Directive Beam of the Monopole Antenna Using Broadband Gradient Refractive Index Metamaterial for Ultra-Wideband Application

Singha, Rahul; Vakula, D.

doi:10.1109/access.2017.2703876

Cited by 19 publications

(10 citation statements)

References 16 publications

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“…A gain enhancement of 9.5dB over a bandwidth of 5GHz was measured after the lens was placed at a distance of 0.38λ over the vivaldi antenna. A lens composed of thin wires was reported in [83], where several layers were placed in front of a wideband monopole (distance of λ/2 at the center frequency), thus resulting in an additional gain of 5.3dB. A vivaldi antenna was embedded in a parallel-plate waveguide in order to illuminate a half Maxwell's fish-eye lens [84].…”

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confidence: 99%

“…Finally, some of the works associated with the gain enhancement methods along with the corresponding gain improvement and radiator -metasurface distance are summarized in table 2. λ/2 4dB NRZI [76] 0.4λ 10dB AMC [77] λ/8 4dB AMC [78] λ/40 5.7dB AMC [82] 0.38λ 9.5dB GRIN [83] λ/2 5.3dB GRIN Isolation is of great importance for innumerous applications, in which the antenna elements are placed in close proximity either due to the system's design (e.g. typical λ/2 interelement spacing in antenna array configurations) or for minimizing the structure's volume.…”

Section: %mentioning

confidence: 99%

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Metamaterial-Inspired Antennas: A Review of the State of the Art and Future Design Challenges

Milias

Andersen²,

Lazaridis

et al. 2021

IEEE Access

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Metamaterials are artificial structures with the ability of exhibiting unusual and exotic electromagnetic properties such as the realisation of negative permittivity and permeability. Due to their unique characteristics, metamaterials have drawn broad interest and are considered to be a promising solution for improving the performance and overcoming the limitations of microwave components and especially antennas. This paper presents a detailed review of the most recent advancements associated with the design of metamaterial-based antennas. A brief introduction to the theory of metamaterials is provided in order to gain an insight into their working principle. Furthermore, the current state-of-theart regarding antenna miniaturisation, gain and isolation enhancement with metamaterials is investigated. Emphasis is primarily placed on practical metamaterial antenna applications that outperform conventional methods and are anticipated to play an active role in future wireless communications. The paper also presents and discusses various design challenges that demand further research and development efforts.

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Section: %mentioning

confidence: 99%

Section: %mentioning

confidence: 99%

Metamaterial-Inspired Antennas: A Review of the State of the Art and Future Design Challenges

Milias

Andersen²,

Lazaridis

et al. 2021

IEEE Access

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“…In Ref. [ 16 ] a broadband gradient refractive index metamaterial antenna is fabricated on Roger RO4003 material with a compact size of 25 × 28 × 0.787 mm 3 . The GRIN structure is responsible for obtaining an improved gain of 5.3 db in the resonating band.…”

Section: Introductionmentioning

confidence: 99%

Metamaterial inspired square gap defected ground structured wideband dielectric resonator antenna for microwave applications

Raghavendra¹,

Ammal²,

Madhav³

2023

Heliyon

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“…Especially, it may greatly extend capabilities for wave manipulation, such as the transmitted and reflected waves by metamaterials and other media. Metamaterials are artificial materials based on suitably designed arrays of complex inclusions with a strong wave-matter interaction in a range of frequencies [1]- [3]. Introducing time variance into metamaterials opens up new capabilities for novel properties [4], [5].…”

Section: Introductionmentioning

confidence: 99%

A Simulation Technique for Radiation Properties of Time-Varying Media Based on Frequency-Domain Solvers

Zhang

et al. 2019

IEEE Access

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A novel simulation technique is proposed for the radiation properties of time-varying media. This method divides the time-variation process into finite discrete time steps. The radiation field of the media at each instant in time is simulated by using commercially available frequency-domain solvers, and then these results are processed and synthesized to obtain the radiation field of the time-varying media. In other words, by using this technique, the radiation field of the time-varying media can be obtained based on the frequency-domain simulation results. The proposed technique is introduced with a time-varying grating, and the scattered wave and radiation pattern are illustrated. Moreover, an analytical model of the time-varying grating is also introduced to further explore the proposed technique. This simulation technique can be used to analyze many applications such as the radiation properties of time-modulated media, especially spacetime-modulated metamaterials. It fills the gap of existing simulation methods and provides a new way for direct EM simulation of time-varying structures. INDEX TERMS Simulation technique, time-varying media, radiation property, time-domain analysis.

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Directive Beam of the Monopole Antenna Using Broadband Gradient Refractive Index Metamaterial for Ultra-Wideband Application

Cited by 19 publications

References 16 publications

Metamaterial-Inspired Antennas: A Review of the State of the Art and Future Design Challenges

Metamaterial-Inspired Antennas: A Review of the State of the Art and Future Design Challenges

Metamaterial inspired square gap defected ground structured wideband dielectric resonator antenna for microwave applications

A Simulation Technique for Radiation Properties of Time-Varying Media Based on Frequency-Domain Solvers

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