A new compact dual-band perfect absorption ultrathin planar metasurface energy harvester in X- and V-bands with a wide incident angle

Ghaneizadeh, Alireza; Mafinezhad, Khalil; Joodaki, Mojtaba

doi:10.1063/5.0012857

Cited by 16 publications

(9 citation statements)

References 37 publications

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“…The free space measurement method was employed to assess the absorption performance of the MPA structure. In this method, a planewave, in a normal incidence or an oblique angle, is used to excite uniformly the unit-cells of the metasurface absorber 51 . Although a nearly perfect absorption was achieved with the proposed unit-cell (Fig.…”

Section: Resultsmentioning

confidence: 99%

An ultra-thin double-functional metasurface patch antenna for UHF RFID applications

Koohestani

Ghaneizadeh

2021

Sci Rep

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An ultra-thin double-functional metasurface patch antenna (MPA) was proposed, where it can operate not only in the antenna mode but also can simultaneously act as perfect absorber for normal incident waves, suitable for RFID applications in the 868 MHz band. The MPA structure consists of a typical coaxially-fed patch antenna merged, for the first time, with a metasurface absorber acting as artificial ground. A methodology for the unit-cell design of the metasurface is proposed followed by an equivalent circuit model analysis, which makes it possible to transform a low-loss ($$tan\delta =0.0015$$ t a n δ = 0.0015 ) unit-cell with highly-reflective characteristics to a perfect absorber for normal incident waves. It is based on modifying the critical external coupling by properly introducing slits on the unit-cell, allowing to design an ultra-thin ($$\lambda _0/225$$ λ 0 / 225 at 868 MHz) and a very compact structure in comparison to previously developed designs. For validation purposes, the MPA was fabricated and its performances in both functional modes were characterized numerically and experimentally. It is demonstrated that merging the absorber with the patch not only allows obtaining a well-matched ($$|S_{11}|<-30$$ | S 11 | < - 30 dB) antenna with an enhanced gain (by 175.6% compared to a typical patch) at the desired frequency but also leads to an overall thickness of only 2.5 mm ($$\lambda _0/138.1$$ λ 0 / 138.1 at 868 MHz). With an absorber size limited to the MPA dimensions, a reasonable 1.3 dB reduction in powers reflected by the MPA was achieved compared to a similar size metallic sheet. Whilst having the lowest profile among the so far reported RFID readers, the proposed MPA can be conveniently fitted for example within the required volume of smart shelf RFID readers or used in portable RFID readers while being capable of mitigating multipath reflection issues and incorrect reading of RFID.

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Section: Resultsmentioning

confidence: 99%

An ultra-thin double-functional metasurface patch antenna for UHF RFID applications

Koohestani

Ghaneizadeh

2021

Sci Rep

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“…The subwavelength meta-atoms, scattering particles of metamaterial often periodically embedded in a host medium, can be designed in different ways, resulting in extreme wave manipulation performance [2], [6]- [13]. Due to the lower loss, profile size and several fabrication challenges of voluminal metamaterials, the two-dimensional counterparts, or planar versions of the metamaterials, termed metasurfaces, with subwavelength thickness are often employed.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the lower loss, profile size and several fabrication challenges of voluminal metamaterials, the two-dimensional counterparts, or planar versions of the metamaterials, termed metasurfaces, with subwavelength thickness are often employed. The metasurfaces are artificial electromagnetic surfaces whose thickness is infinitesimal in comparison with the operating wavelength [2], [6]- [14]. Dipolar approximations are the basis of most of the modeling and design techniques used for the analysis and synthesis of metasurfaces [15].…”

Section: Introductionmentioning

confidence: 99%

Generalized Sheet Transition Conditions (GSTCs) in Electromagnetic Metasurface Modeling

Ghaneizadeh,

Joodaki

2024

IEEE Access

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We present a modeling framework for metasurfaces illuminated by a plane wave based on the Generalized Sheet Transition Conditions (GSTCs). This framework describes how conventional boundary conditions are converted to GSTCs. In order to provide a physical insight into the induced dipole moments of simple small scatters, different snapshots are used when the maximum electric or maximum magnetic field touches the metasurface. The spatial derivatives of the normal components of the induced surface polarization densities are physically justified by considering all possible cases. It is shown that both the normal and transverse components of the electric surface polarization density and surface magnetization (magnetic polarization) density should be included in studying the most general case in the metasurface. In addition, we have reviewed three different modeling approaches for describing the GSTCs, which are polarizability, susceptibility, and impedance/admittance models. The interrelations between these approaches are also discussed. Finally, we have reviewed the generalized modeling approaches of GSTCs for synthesizing bianisotropic metasurfaces via all three mentioned models. This review provides several examples to demonstrate how to design a desired metasurface using GSTCs. This tutorial study may open new paradigms for a better modeling and conceptual understanding of GSTCs.

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“…In 2012, Ramahi et al proposed the concept of the EHM with three typical unit structures: split-ring resonator, electric inductive-capacitive and complementary split-ring resonator [7][8][9]. Based on these three basic structures, more novel structures have been proposed to efficiently harvest EM waves with different frequency bands, polarization angles and incident angles [10][11][12][13][14][15][16][17][18][19]. In practical application, WEH technology not only needs to achieve efficient energy harvesting by EHM, but also needs to consider the gathering and rectification of the captured alternating current (AC) energy.…”

Section: Introductionmentioning

confidence: 99%

Polarization-insensitive and wide-angle metasurface to harvest dual-band energy in an ISM band

Huang¹,

Liu²,

Liu³

et al. 2023

J. Phys. D: Appl. Phys.

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We report a novel dual-band metasurface structure to harvest electromagnetic energy in the environment efficiently. The unit structure comprises the complementary improved Jerusalem cross on F4B substrate, a centrosymmetric structure exhibits excellent stability under different polarization and incidence angles at ISM band (2.45GHz and 5.8GHz). Numerical simulation validates that the dual-band, polarization-insensitive and wide-angle energy harvesting of the metasurface array constructed by the composite structure. The energy harvested by the array is guided to the back side through the designed metallic vias and collected by the dual-band differential input power combiner. The experimental results demonstrate that the metasurface array can achieve the peak energy harvesting efficiency of 91.6% and 94.9% under TE and TM polarization.

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A new compact dual-band perfect absorption ultrathin planar metasurface energy harvester in X- and V-bands with a wide incident angle

Cited by 16 publications

References 37 publications

An ultra-thin double-functional metasurface patch antenna for UHF RFID applications

An ultra-thin double-functional metasurface patch antenna for UHF RFID applications

Generalized Sheet Transition Conditions (GSTCs) in Electromagnetic Metasurface Modeling

Polarization-insensitive and wide-angle metasurface to harvest dual-band energy in an ISM band

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