Broadening the absorption bandwidth of metamaterial absorber by coupling three dipole resonances

Vu, Dinh Qui; Le, Dinh Hai; Dinh, Hong Tiep; Trinh, Thi Giang; Yue, Liyang; Le, Dac Tuyen

doi:10.1016/j.physb.2017.03.046

Cited by 23 publications

(4 citation statements)

References 16 publications

(17 reference statements)

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“…A lot of researchers have tried to solve this bandwidth-thickness problem. Combining different resonant units together horizontally [3] or vertically [28], using highly absorbent materials [34], incorporating lumped circuit elements in the structure [55], utilizing high loss materials [57], including resistive films [58], using magnetic medium substrate [59] etc. are some of the approaches proposed to tackle such problem.…”

Section: Issues Of Bandwidth and Thicknessmentioning

confidence: 99%

“…These characteristics are conceived due to their structure rather than the constitution of the material. The unusual characteristics of the MMs depend on the shape, size, and geometry of the structure instead of their constitution [3]. Numerous exotic characteristics of MM have already been revealed, studied, and implemented in various sectors [4–15].…”

Section: Introductionmentioning

confidence: 99%

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The quest for perfect electromagnetic absorber: a review

Tirkey

Gupta

2018

Int. J. Microw. Wireless Technol.

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This paper specifies a concise review of recent research and development in the context of electromagnetic absorbers. An attempt has been made to justify the need for economical and thin microwave absorbers for achieving good absorption characteristics over a wide range of frequencies within a specified band of electromagnetic spectrum. This paper mainly focuses on the challenges encountered while designing a perfect electromagnetic absorber which can absorb electromagnetic radiations of any polarization that may appear from any direction and may occur over a broader bandwidth. The absorbers which are competent enough to withstand all these challenges are capable to suppress the reflection and transmission of unknown electromagnetic radiations efficiently to the lowest possible level. Several prospects of nanotechnology in flexible absorber design are also described to enhance absorber characteristics. This paper also provides a futuristic glimpse on several applications of such absorbers for commercial and military purposes.

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Section: Issues Of Bandwidth and Thicknessmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The quest for perfect electromagnetic absorber: a review

Tirkey

Gupta

2018

Int. J. Microw. Wireless Technol.

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“…Viet et al [ 16 ] used the same idea with a dish shape resonator; a total absorption was obtained for 1.8 GHz bandwidth in the microwave region between 13.7 and 15.5 GHz. Open rings and dishes have been combined as one resonator in [ 43 ], while using different dimensions; thus, the absorption was increased (higher than 80%) for frequencies between 13.5 and 16.5 GHz.…”

Section: Introductionmentioning

confidence: 99%

Toward an Ultra-Wideband Hybrid Metamaterial Based Microwave Absorber

et al. 2020

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In this paper, we propose a novel design of an ultra-wideband hybrid microwave absorber operating in the frequency range between 2 GHz and 18 GHz. This proposed hybrid absorber is composed of two different layers that integrate a multiband metamaterial absorber and a lossy dielectric layer. The metamaterial absorber consists of a periodic pattern that is composed of an arrangement of different scales of coupled resonators and a metallic ground plane, and the dielectric layer is made of epoxy foam composite loaded with low weight percentage (0.075 wt.%) of 12 mm length carbon fibers. The numerical results show a largely expanded absorption bandwidth that ranges from 2.6 GHz to 18 GHz with incident angles between 0° and 45° and for both transverse electric and transverse magnetic waves. The measurements confirm that absorption of this hybrid based metamaterial absorber exceeds 90% within the above-mentioned frequency range and it may reach an absorption rate of 99% for certain frequency ranges. The proposed idea offers a further step in developing new electromagnetic absorbers, which will impact a broad range of applications.

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“…So, it is necessary to employ some technique that makes possible to turn the square spiral-based absorber into a broadband one. To fulfill this requirement, cuts are introduced into the spiral in order to provide a redistribution of charges, and, thus, creating more electric and magnetic dipoles, and a broadening in the absorption bandwidth can be achieved [51]. Figure 4.4 shows the proposed metamaterial absorber, in which the gaps are on the same line segment and α is the rotation angle of the line in which the gaps are placed.…”

Section: Parametric Approachmentioning

confidence: 99%

An Ultrawideband Metamaterial Absorber and a Parameter Retrieval Method

ARAUJO¹

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To begin with, I would like to thank my mother, Geilda Moura, for the support, love, and words of wisdom. I would like to express my sincere gratitude to my advisor, Professor Glaucio Siqueira, for the enthusiasm, personality and guidance without which this journey would have been quite harder. I also would like to thank Professor Marbey Mosso, for many discussions on electromagnetism and life, and also for the valuable advices. I would like to thank Bianca Campinho, for the encouragement and unmeasurable contributions to this work. I am grateful to the professors Cynthia Junqueira, Mauricio Weber and Erich Kemptner for their helpful contributions and many technical suggestions. I would like to thank my lab colleagues and friends Julio Acosta, Yoiz Nuñez, and Johnes Ricardo for all support. I thank PUC-Rio for the scholarship, financial support, and infrastructure granted to me. This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior-Brasil (CAPES)-Finance Code 001. Finally, I would like to thank my family and friends for all support.

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Broadening the absorption bandwidth of metamaterial absorber by coupling three dipole resonances

Cited by 23 publications

References 16 publications

The quest for perfect electromagnetic absorber: a review

The quest for perfect electromagnetic absorber: a review

Toward an Ultra-Wideband Hybrid Metamaterial Based Microwave Absorber

An Ultrawideband Metamaterial Absorber and a Parameter Retrieval Method

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