Multiband polarization-insensitive cartwheel metamaterial absorber

Majeed, Khalid; Niazi, Shahab Ahmad; Altıntaş, Olcay; Baqir, M. A.; Karaslaan, M.; Hasar, Uğur Cem

doi:10.1007/s10853-022-07975-2

Cited by 9 publications

(4 citation statements)

References 38 publications

(24 reference statements)

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“…Landy et al2008 [18] produced the concept of the perfect MM absorber with a compact and ultrathin structure, achieving a near-unity absorption by effectively effective impedance matching between the absorber and free space. MM absorbers have been developed in a variety of frequency ranges, including single band [19], [20], dual band [21], [22], and multiband [23]- [25].…”

Section: Introductionmentioning

confidence: 99%

A Wide-Angle, Polarization-Insensitive, Wideband Metamaterial Absorber With Lumped Resistor Loading for ISM Band Applications

Amer,

Sapuan,

Othman

et al. 2024

IEEE Access

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This work introduces a wideband metamaterial (MM) absorber designed to operate effectively across a wide reception angle and be polarization-insensitive within ISM band (2.4 GHz) applications. The proposed absorber unit cell comprises four copper sectors loaded with lumped resistors and a full copper ground plane hosted onto two FR4 substrates. Furthermore, an air layer suspended between the ground plane and a FR4 substrate is applied to achieve wideband absorption. In addition, the simulation results show that particular design factors, such as lumped resistors and unit cell geometry, can be optimized to improve the efficiency of the absorber. The simulations demonstrate that the proposed absorber achieves a wideband absorption, exceeding 90%, over a broad frequency range from 1.94 GHz to 2.98 GHz. The designed absorber was fabricated and tested, and the simulation and measurement results were agreed well.INDEX TERMS Electromagnetic absorber, metamaterial (MM), polarization independent, wideband.

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Section: Introductionmentioning

confidence: 99%

A Wide-Angle, Polarization-Insensitive, Wideband Metamaterial Absorber With Lumped Resistor Loading for ISM Band Applications

Amer,

Sapuan,

Othman

et al. 2024

IEEE Access

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“…The development of frequency selective surface (FSS) technology [6, 7] has boosted the researcher's community in the design of different two-dimensional polarizers for advanced wireless applications [8]. Note that circular polarization (CP) is impervious to the effects like Faraday rotation, multipath fading, and polarization mismatch compared to linear polarization [9].…”

Section: Introductionmentioning

confidence: 99%

Highly miniaturized wideband angular stable linear–circular and linear–cross polarization converter for Ka-band satellite applications

Shukoor

Dey

2023

Int. J. Microw. Wireless Technol.

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This work proposes a novel, extremely miniaturized wideband linear–circular and linear–cross metasurface-enabled reflective polarizer. This design comprises a Meander-line structure with horizontal dipoles as the top frequency selective surface, printed on a 1 mm thin-grounded FR-4 substrate. The x/y-polarized incident electromagnetic wave is converted as circularly polarized from 10.60 to 10.92 GHz (LHCP/RHCP), 12.12 to 17.32 GHz (RHCP/LHCP), and 22.72 to 37.76 GHz (LHCP/RHCP) during reflection with 2.97, 35.33, and 49.74% Fractional Bandwidth (FBW). In addition, this design shows linear–cross conversion with a minimum 90% polarization conversion ratio from 11.41 to 12, 19.01 to 22.34, and 40.74 to 46.82 GHz with an FBW of 5.04, 16.11, and 13.89%. The device performance is considerably stable under different oblique incidences, and the polarizer's unitcell is compact with a structural periodicity of 0.089 × 0.064 $\lambda _L^2$ , and ultra-thin low-profile substrate thickness of 0.035λL. The proposed prototype is fabricated, and the measured results are in good agreement with the simulated one. This article also mentions how this polarizer could be tuned for dual-band K- and Ka-band satellite applications. The authors believe that the design's novelty lies in the multiband conversion with circular-polarization orthogonality, a highly miniaturized unitcell's volume of 0.199 $\lambda _L^3$ /1000, and better angular stability made this design a potential candidate for real-time satellite applications.

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“…The distance between array elements is smaller compared to conventional antenna arrays. The concept of the MS harvesters is similar to that of the MS absorbers, except that the absorbed power is dissipated in the substrate material [19][20][21][22][23], while in the MS harvesters, the absorbed energy is directed to the rectifier circuit. In the MS harvester design, the input impedance of each harvester is modelled by the grounded resistive load and it should be matched well to the impedance of free space to achieve higher efficiency.…”

Section: Introductionmentioning

confidence: 99%

High-efficiency electromagnetic energy harvesting using double-elliptical metasurface resonators

Amer,

Othman,

Sapuan

et al. 2023

PLoS ONE

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This study introduces a metasurface (MS) based electrically small resonator for ambient electromagnetic (EM) energy harvesting. It is an array of novel resonators comprising double-elliptical cylinders. The harvester’s input impedance is designed to match free space, allowing incident EM power to be efficiently absorbed and then maximally channelled to a single load through optimally positioned vias. Unlike the previous research works where each array resonator was connected to a single load, in this work, the received power by all array resonators is channelled to a single load maximizing the power efficiency. The performance of the MS unit cell, when treated as an infinite structure, is examined concerning its absorption and harvesting efficiency. The numerical results demonstrate that the MS unit cell can absorb EM power, with near-perfect absorption of 90% in the frequency range of 5.14 GHz to 5.5 GHz under normal incidence and with a fractional bandwidth of 21%. The MS unit cell also achieves higher harvesting efficiency at various incident angles up to 60o. The design and analysis of an array of 4x4 double elliptical cylinder MS resonators integrated with a corporate feed network are also presented. The corporate feed network connects all the array elements to a single load, maximizing harvesting efficiency. The simulation and measurement results reveal an overall radiation to AC efficiency of about 90%, making it a prime candidate for energy harvesting applications.

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Multiband polarization-insensitive cartwheel metamaterial absorber

Cited by 9 publications

References 38 publications

A Wide-Angle, Polarization-Insensitive, Wideband Metamaterial Absorber With Lumped Resistor Loading for ISM Band Applications

A Wide-Angle, Polarization-Insensitive, Wideband Metamaterial Absorber With Lumped Resistor Loading for ISM Band Applications

Highly miniaturized wideband angular stable linear–circular and linear–cross polarization converter for Ka-band satellite applications

High-efficiency electromagnetic energy harvesting using double-elliptical metasurface resonators

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