Terahertz high and near-zero refractive index metamaterials by double layer metal ring microstructure

Jiang, Li Jun; Fang, Bo; Yan, Zhigang; Fan, Jun; Qi, Cenke; Liu, Jianjun; He, Yingwei; Li, Chenxia; Jing, Xufeng; Gan, Haiyong; Hong, Zhi

doi:10.1016/j.optlastec.2019.105949

Cited by 98 publications

(18 citation statements)

References 38 publications

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“…Moreover, the bandwidth of the antenna was enhanced by minimizing the mutual coupling between two square shaped metal rings printed on opposite sides of the substrate. The bandwidth for the double‐layered printed rings is wider than both metal rings printed on the single side of the substrate 30 …”

Section: Introductionmentioning

confidence: 97%

“…The bandwidth for the double-layered printed rings is wider than both metal rings printed on the single side of the substrate. 30 The proposed metamaterial is based on these works, 29,30 where a double-layer concentric rings metaplate (DLCRM) defined on both sides of a substrate is used for gain enhancement. This paper describes how the gain and bandwidth of the MPA are improved significantly using a novel DLCRM at mmWave.…”

Section: Introductionmentioning

confidence: 99%

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Performance improvement of microstrip patch antenna using a novel double‐layer concentric rings metaplate for 5G millimeter wave applications

Jeong

Hussain

Abbas

et al. 2020

Int J RF Microw Comput Aided Eng

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This paper presents the performance improvement of a microstrip patch antenna (MPA) using a novel double-layer concentric rings metaplate (DLCRM) for fifth-generation (5G) millimeter wave (mmWave) applications. To improve the performance of the proposed antenna, a DLCRM is placed above the MPA having an air gap. The design procedure is explained using the different shapes of DLCRM, and the double negative (DNG) characteristic of metamaterial is verified. Moreover, the effects of the DLCRM on the MPA are validated by experimental results. The proposed antenna attains a high-gain of 11.59 dBi and has an impedance bandwidth from 27.1 GHz to 29.56 GHz (8.68%) which is the potential 5G mmWave band. The measurement result shows that the bandwidth of the antenna is improved by 2.04%, and broadside gain is increased by 4.69 dBi compared to the MPA without a DLCRM. Thus, the antenna provides high gains with wide bandwidth that makes it a suitable candidate for 5G mmWave applications.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Performance improvement of microstrip patch antenna using a novel double‐layer concentric rings metaplate for 5G millimeter wave applications

Jeong

Hussain

Abbas

et al. 2020

Int J RF Microw Comput Aided Eng

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show abstract

“…[24][25][26][27][28][29] According to the principle of phase regulation, phase-type metasurfaces can be roughly classified as transmission phase-, circuit-, or geometric phase-type metasurfaces. [30][31][32][33][34][35][36] We focus on applying the principles of transport and geometric phases to realize the modulation of the wavefront phase and polarization by metasurfaces. The phase difference accumulated during the propagation of light waves in transmission phase metasurfaces DOI: 10.1002/qute.202300124 is primarily used to construct metasurface devices.…”

Section: Introductionmentioning

confidence: 99%

Flexible Control of Phase and Polarization based on All‐Dielectric Metamaterials

Zhang

et al. 2023

Adv Quantum Tech

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A metasurface is a planar structure that can flexibly control the polarization, phase, and amplitude of incident electromagnetic waves. An all‐dielectric hexagonal cell structure to reduce the interaction between cells and achieve efficient parametric regulation of electromagnetic waves is proposed. The single resonant transmission phase and the geometric phase are superimposed to realize the composite phase unit structure and construct a multifunctional flat metasurface device. The designed metasurface can flexibly tune the phase and polarization of incident electromagnetic waves and enable multifunctional integration phenomena, such as polarization separation, light intensity convergence, and vector light generation, on a single metasurface.

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“…Electromagnetic metamaterials are artificially designed structures with sub‐wavelength units smaller than the wavelength in periodic or aperiodic arrangement to achieve electromagnetic properties that cannot be achieved by existing materials in nature. [ 1–10 ] For example, Lai et al. reported triple‐band surface plasmon resonance metamaterial absorber based on open‐ended prohibited sign type monolayer graphene.…”

Section: Introductionmentioning

confidence: 99%

Transmitted Electromagnetic Beam Steering of Pyramid All‐Dielectric Encoding Surface Microstructure

Zhao,

Zhang,

Fang

et al. 2023

Adv Quantum Tech

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A transmission‐type all‐medium element is proposed to construct a coded metasurface. Due to the single‐layer metasurface unit structure, large reflection loss will be caused when the base plane is incident. In order to improve the efficiency of the coded metasurface device and reduce the reflection loss, the authors propose a double‐sided metasurface digital unit structure and introduces a wideband anti‐reflection pyramid microstructure to achieve significantly improved transmission characteristics. The optimized unit structure is coded and the coded metasurface is constructed. Different coding metasurface sequences are constructed based on 1‐bit, 2‐bit, and 3‐bit digital coding units. According to generalized Snell's law, the number of transmitted beams can be controlled. The authors introduce complex code addition theory to construct multifunctional beam control metasurface. Based on the far field scattering theory of metasurface, the addition theory of different sequences of transmission‐coded metasurface is analyzed. The addition operation of the superposition of two sets of symmetric double beams and two sets of ordinary double beams can be realized. Based on the analysis of far‐field scattering characteristics, the multifunctional coded metasurface is demonstrated, that is, multiple functions are simultaneously superimposed in one array without interference.

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Terahertz high and near-zero refractive index metamaterials by double layer metal ring microstructure

Cited by 98 publications

References 38 publications

Performance improvement of microstrip patch antenna using a novel double‐layer concentric rings metaplate for 5G millimeter wave applications

Performance improvement of microstrip patch antenna using a novel double‐layer concentric rings metaplate for 5G millimeter wave applications

Flexible Control of Phase and Polarization based on All‐Dielectric Metamaterials

Transmitted Electromagnetic Beam Steering of Pyramid All‐Dielectric Encoding Surface Microstructure

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