Progress on agricultural residue-based microwave absorber: a review and prospects

Pattanayak, Soumya Sundar; Laskar, Shahedul Haque; Sahoo, Swagatadeb

doi:10.1007/s10853-020-05557-8

Cited by 35 publications

(13 citation statements)

References 60 publications

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“…The prominent mechanisms that allow microwave attenuation of conjugated carbon-based materials can be summarized as conductive and polarization losses (Pattanayak et al, 2021;Huynen, 2022). The morphology is the essential factor in tuning the polarization loss characteristics (Peymanfar et al, 2021c).…”

Section: Mechanisms Allowing Microwave Absorption In Conductive Polym...mentioning

confidence: 99%

Recent advances in microwave-absorbing materials fabricated using organic conductive polymers

et al. 2023

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Microwave-absorbing materials are widely utilized in military and civilian applications. Moreover, their environmental potential to refine electromagnetic pollution has promoted their importance. An ideal conjugated organic polymer for use as a microwave-absorbing material should possess high porosity, low density, a long conjugated backbone, a narrow energy band gap, proper conductive and relaxation loss, and vast specific surface area. This review describes the conductive polymer types used as microwave-absorbing material and their composites toward improving microwave-absorbing capability. Additionally, recent developments in synthetic strategies and structural properties of pure carbon-based microwave-absorbing materials and other conjugated structures having heteroatoms in their chains are discussed. In the field of microwave absorbers, the predominant microwave-absorbing mechanisms among conductive polymers and their composites as well as the special mechanisms for tuning microwave-absorbing characteristics, including metamaterial and quasi-antenna features, are dissected. This review sheds new light on architecting low-density and high-performance microwave-absorbing structures and offers new prospects in tailoring conjugated polymers based on their dominant mechanisms.

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Section: Mechanisms Allowing Microwave Absorption In Conductive Polym...mentioning

confidence: 99%

Recent advances in microwave-absorbing materials fabricated using organic conductive polymers

et al. 2023

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“…Pyramidal absorbers come in different types, such as twisted pyramidal, hollow pyramidal, wedge pyramidal, and oblique pyramidal. [ 30 ] The combination of the absorber geometry and material properties allows for the efficient absorption of EMWs. The pyramidal absorber can achieve an outstanding reflectivity (greater than 50 dB) over broadband frequencies and wide‐angle changes.…”

Section: Classifications Of Electromagnetic Absorbersmentioning

confidence: 99%

Theory, Modeling, Measurement, and Testing of Electromagnetic Absorbers: A Review

Abu Sanad,

Mahmud,

Ain

et al. 2023

Physica Status Solidi (a)

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In the era of the fifth generation (5G) and the Internet of Things (IoT), electromagnetic interference (EMI) poses a significant challenge. The rapid growth of wireless communication applications leads to increased electromagnetic (EM) pollution, which can have adverse health effects. To address this issue, electromagnetic absorbers (EMAs) play a critical role in eliminating EMI and reducing EM pollution between electronic devices. The focus is now on developing diverse microwave absorbing materials (MAMs) with different structures to cover a wide range of frequencies while remaining cost‐effective and effective at high angles of incidence radiation. This article comprehensively reviews EMAs, highlighting their design parameters and importance in achieving high‐efficiency absorption. The review covers absorber theory, structure, materials for various frequency ranges, and the mechanisms responsible for dissipating electromagnetic waves (EMWs). Analytical and numerical methods for modeling and analyzing EMAs are discussed, along with performance indicators and testing methods. The role of absorbers in different applications is explored, and emerging research directions for enhancing microwave absorbers are also highlighted.

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“…In the prevailing scientific framework, it is conventionally posited that microwaves become entrapped within a film through recurrent reflections and are subsequently absorbed due to the inherent attenuation properties of the material [1][2][3][4][5][6][7][8][9][10][11][12]. However, our previous theoretical investigations, underpinned by the principles of wave superposition within the realm of fundamental physics, have substantiated an alternative perspective [13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Wave Mechanics of Microwave Absorption Films: Part 1 - Insights and Review

Liu,

Drew

2023

Preprint

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Based on transmission line theory, it has been established that the mechanism governing microwave absorption in films differs from that observed in their constituent materials. This fundamental distinction, though straightforward, remains a point of contention within the research community. The prevailing argument posits that microwaves become entrapped through successive reflections within the film, subsequently being absorbed along a zigzag trajectory within the material. As a result, some researchers argue against any distinction between film and material. Their stance is underpinned by their conviction that the existing microwave absorption theory garners robust support from experimental data. However, Part 1 of this study endeavors to demonstrate that these empirical observations can be reinterpreted with greater accuracy by recognizing the pivotal role of the film. This role will receive further exploration from a fresh perspective in Part 2, where disparities between films and their constituent materials will be examined, and in Part 3, dedicated to the design of multilayer films. The key features of the novel wave mechanics theory, which unveil new principles in film physics, have been examined.

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Progress on agricultural residue-based microwave absorber: a review and prospects

Cited by 35 publications

References 60 publications

Recent advances in microwave-absorbing materials fabricated using organic conductive polymers

Recent advances in microwave-absorbing materials fabricated using organic conductive polymers

Theory, Modeling, Measurement, and Testing of Electromagnetic Absorbers: A Review

Wave Mechanics of Microwave Absorption Films: Part 1 - Insights and Review

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