Modified Hexagonal Split Ring Resonator Based on an Epsilon-Negative Metamaterial for Triple-Band Satellite Communication

Afsar, Salah Uddin; Faruque, Mohammad Rashed Iqbal; Hossain, Mohammad Jakir; Khandaker, Mayeen Uddin; Osman, Hamid; Alamri, Sultan

doi:10.3390/mi12080878

Cited by 23 publications

(8 citation statements)

References 23 publications

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“…Recently some chiral metamaterials containing split-ring resonator arrays were designed for telecommunication and spectroscopy applications [19][20][21][22][23][24][25]. The resonator designs are based on metals and those metamaterials work mostly in the gigahertz (GHz) region.…”

Section: Introductionmentioning

confidence: 99%

Graphene-Based Multiband Chiral Metamaterial Absorbers Comprised of Square Split-Ring Resonator Arrays With Different Numbers of Gaps, and Their Equivalent Circuit Model

Asgari

Fabritius

2022

IEEE Access

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The equivalent circuit model (ECM) is developed by using a MATLAB code to analyze graphene-based multi-band chiral metamaterial absorbers composing graphene-based square split-ring resonator arrays in the terahertz (THz) range. The absorbers are simulated numerically by the finite element method (FEM) in CST Software to verify the ECM results. Our introduced multi-band absorbers can be used as suitable platforms in polarization-sensitive devices and systems in the THz range. We have designed four tunable graphene-based chiral metamaterial absorbers containing one, two, three, and four gaps in their arms, respectively. The absorber with one gap has four absorption bands (two for TE and three for TM, one band of both modes approximately overlaps) with absorption > 50%. The absorber with two gaps has three absorption bands (two for TE and two for TM, one band of both modes approximately overlaps). The absorber with three gaps has four absorption bands (three for TE and two for TM, one band of both modes approximately overlaps). The absorber with four gaps has three absorption bands (three for TE and two for TM, two bands of both modes approximately overlap). They work in the 1-5.5 THz with maximum linear dichroism (LD) responses of 98, 99, 89, and 77%, respectively. The designed absorbers are dynamically tunable. Additionally, by a 90• rotation of the incident electromagnetic fields, it is possible to switch between the number and/or location of absorption bands making these absorbers a promising candidate for future THz systems. ECM results are following the FEM ones. The proposed ECM procedure is a simple and fast way to recognize the characteristics of the designed absorbers. Our proposed absorbers could be promising enablers in future THz systems.

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Section: Introductionmentioning

confidence: 99%

Graphene-Based Multiband Chiral Metamaterial Absorbers Comprised of Square Split-Ring Resonator Arrays With Different Numbers of Gaps, and Their Equivalent Circuit Model

Asgari

Fabritius

2022

IEEE Access

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“…MIMO antennas have improved front-to-back ratios due to the compact size of the unit cell, which also improved the proximity of the two antennas (Vishvaksenan et al 2017). A comparative examination of Circular Split Ring Resonators for Mutual Coupling Effect minimization is performed (Afsar et al 2021). A 1x2 patch antenna loaded with a Circular Split Ring Resonator construction is also designed and analyzed.…”

Section: Discussionmentioning

confidence: 99%

Mutual Coupling Reduction in Antenna Arrays using Circular Complementary Split Ring Resonator Metamaterial Structure in Comparison with Non-Metamaterial Antenna Array

2022

pnr

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The aim of this work is to reduce mutual coupling by incorporating circular CSRR into metamaterial structures. Mutual coupling values are measured for different frequencies and the values are compared with the antenna array without the metamaterial structures. Materials And Methods: Mutual coupling in circular-shaped CSRR metamaterial is compared with that of antenna array without metamaterial. Each group has 10 samples. The mutual coupling values are measured by varying the operating frequency. The G power calculation is 0.8. Results: The experimental results indicate a reduced mutual coupling using the circular-shaped CSRR metamaterial in the two element antenna array compared with the non-metamaterial array. The mean mutual coupling in circular CSRR is -14.36 and in the non-metamaterial antenna array, it is -8.73 with the significance p = 0.023. Conclusion: The circular-shaped CSRR metamaterial structure in the two element antenna array exhibits a better reduction in mutual coupling compared to the antenna array without the metamaterial structure.

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“…To analyse the structural characteristics of the proposed unit cell, the reflection ( S 11 ) and transmission ( S 21 ) coefficients are obtained to calculate the permittivity and permeability [ 33 ] and are expressed as follows V 1 = S 11 + S 21 V 2 = −( S 11 − S 21 )

…”

Section: Methodsmentioning

confidence: 99%

A Metamaterial Inspired AMC Backed Dual Band Antenna for ISM and RFID Applications

Najumunnisa

Sastry

Madhav

et al. 2022

Sensors

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This work presents the design and fabrication of a metamaterial-based stimulated dual band antenna on FR4 material (dielectric constant 4.3) to operate in Industrial, Scientific and Medical (ISM) and Radio-frequency Identification (RFID) applications. The antenna model had an overall dimension of 70 × 31 × 1.6 mm3 with etched T-slots and L-slots for dual band resonance. The main objective of this work was to enhance the gain performance characteristic at the selected dual band frequencies of 0.915 GHz and 2.45 GHz. Initially, it achieved a narrow bandwidth of 0.018 GHz with a gain of 1.53 dBi at a lower frequency, and 0.13 GHz of bandwidth featuring 4.49 dBi of gain at a higher frequency. The antenna provided an impedance bandwidth of 2% (0.905–0.923 GHz) and 5% (2.382–2.516 GHz) at two resonating frequencies. The antenna was integrated with a designed novel AMC structure to enhance the gain in CST Microwave Studio software with the finite integration method. The characteristic features of the AMC unit cell were observed at 0.915 GHz and 2.45 GHz frequencies and after antenna integration, the final prototype achieved a gain of 2.87 dBi at 0.915 GHz and 6.8 dBi at 2.45 GHz frequencies.

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Modified Hexagonal Split Ring Resonator Based on an Epsilon-Negative Metamaterial for Triple-Band Satellite Communication

Cited by 23 publications

References 23 publications

Graphene-Based Multiband Chiral Metamaterial Absorbers Comprised of Square Split-Ring Resonator Arrays With Different Numbers of Gaps, and Their Equivalent Circuit Model

Graphene-Based Multiband Chiral Metamaterial Absorbers Comprised of Square Split-Ring Resonator Arrays With Different Numbers of Gaps, and Their Equivalent Circuit Model

Mutual Coupling Reduction in Antenna Arrays using Circular Complementary Split Ring Resonator Metamaterial Structure in Comparison with Non-Metamaterial Antenna Array

A Metamaterial Inspired AMC Backed Dual Band Antenna for ISM and RFID Applications

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