Ultra-wideband, Wide Angle and Polarization-insensitive Specular Reflection Reduction by Metasurface based on Parameter-adjustable Meta-Atoms

Su, Jianxun; Lü, Yao; Zhang, Hui; Li, Zengrui; Yang, Yaoqing; Che, Yongxing; Qi, Kainan

doi:10.1038/srep42283

Cited by 36 publications

(25 citation statements)

References 34 publications

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“…Regarding the tile architecture, the optimization of the dynamic meta-atom design constitutes a notable goal towards maximizing the supported function range of a tile. Ultrawideband meta-atom designs able to interact concurrently with a wide variety of frequencies, e.g., from 1 to 60 GHz, constitute a notable research goal [7]. Formal tile sounding procedures need to be defined, i.e., simulation-based and experimental processes for measuring the supported functions and parameters per tile design.…”

Section: Challenges and Research Directionsmentioning

confidence: 99%

A New Wireless Communication Paradigm through Software-Controlled Metasurfaces

et al. 2018

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Electromagnetic waves undergo multiple uncontrollable alterations as they propagate within a wireless environment. Free space path loss, signal absorption, as well as reflections, refractions and diffractions caused by physical objects within the environment highly affect the performance of wireless communications. Currently, such effects are intractable to account for and are treated as probabilistic factors. The paper proposes a radically different approach, enabling deterministic, programmable control over the behavior of the wireless environments. The key-enabler is the so-called HyperSurface tile, a novel class of planar meta-materials which can interact with impinging electromagnetic waves in a controlled manner. The HyperSurface tiles can effectively re-engineer electromagnetic waves, including steering towards any desired direction, full absorption, polarization manipulation and more. Multiple tiles are employed to coat objects such as walls, furniture, overall, any objects in the indoor and outdoor environments. An external software service calculates and deploys the optimal interaction types per tile, to best fit the needs of communicating devices. Evaluation via simulations highlights the potential of the new concept.

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Section: Challenges and Research Directionsmentioning

confidence: 99%

A New Wireless Communication Paradigm through Software-Controlled Metasurfaces

et al. 2018

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“…To demonstrate the capability of the proposed encryption fashion, without loss of generality, a coding metasurface with 10 × 10 digital supercells (N = 10) and an arbitrary information message of X = {1010101010} is considered. In the first configuration, the information-coding sequence is directly written into the coding metasurface so that it is repeated in each row of the coding matrix 36 . Next, a phase-encoder with five memory registers is initialized with the aforementioned message.…”

Section: Resultsmentioning

confidence: 99%

An Information Theory-Inspired Strategy for Design of Re-programmable Encrypted Graphene-based Coding Metasurfaces at Terahertz Frequencies

Momeni

Rouhi

Rajabalipanah

et al. 2018

Sci Rep

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Inspired by the information theory, a new concept of re-programmable encrypted graphene-based coding metasurfaces was investigated at terahertz frequencies. A channel-coding function was proposed to convolutionally record an arbitrary information message onto unrecognizable but recoverable parity beams generated by a phase-encrypted coding metasurface. A single graphene-based reflective cell with dual-mode biasing voltages was designed to act as “0” and “1” meta-atoms, providing broadband opposite reflection phases. By exploiting graphene tunability, the proposed scheme enabled an unprecedented degree of freedom in the real-time mapping of information messages onto multiple parity beams which could not be damaged, altered, and reverse-engineered. Various encryption types such as mirroring, anomalous reflection, multi-beam generation, and scattering diffusion can be dynamically attained via our multifunctional metasurface. Besides, contrary to conventional time-consuming and optimization-based methods, this paper convincingly offers a fast, straightforward, and efficient design of diffusion metasurfaces of arbitrarily large size. Rigorous full-wave simulations corroborated the results where the phase-encrypted metasurfaces exhibited a polarization-insensitive reflectivity less than −10 dB over a broadband frequency range from 1 THz to 1.7 THz. This work reveals new opportunities for the extension of re-programmable THz-coding metasurfaces and may be of interest for reflection-type security systems, computational imaging, and camouflage technology.

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“…The key of coding metasurface design for RCS reduction is coding sequence, so intelligent optimization algorithms can be used to optimize coding sequence. For example, ergodic algorithm [6], simulated annealing algorithm [7], genetic algorithm [8][9][10], and particle swarm optimization algorithm [11][12][13][14][15] can optimize the coding sequence to achieve RCS reduction. There is room for further improvement in the bandwidth of RCS reduction.…”

Section: Introductionmentioning

confidence: 99%

Small-Size Broadband Coding Metasurface for RCS Reduction Based on Particle Swarm Optimization Algorithm

Hao¹,

Du²,

Zhang³

2019

PIER M

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Radar cross section (RCS) reduction technology has great significance in stealth and other fields. A PSO-FSP algorithm is proposed based on the particle swarm optimization algorithm and the far-field scattering characteristics of coding metasurface to obtain the optimized coding sequence for RCS reduction. According to the principle of coding metamaterial, a 1 bit cell structure is designed. Therefore, a coding metasurface is constructed by arranging the unit cells based on the optimized coding sequence. Simulation results show that, in the case of vertical incidence, compared with metal plates of the same size, the metasurface can achieve more than 10 dB of RCS reduction within the broadband range from 15 GHz to 35 GHz, and the maximum reduction can reach 36 dB. The proposed coding metasurface has been successfully fabricated and measured, and there is a good agreement between simulated and measured results.

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Ultra-wideband, Wide Angle and Polarization-insensitive Specular Reflection Reduction by Metasurface based on Parameter-adjustable Meta-Atoms

Cited by 36 publications

References 34 publications

A New Wireless Communication Paradigm through Software-Controlled Metasurfaces

A New Wireless Communication Paradigm through Software-Controlled Metasurfaces

An Information Theory-Inspired Strategy for Design of Re-programmable Encrypted Graphene-based Coding Metasurfaces at Terahertz Frequencies

Small-Size Broadband Coding Metasurface for RCS Reduction Based on Particle Swarm Optimization Algorithm

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