Design of multi-layer mantle cloaks

Monti, Alessio; Tenuti, L.; Oliveri, Giacomo; Alù, Andrea; Massa, Andrea; Toscano, Alessandro; Bilotti, Filiberto

doi:10.1109/metamaterials.2014.6948651

Cited by 15 publications

(9 citation statements)

References 8 publications

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“…The use of nonlinear metasurfaces, sensitive to the level of the impinging power, allows discriminating the antenna response depending on the specific applications. Further improvements of the performance of these devices in terms of scattering suppression, maximum size of the concealed object and operation bandwidth may be achieved by relying on high-order metasurfaces [51], [52] or multilayer cloaks [53], [54]. Fig.…”

Section: B Power-dependent Antennasmentioning

confidence: 99%

Intelligence Enabled by 2D Metastructures in Antennas and Wireless Propagation Systems

Barbuto

Hamzavi-Zarghani

Longhi

et al. 2022

IEEE Open J. Antennas Propag.

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The development of the next generation of wireless systems is bringing renewed attention to the physical layer of the communication link. Indeed, the new low-latency requirements cannot be satisfied relying only upon the extreme virtualization of the hardware functions. Moreover, conventional wireless systems with fixed characteristics and functionalities are not appropriate to modern electromagnetic environments, which undergo continuous and fast variations. Embedded smartness is a required feature for widening the range of the possible electromagnetic responses to support advanced and novel functionalities. In this paper, we show how the combination of 2D metastructures with conventional antennas and reflectors enables an unprecedented electromagnetic behaviour, which is at the basis of new properties, capabilities, and applications. In particular, we propose an emerging design approach based on the shifting of the reconfigurability, adaptivity, sensing, and power management of a wireless system at the physical level, thanks to the use of properly designed 2D metastructures to be coupled with standard antennas and reflectors.

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Section: B Power-dependent Antennasmentioning

confidence: 99%

Intelligence Enabled by 2D Metastructures in Antennas and Wireless Propagation Systems

Barbuto

Hamzavi-Zarghani

Longhi

et al. 2022

IEEE Open J. Antennas Propag.

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“…Since the scattering from an object is the result of the superimposition of several modes whose amplitude is directly related to object size so a single layer mantle cloak is only able to properly suppress the scattered fields of the dominant mode, but using optimised engineered multi‐layered metasurfaces we can suppress several modes contributing to the scattering from a given target and reduce the observability of objects that cannot be considered electrically small [23]. We consider an infinitely long PEC cylinder similar to the cylinder shown in Fig.…”

Section: Multi‐layer Mantle Cloakmentioning

confidence: 99%

Scattering suppression and cloak for electrically large objects using cylindrical metasurface based on monolayer and multilayer mantle cloak approach

Younesiraad

Bemani

Nikmehr

2019

IET Microwaves Antenna & Prop

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The authors proposed analytical models applicable to monolayer and multilayer mantle cloaks for suppressing the scattering fields of electrically large conducting objects using printed ultrathin metasurfaces. To analyse the proposed structure, the two‐sided impedance surface method is used and the scattering cross section (SCS) is obtained using Mie theory. It is shown that using surface impedance expression obtained from the analytical model for monolayer mantle cloak they can design a proper unit cell of a metasurface to reduce significantly total scattering from the cylinder. The proposed mantle cloaks in this work are mainly designed to minimise simultaneously several scattering multi‐poles of a relatively large object around considerably broad bandwidth. Numerical results and full‐wave simulation show good cloaking performance in designed frequency. The simulated results using their analytical models as well as the full‐wave results show that the multilayer mantle cloak is an optimised candidate for cloaking of electrically large objects. The proposed multilayer mantle cloak confirms 3.6 dB SCS gain to cancel the scattering fields of a perfect electric conductor cylinder with a radius of 1.425λ0 at the designed frequency. Finally, they consider a cluster of closely spaced and overlapping three cloaked cylinders for suppression of electromagnetic fields.

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“…In fact, the scattering cancellation technique is not well suited for very large object compared to the operative wavelength since the number of scattering modes that come into play in the description of the scattering response of the object rapidly increases with the size of the object itself [49][50][51][52][53]. Although multi-layered cloaks aiming at minimizing the contribution of each scattering mode for each layer can be exploited [54][55][56][57], for electrically large objects the complexity of the design of the cloak drastically increases, as well the complexity of the analytical models due to the mutualcoupling between the metasurface layers [55].…”

Section: Introductionmentioning

confidence: 99%

Progress and perspective on advanced cloaking metasurfaces: from invisibility to intelligent antennas

et al. 2021

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Among the different cloaking applications proposed in the literature, the antenna framework has emerged as one of the most fruitful and mature field. In particular, mantle cloaking approach has proven to be a powerful tool for enabling unprecedented possibilities in antenna design. Here, we provide a review of the most significant works in the field of electromagnetic invisibility for antenna applications, demonstrating the versatility of cloaking metasurfaces in antenna scenarios. We also discuss our recent results and investigations on the design of advanced cloaking metasurfaces equipped with electronic components and circuits and able enriching the antenna intelligence.

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Design of multi-layer mantle cloaks

Cited by 15 publications

References 8 publications

Intelligence Enabled by 2D Metastructures in Antennas and Wireless Propagation Systems

Intelligence Enabled by 2D Metastructures in Antennas and Wireless Propagation Systems

Scattering suppression and cloak for electrically large objects using cylindrical metasurface based on monolayer and multilayer mantle cloak approach

Progress and perspective on advanced cloaking metasurfaces: from invisibility to intelligent antennas

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