Broadband anomalous reflection based on gradient low-Q meta-surface

Pu, Mingbo; Chen, Po; Wang, Changtao; Wang, Yanqin; Zhao, Zeyu; Hu, Chenggang; Huang, Cheng; Luo, Xiangang

doi:10.1063/1.4809548

Cited by 92 publications

(15 citation statements)

References 24 publications

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“…As an attempt to increase the energy efficiency and bandwidth, we presented an efficient approach, as depicted in Figure 33, to extend the bandwidth of phase modulation by utilizing the broadband characteristic of low-quality factor (Q-factor) metasurface in the reflection mode [177]. The dispersion of the metasurface was engineered to achieve phase modulation within [0, 360 ∘ ].…”

Section: Passive Antenna Array Based On Impedance Transitionmentioning

confidence: 99%

Taming the Electromagnetic Boundaries via Metasurfaces: From Theory and Fabrication to Functional Devices

Luo

et al. 2015

International Journal of Antennas and Propagation

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As two-dimensional metamaterials, metasurfaces have received rapidly increasing attention from researchers all over the world. Unlike three-dimensional metamaterials, metasurfaces can be utilized to control the electromagnetic waves within one infinitely thin layer, permitting substantial advantages, such as easy fabrication, low cost, and high degree of integration. This paper reviews the history and recent development of metasurfaces, with particular emphasis on the theory and applications relating to the frequency response, phase shift, and polarization state control. Based on the current status of various applications, the challenges and future trends of metasurfaces are discussed.

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Section: Passive Antenna Array Based On Impedance Transitionmentioning

confidence: 99%

Taming the Electromagnetic Boundaries via Metasurfaces: From Theory and Fabrication to Functional Devices

Luo

et al. 2015

International Journal of Antennas and Propagation

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“…Thus, the ROGERS 4350C with the largest commercially available thickness of 1.524 mm is chosen in order to increase the dielectric loss for a lower Q [24]. Then, the split resonance ring (SRR) with two gaps shown in Fig 1 (a) is used for our raw unit cell because its quality factor Q over the two resonant bands satisfies the requirement.…”

Section: Design and Analysis Of The Tunable Unit Cellmentioning

confidence: 99%

A Dynamically Phase Tunable Metasurface for a Broad Bandwidth Ultra-Low Radar Cross Section

2020

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An electrically tunable metasurface is designed for radar cross-section (RCS) reduction application in this paper. It consists of 24 × 24 cells individually loaded with variable capacitors so that their phase profiles can be independently controlled by the bias voltage. Therefore, based on the diffusive scattering principle and reflect-array theory, we arrange the adaptive phase differences between adjacent basic elements and reconfigure the appropriate phase distribution determined by a genetic algorithm (GA) corresponding to the operation frequency. Thus, stable monostatic and bistatic RCS reduction with normal incidence can be realized over a wide band by independently tuning the capacitance of each loaded varactor. Simulation results verify that the bistatic RCS reduction can reach at least 10 dBSm within both 4.2-7.3 GHz and 9.3-11.3 GHz. Simultaneously, the monostatic RCS reduction reaches at least 17.5 dBSm and 14 dBSm within the above two bands, respectively. INDEX TERMS Metasurface, radar cross section, varactor tuning.

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“…Following their pioneering work, researchers have devoted extensive efforts into developing reflective metasurfaces with tailored phase distributions for wavefront shaping [22][23][24][25][26][27][28][29]. However, most of the previous investigations focus on the isotropic reflective metasurface, hindering the application of metasurfaces in the manipulation of light with different polarizations.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Microwave Devices for Polarization-Dependent Wavefront Shaping Based on an Anisotropic Metasurface

Guo

2018

Applied Sciences

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Metasurfaces have recently become a promising material, offering new degrees of freedom in molding electromagnetic wave properties. In this work, we propose and numerically investigate ultrathin microwave devices for polarization-dependent wavefront shaping based on an anisotropic metasurface, which consists of a square metal ring with a cross, a dielectric substrate, and a metal ground plane. It is demonstrated the proposed metasurface can independently manipulate reflective x- and y-polarized wavefronts at frequency of 15 GHz via engineering of the metal cross. Furthermore, the reflective efficient is extremely high, reaching a near-unity value of 0.98. Based on this anisotropic metasurface, a polarization beam splitter is achieved by artificially arranging the spatial distribution of metasurfaces with prescribed geometries. In addition, we successfully design a focusing metasurface to separate the x- and y-polarized beams via focusing them at different positions. The proposed approach paves a way toward the applications of the metasurface in a microwave band.

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Broadband anomalous reflection based on gradient low-Q meta-surface

Cited by 92 publications

References 24 publications

Taming the Electromagnetic Boundaries via Metasurfaces: From Theory and Fabrication to Functional Devices

Taming the Electromagnetic Boundaries via Metasurfaces: From Theory and Fabrication to Functional Devices

A Dynamically Phase Tunable Metasurface for a Broad Bandwidth Ultra-Low Radar Cross Section

Ultrathin Microwave Devices for Polarization-Dependent Wavefront Shaping Based on an Anisotropic Metasurface

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