover, polar glide symmetry is introduced, and is shown to provide even further control of the dispersion properties of periodic structures, especially when combined with twist symmetry. Twist symmetries can, with benefit, be employed in the development of devices for future communication networks and space applications, where fully metallic structures with accurate control of the dispersion properties are desired.

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Wideband Phase Shifter in Groove Gap Waveguide Technology Implemented With Glide-Symmetric Holey EBG

Cited by 82 publications

References 9 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

Propagation characteristics of periodic structures possessing twist and polar glide symmetries

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