Multilayer homogeneous dielectric filler for electromagnetic invisibility

Serna, Alberto; Molina, Luis J.; Rivero, J.; Landesa, L.; Taboada, J. M.

doi:10.1038/s41598-018-32070-5

Cited by 5 publications

(1 citation statement)

References 43 publications

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“…The primary use of mantle cloaking was to hide the passive objects from radiating devices, e.g., radars [21,22] upon reducing or cancelling the scattering of the objects. The scheme was extended to hide larger objects with complicated structures as well using multilayer mantle cloaks [23][24][25][26]. Meanwhile, polarization-sensitive metasurfaces have been used if surfaces behave differently for TE and TM incident waves [27,28].…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of Elliptical Mantle Cloaks for Polarization Decoupling of Two Tightly Spaced Interleaved Co-Frequency Patch Array Antennas

Masoumi

Kazemi

Fathy

2022

Preprint

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In this paper, the method of mantle cloaking is utilized to decouple/isolate two densely interleaved patch array antennas operating at the same frequency but with orthogonal polarizations. To reduce the mutual coupling between the adjacent elements, vertical strips, as a type of elliptical mantle cloaks, are located at close proximity to the patches. At the operating frequency of f0 = 3.7 GHz, the edge-to-edge spacing of the elements of the two interleaved arrays is less than λ0/80 (1 mm) and the center–to-center spacing of each array elements is 0.7 λ0 (57 mm). The proposed design is implemented using 3D printing technology, and its performance in terms of return loss, efficiency, gain, radiation patterns, and isolation is measured for evaluation. The results show the radiation characteristics of the arrays are perfectly retrieved after cloaking similar to the isolated arrays. Decoupling of tightly spaced patch antenna arrays on a single substrate paves the way to achieve miniaturized communication systems with full duplex operation or dual polarization communication.

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Section: Introductionmentioning

confidence: 99%

Design and Implementation of Elliptical Mantle Cloaks for Polarization Decoupling of Two Tightly Spaced Interleaved Co-Frequency Patch Array Antennas

Masoumi

Kazemi

Fathy

2022

Preprint

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Omnidirectional acoustic cloaking against airborne sound realized by a locally resonant sonic material

Matsushima

Noguchi

Yamada

2022

Sci Rep

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We report that a locally resonant sonic material realizes omnidirectional acoustic invisibility in air. To achieve acoustic cloaking in the low-frequency regime, we axisymmetrically placed elastic rods comprised of silicone rubber and lead around a cloaked object. The radii of the rods are designed to minimize their total scattering cross section for a given frequency. The optimization is performed using an algorithm incorporating multiple scattering theory and gradient-based nonlinear programming. We numerically confirmed that the designed cloaking device suppressed the scattering cross section by almost 92% for all incident directions at the target frequency.

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Design and implementation of elliptical mantle cloaks for polarization decoupling of two tightly spaced interleaved co-frequency patch array antennas

Masoumi

Kazemi

Fathy

2023

Sci Rep

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In this paper, we utilized the method of mantle cloaking to decouple/isolate two densely packed interleaved patch array antennas operating at the same frequency but with orthogonal polarizations. To reduce mutual coupling between the adjacent elements, vertical strips, as a type of elliptical mantle cloaks, are located in close proximity to the patches. At the operating frequency of f0 = 3.7 GHz, the edge-to-edge spacing of the elements of the two interleaved arrays is less than λ0/80 (1 mm) and the center-to-center spacing of each array element is 0.7 λ0 (57 mm). The proposed design is implemented using 3D printing technology, and its performance in terms of return loss, efficiency, gain, radiation patterns, and isolation is measured for evaluation. The results show the radiation characteristics of the arrays are perfectly retrieved after cloaking similar to the isolated arrays. Decoupling tightly spaced patch antenna arrays on a single substrate paves the way to achieve miniaturized communication systems with full duplex operation or dual polarization communication.

show abstract

Multilayer homogeneous dielectric filler for electromagnetic invisibility

Cited by 5 publications

References 43 publications

Design and Implementation of Elliptical Mantle Cloaks for Polarization Decoupling of Two Tightly Spaced Interleaved Co-Frequency Patch Array Antennas

Design and Implementation of Elliptical Mantle Cloaks for Polarization Decoupling of Two Tightly Spaced Interleaved Co-Frequency Patch Array Antennas

Omnidirectional acoustic cloaking against airborne sound realized by a locally resonant sonic material

Design and implementation of elliptical mantle cloaks for polarization decoupling of two tightly spaced interleaved co-frequency patch array antennas

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