scholarly journals A versatile smart transformation optics device with auxetic elasto-electromagnetic metamaterials

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Dongheok Shin ◽  
Yaroslav Urzhumov ◽  
Donghwan Lim ◽  
Kyoungsik Kim ◽  
David R. Smith
Keyword(s):  
Transformation Optics ◽  
Electromagnetic Metamaterials

Quasi-conformal transformation optics with elasto-electromagnetic metamaterials: Design algorithm

2015 ◽  
Vol 107 (2) ◽  
pp. 021908 ◽  
Author(s):  
Dongheok Shin ◽  
Junhyun Kim ◽  
Ilsung Seo ◽  
Kyoungsik Kim
Keyword(s):  
Conformal Transformation ◽  
Transformation Optics ◽  
Design Algorithm ◽  
Electromagnetic Metamaterials

Metamaterials

2021 ◽  
pp. 114-124
Author(s):  
Adrian P Sutton
Keyword(s):  
Electromagnetic Wave ◽  
Strong Coupling ◽  
Incident Wave ◽  
Seismic Waves ◽  
Negative Refraction ◽  
Ocean Waves ◽  
Transformation Optics ◽  
Coastal Regions ◽  
Structural Units ◽  
Electromagnetic Metamaterials

Metamaterials are composites that have extended the concept of a material. They derive their properties from strong coupling between carefully designed and positioned structural units within them and an incident elastic or electromagnetic wave. They are paragons of materials design. In certain frequency ranges of the incident wave they may display properties that no other materials have ever shown, such as negative refraction. First, an elastic metamaterial demonstrates the principle. Electromagnetic metamaterials have been designed using transformation optics to cloak an object and make it invisible in a certain range of frequencies. The concept of metamaterials has been applied to protect cities and coastal regions from seismic waves and ocean waves.

scholarly journals Calculating millimeter-wave modes of copper twisted-pair cables using transformation optics

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Ali Mohajer Hejazi ◽  
Gert-Jan Stockman ◽  
Yannick Lefevre ◽  
Vincent Ginis ◽  
Werner Coomans
Keyword(s):  
Millimeter Wave ◽  
Transformation Optics ◽  
Twisted Pair ◽  
Wave Modes

scholarly journals H-plane horn antenna with enhanced directivity using conformal transformation optics

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hossein Eskandari ◽  
Juan Luis Albadalejo-Lijarcio ◽  
Oskar Zetterstrom ◽  
Tomáš Tyc ◽  
Oscar Quevedo-Teruel
Keyword(s):  
Conformal Transformation ◽  
Phase Error ◽  
Three Dimensional ◽  
Physical Space ◽  
Horn Antenna ◽  
High Gain ◽  
Transformation Optics ◽  
Graded Index ◽  
Low Profile ◽  
Dielectric Lens

AbstractConformal transformation optics is employed to enhance an H-plane horn’s directivity by designing a graded-index all-dielectric lens. The transformation is applied so that the phase error at the aperture is gradually eliminated inside the lens, leading to a low-profile high-gain lens antenna. The physical space shape is modified such that singular index values are avoided, and the optical path inside the lens is rescaled to eliminate superluminal regions. A prototype of the lens is fabricated using three-dimensional printing. The measurement results show that the realized gain of an H-plane horn antenna can be improved by 1.5–2.4 dB compared to a reference H-plane horn.

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