A compact meander line elliptic split ring resonator based metamaterial for electromagnetic shielding

Ashraf, Farhad Bin; Alam, Touhidul; Kibria, Salehin; Islam, Mohammad Tariqul

doi:10.1166/mex.2018.1419

Cited by 14 publications

(4 citation statements)

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“…Concern about the miniaturization of electronic products and devices have become a new trend in the scientific community. The references [34][35][36][37] have bigger array cells that become a major limitation for the SAR reduction application. Because of this potential restriction, we treat the size miniaturization of the array cell by giving considerable importance during the construction of metamaterial design.…”

Section: Comparison Of Previous Sar Reduction Studiesmentioning

confidence: 99%

Reduction of 5G cellular network radiation in wireless mobile phone using an asymmetric square shaped passive metamaterial design

Ramachandran

Faruque

Siddiky

et al. 2021

Sci Rep

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This study aims to demonstrate the feasibility of metamaterial application in absorption reduction of 5G electromagnetic (EM) energy in the human head tissue. In a general sense, the radio frequency (RF) energy that received by wireless mobile phone from the base station, will emit to surrounding when the devices are in active mode. Since the latest fifth generation technology standard for cellular networks is upon us, the emission of radiation from any wireless devices needs to be taken into consideration. This motivation helps to prepare this paper that focuses on construction of novel and compact square-shaped metamaterial (SM) design to reduce electromagnetic exposure to humans. The commercially available substrate material known as FR-4 with thickness of 1.6 mm was selected to place the metamaterial design on it. The electromagnetic properties and Specific Absorption Rate (SAR) analyses were carried out numerically by utilising high-performance 3D EM analysis, Computer Simulation Technology Studio (CST) software. Meanwhile, for the validation purpose, the metamaterial designs for both unit and array cells were fabricated to measure the electromagnetic properties of the material. From the numerical simulation, the introduced SM design manifested quadruple resonance frequencies in multi bands precisely at 1.246 (at L-band), 3.052, 3.794 (at S-band), and 4.858 (C-band) GHz. However, the comparison of numerically simulated and measured data reveals a slight difference between them where only the second resonance frequency was decreased by 0.009 GHz while other frequencies were increased by 0.002, 0.045, and 0.117 GHz in sequential order. Moreover, the SAR analysis recorded high values at 3.794 GHz with 61.16% and 70.33% for 1 g and 10 g of tissue volumes, respectively. Overall, our results demonstrate strong SAR reduction effects, and the proposed SM design may be considered a promising aspect in the telecommunication field.

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Section: Comparison Of Previous Sar Reduction Studiesmentioning

confidence: 99%

Reduction of 5G cellular network radiation in wireless mobile phone using an asymmetric square shaped passive metamaterial design

Ramachandran

Faruque

Siddiky

et al. 2021

Sci Rep

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“…Meanwhile, Faruque et al. 23 and Ramachandran et al. 24,25 have bigger array cells that become a major limitation for the SAR reduction application.…”

Section: Comparison Of Previous Sar Reduction Studiesmentioning

confidence: 99%

“…Despite the fact that 80% of array cell dimension was reduced when compared to the existing studies, the reduction values are still in an acceptable manner. Meanwhile, Faruque et al 23 and Ramachandran et al 24,25 have bigger array cells that become a major limitation for the SAR reduction application. Besides that, the metamaterial designs proposed in the literature reviews have either single-or double-resonance frequencies only.…”

Section: Comparison Of Previous Sar Reduction Studiesmentioning

confidence: 99%

Dielectric passive left-handed symmetric metamaterial design for electromagnetic absorption reduction application

Ramachandran

Faruque

Islam

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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Electromagnetic exposure became an alarming issue in the 20th century, which has resulted in the creation of shielding metamaterial to reduce the radiation effects from any wireless devices. In this research work, a square-shaped metamaterial structure was designed and numerically simulated using a well-known computer simulation technology microwave studio software. The relationship between human head and cellular phone was explored for L- and S-bands, respectively. The proposed metamaterial design is utilized by placing inside a mobile phone to reduce the electromagnetic effect that is absorbed by the human head. The simulation frequency range is adopted from 1 to 6 GHz where the square-shaped metamaterial manifests resonance frequencies at 1.602 GHz (L-band), 2.712 and 3.888 GHz (S-band). Meanwhile, the specific absorption rate results reveal that the reduction happened approximately 1.591% at L-band, 36.646% and 17.864% at S-band over 1 g of tissue volume. Moreover, the second highest reduction value exhibited at 2.712 GHz for 10 g of tissue volume with 20.077% respectively. Briefly, the findings reveal a strong specific absorption rate reduction accomplishment and the proposed square-shaped metamaterial design believed to be a promising aspect in the telecommunication field.

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“…In military field, electromagnetic shielding [23], [24] and polarization manipulating [25], [26] have always been the hot topic for researcher. For some specific scenarios, when these two functions are both taken into account [27], [28], especially for radome detection, electromagnetic compatibility, electromagnetic interference and anti-interference, and other military fields.…”

Section: And Advancedmentioning

confidence: 99%

A Solid State Plasma Multifunctional Metamaterial and Its Application for Energy Absorbing and Cross Polarization Conversion

Zeng

Tian

et al. 2020

IEEE Access

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With the increasing expectations of electromagnetic devices, the defects of monofunctional devices that are susceptibly limited by external constraints are becoming more and more obvious and the integration of multiple functions has gradually become the pursuit of researchers. In this paper, a novel multifunctional metamaterial tailored by the solid state plasma (SSP) is proposed. By inspiring the particular SSP resonators, such a metamaterial can be handily switched back and forth among two functions and form three working states. When the proposed SSP metamaterial is served in State I, its function embodies as an energy absorber and the absorption which is over 90% for TE and TM modes are 5.84-7.30 GHz and 5.41-6.34 GHz whose relative bandwidths (RBs) are 22.22% and 15.83%, respectively. States II and III keep the same functionality of cross-polarization conversion but a distinct operating band. The polarization conversion rate (PCR) of State II which is higher than 90% is 7.40-12.20 GHz (the RB is 48.98%) and this operational range will be shifted to 5.71-8.47 GHz (the RB is 38.92%) after switching to State III. Compared with the conventional tunable devices, this SSP metamaterial has the advantage of functional diversity and it provides a new design idea of absorber and polarization converter to promote potential applications of multifunctional devices.

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A compact meander line elliptic split ring resonator based metamaterial for electromagnetic shielding

Cited by 14 publications

References 0 publications

Reduction of 5G cellular network radiation in wireless mobile phone using an asymmetric square shaped passive metamaterial design

Reduction of 5G cellular network radiation in wireless mobile phone using an asymmetric square shaped passive metamaterial design

Dielectric passive left-handed symmetric metamaterial design for electromagnetic absorption reduction application

A Solid State Plasma Multifunctional Metamaterial and Its Application for Energy Absorbing and Cross Polarization Conversion

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