Further investigation on solant–rectenna‐based flexible Hilbert‐shaped metamaterials

Elwi, Taha A.; Abdulqader, Sarah G.

doi:10.1049/iet-nde.2020.0013

Cited by 14 publications

(15 citation statements)

References 24 publications

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“…The antenna based on HSR inclusions contributes the current movement to end of the patch, thereby Reference Dimensions (mm 2 ) Bandwidth (GHz) Max. Gain (dBi) [1] 36 × 28 2.1 GHz-10 GHz 4.3 [4] 44 × 30 1.6 GHz-8.5 GHz 5.1 [5] 34 × 32 3.1 GHz-10 GHz 3.7 [7] 39 × 38 3 GHz-10 GHz 4.4 [11] 40 × 35 2 GHz-10 GHz 4.7 [15] 70 × 70 3 GHz-12 GHz 5.5 [16] 50 × 63 4.2 GHz-6 GHz 3.5 [20] 92. enhancing gain in the end-fire. The most common and effective way to extract the parameters of metamaterial inclusions was employed in [17].…”

Section: Antenna Measurements and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…In [4], a quasi-Yagi antenna that operated from 7.32 GHz to 11.15 GHz of a maximum gain of 8.6 dBi was proposed. Elwi et al [4] designed a complementary antenna by exciting electric and magnetic dipoles; this antenna was revealed to provide reliable gain stability with low back radiation of a wide bandwidth. Several designs in [5][6][7] were developed from different Vivaldi antennas such as spiral loops, magnetic dipoles, H-shaped resonators, and loop-dipole composites.…”

Section: Introductionmentioning

confidence: 99%

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Metamaterial Vivaldi Printed Circuit Antenna Based Solar Panel for Self-Powered Wireless Systems

Abdulmjeed¹,

Elwi²,

Kurnaz³

2021

PIER M

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A high-gain wide-band planar antenna with H-Shaped Resonators (HSRs) for Self-Powered wireless systems is proposed in this paper. The proposed antenna consists of four major parts, namely, a grating Vivaldi electrical dipole, a half-ring magnetic dipole, HSRs, and a solar panel reflector. The dipoles are etched from both antenna substrate sides by each half on one side. The HSR structures are etched on a single side of the used substrate to avoid the capacitive coupling effects which cause the radiation efficiency reduction. HSR inclusions are designed and tested numerically to have the desired electromagnetic properties at frequency band of interest. After introducing the HSR inclusions to the antenna structure, the antenna performance is tested numerically and compared to that without HSR inclusions. The fabricated prototype based HSR structure shows an enhanced gain bandwidth product to cover the frequencies from 1.75 GHz up to 7.43 GHz with a gain varying from 9.52 dBi up to 16.71 dBi over the entire frequency range. Finally, an excellent agreement has been achieved between the gathered numerical results and those from the experimental measurements.

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Section: Antenna Measurements and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Metamaterial Vivaldi Printed Circuit Antenna Based Solar Panel for Self-Powered Wireless Systems

Abdulmjeed¹,

Elwi²,

Kurnaz³

2021

PIER M

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“…This is due to the difficulty of the current motion at the frequency band between 5 GHz and 6 GHz, where the surface wave diffraction from the patch edges becomes significant [6]. Moreover, the electromagnetic aperture of the antenna depends on the slots location with respect to the antenna face center [5]. Also, it is important to mention that the proposed antenna shows excellent stability against bending in terms of gain because of the effects of the ground plane to keep the current distribution constant on the patch surface [1].…”

Section: Bending Effects On the Antenna Performancementioning

confidence: 99%

Flexible Vivaldi Antenna Based on a Fractal Design for Rf-Energy Harvesting

Al-Janabi¹,

Kayhan²

2020

PIER M

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Radio frequency (RF) energy harvesting technologies have attracted different efforts from researchers to employ low energy in powering portable electronic devices. In this article, an Ultra-Wide Band (UWB) antenna based on a Vivaldi fractal antenna backed with a Metamaterial (MTM) array is exemplified for RF-energy harvesting in the modern 5G networks. The antenna is connected to a full wave rectifier circuit to obtain a rectified DC current. It is found that the exemplified antenna provides a maximum output voltage of 1.4 V and 1.3 V at 3.1 GHz and 4 GHz, respectively, when the incident RF power is around 17 Bm. The measured results and simulations show excellent agreement. The antenna is printed on a flexible Kodak photo paper of 0.5 mm thickness with ε r = 2 and loss tangent of 0.0015. The numerical simulations are conducted using CST MWS software package. The proposed antenna structure is fabricated using an ink jet printing technology based on conductive silver nanoparticle ink. Finally, from the obtained measurements after the comparison to their simulations, the proposed antenna covers the frequency band from 2.4 GHz up to 20 GHz with a gain of 1.8 dBi at 3.1 GHz and 4 dBi at 4 GHz. 1. INTRODUCTION Since the concept of metamaterial (MTM) structures was started from the optical domain in 1987 [1] as photonic band gap, they have received a lot of research attention. As of late, an intensive investigation has been applied to the effects on connecting the MTM structures to antenna performance for upgrading their performance [1]. MTM structures are periodic-like layers of exceptional surface wave concealment properties with unique constitutive electromagnetic parameters, permittivity, and permeability, which are not found in nature [2]. Based on their nontraditional electromagnetic properties, MTM structures were classified as: near zero refractive index [3], soft and hard surfaces [4], high-impedance surfaces [5], and artificial magnetic conductors [6]. It is worth to say that a few of these structures have relatively enhanced electromagnetic properties with low material losses [7]. Frequency Selective Surface (FSS) is another category of MTM structures that are periodically layered as dielectric and/or metallic unit cells in different manners [8] with high frequency selectivity. Recently, FSS classifications are defined according to their applications whether as filters [9], artificial magnetic conductors [10], photonic crystals [11], and photonic band gaps [12]. These structures can also be as artificial periodic and non-periodic layers to prevent and/or assist the incident wave propagation [13]. They possess high impedance in both TE and TM modes as found in mushroomlike structures [14], in which an in-phase reflection coefficient can be created [15]. Moreover, soft and hard surfaces operate as FSS structures [16], which include a wide range of applications in the antenna engineering researches and industries.

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“…19 In literature, 20 a single-column Koch fractal electromagnetic bandgap (EBG) structure was proposed to replace the conventional holes etching from ground planes. A self-similar and space-filling property of Koch fractal geometry was used to design a monopole antenna 21 based on a tri-band for MIMO antenna applications. An octagonal-shaped fractal UWB MIMO antenna was presented by applying Minkowski fractal geometry of an octagonal shape to provide excellent miniaturization factor with a bandwidth enhancement.…”

Section: Introductionmentioning

confidence: 99%

A reconfigurable flexible fractal‐based monopole antenna for portable applications

Al-Adhami

Erçelebi

2021

Int J Communication

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Design of a fractal printed circuit antenna structure for portable applications is presented in this paper. The proposed antenna consisted of a modified Hilbert patch printed on a flexible polyamide substrate. The antenna is surrounded with a defected electromagnetic bandgap (EBG) open loop. A parametric study based a numerical analysis is invoked to refine the proposed antenna performance. The proposed antenna is fabricated on polymer substrate with dimensions of 50 Â 60 Â 0.3 mm 3 . The proposed antenna performance is tested experimentally and compared to the simulated results from a commercial software package based on Computer Simulation Technology Microwave Studio (CST MW). The experimental results are found to agree well with simulated results. It is found that the proposed antenna design suites the applications of the frequency bands of UHF and ISM portable systems. The antenna shows two bandwidths from 0.8 to 1 GHz and from 2.3 to 2.6 GHz with average gain of around 3.1 and 7 dBi, respectively. The antenna performances are conducted based on analytical and numerical simulations.The fabricated prototype performances are measured experimentally to show excellent agreement with the simulated results. Finally, it is found that the proposed antenna frequency resonance and bandwidth are insignificantly affected when mounted in close to the human body; therefore, it would be excellent candidate to be in use with biomedical applications.

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Further investigation on solant–rectenna‐based flexible Hilbert‐shaped metamaterials

Cited by 14 publications

References 24 publications

Metamaterial Vivaldi Printed Circuit Antenna Based Solar Panel for Self-Powered Wireless Systems

Metamaterial Vivaldi Printed Circuit Antenna Based Solar Panel for Self-Powered Wireless Systems

Flexible Vivaldi Antenna Based on a Fractal Design for Rf-Energy Harvesting

A reconfigurable flexible fractal‐based monopole antenna for portable applications

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