Design and simulation of polarization transformers using transformation electromagnetics

Mousavi, Sayyed Saleh Sayyed; Majedi, Mohammad Saeed; Eskandari, Hossein

doi:10.1016/j.ijleo.2016.11.129

Cited by 15 publications

(3 citation statements)

References 24 publications

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“…It was demonstrated that the hypothetical deformation could be embodied into a material within a physical space using the TO method. TO has been used to create various devices with unique functions, including beam expanders (Rahm et al, 2008;Emiroglu and Kwon, 2010), polarization splitters and transformers (Kwon and Werner, 2008;Mousavi et al, 2017;Eskandari et al, 2018), waveguide couplers (García-Meca et al, 2011;Markov et al, 2012;Eskandari et al, 2017bEskandari et al, ,a, 2019bEskandari and Tyc, 2019), and directivity enhancers (Eskandari et al, 2021a,b;Schmiele et al, 2010;Yao and Jiang, 2011;Gu et al, 2012;Aghanejad et al, 2012;Wu et al, 2013;Giddens and Hao, 2020;Eskandari, 2022;Kadera et al, 2022;Nazarzadeh and Heidari, 2022).…”

Section: Introductionmentioning

confidence: 99%

A reflectionless compact elliptical half Maxwell fish-eye lens designed by transformation optics

Eskandari

2022

Front. Mater.

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A two-dimensional half Maxwell fish-eye lens is compressed using a linear transformation that maps a half circle to a half ellipse. The focusing property of the lens is preserved while making the device more compact. The boundary reflections, investigated for both TE and TM polarizations, were suppressed for beams directed toward the optical axis of the lens. A designed prototype provided a scanning range of ±20° with negligible reflections. The design’s functionality was verified using COMSOL multiphysics.

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Section: Introductionmentioning

confidence: 99%

A reflectionless compact elliptical half Maxwell fish-eye lens designed by transformation optics

Eskandari

2022

Front. Mater.

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“…The most notable one is the invisibility cloak [6,[63][64][65][66][67][68][69][70][71][72]. Furthermore, numerous devices have been designed using TO including polarization splitters [73][74][75][76][77][78], phase transformers [79][80][81], flat lenses [4,[82][83][84][85][86][87][88][89][90][91], field rotators [92,93], field concentrators [94][95][96], waveguide bends [97][98][99] and waveguide couplers [100][101][102][103][104][105][106][107].…”

Section: Introductionmentioning

confidence: 99%

Elliptical generalized Maxwell fish-eye lens using conformal mapping

et al. 2019

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A circular graded index lens is conformally transformed to an elliptical shape using a closed-form transformation. The proposed transformation is then employed to compress a Maxwell fish-eye and its generalized version. Since the transformation is conformal, the electromagnetic properties of the device are perfectly preserved after the transformation with fully isotropic and dielectriconly materials. Ray-tracing and full-wave simulations are carried out for several cases to verify the functionality of the optically transformed lenses in geometrical optics and wave optics regimes.

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“…While two spaces are mathematically similar, they are related by an appropriate coordinate transformation that appears in the various constitutive parameters of medium. The main idea of TO was introduced to design an invisible cloak to hide an object from human view, but later it was utilized to design other electromagnetic devices such as cloaking [3][4][5] , couplers 6,7 , lenses 8,9 , directivity enhancement in antennas, and wave transformer [10][11][12][13][14][15][16] , polarization splitters [17][18][19][20] , beam expander, and beam bends [21][22][23] .…”

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confidence: 99%

Design of a High-performance Flat Reflector Antenna Based on Conformal Transformation Optics

Nazarzadeh

Heidari

2022

Preprint

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In this paper, we design an implementable high-performance flat reflector based on conformal transformation optics. In the proposed 2-dimensional device, the rescaling refractive index approach is applied to overcome the sub-unit refractive index issue, resulting in an all-dielectric isotropic graded-index medium that is physically implementable. Rotating the permeability profile around the antenna axis yields the 3-dimensional profile of the flat reflector construction. The dielectric with continuous refractive index profile is split into eleven layers with a constant refractive index. The proposed antenna requires only dielectric layers with the permittivity of 1.1 to 3.8, making it realizable. Simulation results show that the proposed flat reflector can operate in wide frequency bandwidth. The simulated antenna gain is about 25.27 to 29.55 dBi in the 13-30 GHz frequency range with the side-lobe level below -15 dB. Design and simulation of the proposed antenna are done using COMSOL Multiphysics, and simulation results are validated with CST Studio Suite.

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Design and simulation of polarization transformers using transformation electromagnetics

Cited by 15 publications

References 24 publications

A reflectionless compact elliptical half Maxwell fish-eye lens designed by transformation optics

A reflectionless compact elliptical half Maxwell fish-eye lens designed by transformation optics

Elliptical generalized Maxwell fish-eye lens using conformal mapping

Design of a High-performance Flat Reflector Antenna Based on Conformal Transformation Optics

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