Periodic Structures With Higher Symmetries: Their Applications in Electromagnetic Devices

Quevedo–Teruel, Oscar; Valerio, Guido; Šipuš, Zvonimir; Rajo‐Iglesias, Eva

doi:10.1109/mmm.2020.3014987

Cited by 21 publications

(7 citation statements)

References 72 publications

(124 reference statements)

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“…Simple holes could not be used since they do not guarantee the stop band in all the directions. The glide symmetry configuration [195] creates an electromagnetic band-gap [118], [196], therefore the energy only escapes through the longitudinal slot. To implement the non-radiating side with glide symmetry, the corresponding unit cell (inset of Fig.…”

Section: Combination With a Leaky-wave Antennamentioning

confidence: 99%

Single-Layer Dual-Band Leaky Wave Antennas Design Methodology with Directivity Control

Memeletzoglou

Rajo‐Iglesias

Blanco

2018

2018 IEEE International Symposium on Antennas and Propagation &Amp; USNC/URSI National Radio Science Meeting

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While this journey comes to an end, I couldn't be more grateful for all the people that supported me during these years. First of all, I would like to thank my advisor Eva, for always being there to help me when I needed her, for the knowledge she shared with me, and for always trying to make the best out of everything.I would also like to thank Oskar Dalhberg and Qiao Chen from KTH Royal Institute of technology for the antenna measurements in the anechoic chamber.Of course I would never be able to reach this point, if I didn't have the help of my parents and their support towards any decision I made. Special thanks to my brother Χάρης who made me laugh even in difficult times. I am grateful for my close friends who were always there for me. Last but not least, my greatest thanks to Ignacio for encouraging me and giving me strength. I could never do this without his 24/7 support during all these years.Σας ευχαριστώ όλους και τον καθένα ξεχωριστά, χωρίς εσάς δεν θα είχα φτάσει ως εδώ. Ναυσικά vi vii ContentsAcknowledgements v Related Publications xiiiResumen xixxx de frecuencias mucho más bajas, puede utilizarse también en aplicaciones de sistemas radar. En la segunda parte, se han desarrollado e implementado diseños innovadores de antenas y arrays usando la tecnología gap waveguide en particular su versión groove. En ellos, se han diseñado novedosas redes de alimentación y sistemas de corrección de fase que proporcionan bajas pérdidas y alta eficiencia.

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Section: Combination With a Leaky-wave Antennamentioning

confidence: 99%

Single-Layer Dual-Band Leaky Wave Antennas Design Methodology with Directivity Control

Memeletzoglou

Rajo‐Iglesias

Blanco

2018

2018 IEEE International Symposium on Antennas and Propagation &Amp; USNC/URSI National Radio Science Meeting

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“…This type of high symmetry, as well as screw symmetry, has been used in microwave structures such as filters, traveling wave tubes, and traveling-wave antennas [23]. Recently, interest in glide symmetry has been resurrected with new and fascinating applications [24], [30], such as widening the bandwidth and increasing the attenuation of holey structures at the stopband, useful for producing cost-effective gap waveguides [31]. There, a glide-symmetric holey electromagnetic bandgap (EBG) structure has been proposed to be used to manufacture low-cost waveguide structures at high frequencies.…”

Section: Introductionmentioning

confidence: 99%

Wide Band Interaction Impedance and Mode Excitation in Glide Symmetric Double Corrugated Waveguides for mm-wave TWTs

Méndez¹,

Saavedra-Melo²,

Rajo‐Iglesias³

et al. 2023

Preprint

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Focusing on traveling wave tube (TWT) applications, the interaction impedance between an electron beam and electromagnetic modes in three distinct, but related, corrugated waveguides that operate at millimeter waves is investigated together with the role of glide symmetry. Two waveguide structures have glide symmetry, and the irreducible Brillouin zone is related to half of the period, leading to a wide band linearity, i.e., nondispersive, property of the dispersion diagram. The investigation of the modes with longitudinal electric field that can be excited shows that the bottom-top glide symmetric corrugated waveguide has a wide band interaction impedance, hence it is a good candidate for millimeter wave TWT amplifiers.

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“…One proposed option is the use of half-height pins 9 to reduce the mechanical fragility due to the height in very high frequencies where pins can be really tiny. Another alternative based on the use of periodic holes in groove gap waveguide has been proposed 10 – 12 . To be rigorous, the holes need a glide-symmetric disposition in two planes to exhibit an entire and wide bandgap in all directions in a plane, otherwise the stop band only happens in one direction as in 13 .…”

Section: Introductionmentioning

confidence: 99%

Ka-band planar slotted waveguide array based on groove gap waveguide technology with a glide-symmetric holey metasurface

Herrán

Brazález

Rajo‐Iglesias

2021

Sci Rep

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The design of a planar slot array in groove gap waveguide technology implemented by glide-symmetric holes as Electromagnetic Band Gap structure is here presented. Despite the advantages of using holes instead of pins in terms of manufacturing simplicity and cost,the larger size of the holes compared to pins needs to be considered when designing slot arrays without grating lobes. A 1 to 4 corporate feed network is designed using this technology as well. Corrugations are included to further reduce the grating lobes. Experimental results support the viability of the proposed concept for designing glide-symmetric planar arrays of any size.

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Periodic Structures With Higher Symmetries: Their Applications in Electromagnetic Devices

Cited by 21 publications

References 72 publications

Single-Layer Dual-Band Leaky Wave Antennas Design Methodology with Directivity Control

Single-Layer Dual-Band Leaky Wave Antennas Design Methodology with Directivity Control

Wide Band Interaction Impedance and Mode Excitation in Glide Symmetric Double Corrugated Waveguides for mm-wave TWTs

Ka-band planar slotted waveguide array based on groove gap waveguide technology with a glide-symmetric holey metasurface

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