A Quad-Band and Polarization-Insensitive Metamaterial Absorber with a Low Profile Based on Graphene-Assembled Film

Jin, Shaofen; Zu, Hao-Ran; Qian, Wei; Luo, Kaolin; Yang, Xiao; Song, Rongguo; Xiong, Bo

doi:10.3390/ma16114178

Cited by 7 publications

(1 citation statement)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, GAF is utilized for the design of metasurface absorbers, leveraging the impedance characteristics to enhance absorption losses and improve the efficiency of electromagnetic wave absorption. We develop a GAF periodic surface structurebased four-band metasurface absorber, 47 which exhibits strong electromagnetic interactions with incident waves, resulting in four distinct absorption peaks at different frequencies spanning the C, X, and Ku bands. The absorption efficiency of the GAF absorber surpasses 90%, significantly outperforming metal absorbers with identical structures.…”

Section: Metasurfacementioning

confidence: 99%

Graphene Assembled Films for Radio Frequency and Microwave Technology

Song,

Zhang,

et al. 2024

Acc. Mater. Res.

Self Cite

View full text Add to dashboard Cite

Metrics & MoreArticle Recommendations CONSPECTUS:With the rapid advancement of information technology, an era of intelligence where seamless interconnectivity prevails is coming. The Internet of Everything (IoE) relies on efficient data transmission, wherein radio frequency (RF) and microwave technologies play a pivotal role. RF and microwave technologies spawn extensive applications in mobile communication, radar systems, remote sensing, and other fields. Traditional conductive materials in RF and microwave electronics include copper, gold, and other metals. However, conventional metal-based electronics are constrained by inherent challenges such as susceptibility to oxidation, high density, restricted heat dissipation capacity, and insustainability, thereby impeding their ability to fulfill the requirements of next-generation RF and microwave electronics. Graphene assembled films emerge as a promising class of carbon materials with excellent electrical and thermal conductivity alongside remarkable mechanical stability, chemical inertness, and low density, which are highly suitable for utilization in RF and microwave electronics applications. RF and microwave electronics based on a graphene assembled film exhibit comparable electrical performance to the metallic materials while offering additional advantages such as lightweight, flexibility, corrosion resistance, enhanced heat dissipation efficiency, and fatigue resistance. These distinguished properties enable electronics to adapt to intelligent environments with high integration levels. Therefore, the application of the graphene assembled film has significantly advanced the progress in RF and microwave technology, facilitating metal-substitution.In this Account, we primarily summarize our efforts toward developing the utilization of graphene assembled film (GAF) within the realm of electronics in RF and microwave technology. Through material optimization, device design, and processing technology iteration, we have successfully implemented GAF electronics in wireless communication, wearable systems, electromagnetic protection, and the intelligent control of electromagnetic waves in RF and microwave technology. First, we introduce the advanced properties of graphene and present an overview of the fabrication methods for GAF, including coating, vacuum filtration, and graphene oxide film reducing, highlighting exceptional electrical, mechanical, and thermal properties of GAF, as well as the feasibility of metal substitution. Subsequently, we extensively discuss the application of GAF in radio frequency and microwave technology from various perspectives, encompassing antenna and antenna arrays, flexible electronics, radio frequency identification (RFID) devices, and metasurfaces. GAF-based electronics not only inherit the exceptional lightweight, flexible, corrosion resistance, and fatigue resistance characteristics of GAF but also exhibit superior electrical properties, such as low radiation sidelobe and wide working bandwidth, surpassing the conventional metal-ba...

show abstract

Section: Metasurfacementioning

confidence: 99%

Graphene Assembled Films for Radio Frequency and Microwave Technology

Song,

Zhang,

et al. 2024

Acc. Mater. Res.

Self Cite

View full text Add to dashboard Cite

show abstract

A Tunable Transparent Graphene Absorber with Multifrequency Resonance

Chen,

Cui,

Yang

et al. 2024

Adv Elect Materials

View full text Add to dashboard Cite

The demand for multinarrowband absorber has attracted increasing interest among researchers in recent years. However, integrating multifrequency absorption, tunability, and high optical transparency into an absorber remains a crucial challenge. In this study, a multiband, tunable, and transparent microwave meta‐absorber is theoretically proposed and experimentally demonstrated. This meta‐absorber is composed of resonant patterns made from graphene and indium tin oxide (ITO), placed on a substrate of lithium niobate (LN). By introducing P‐type doping to reduce the resistance of monolayer graphene to around 300 Ω, the impedance matching of the absorber is promoted, consequently manifesting ten absorption points within 40 GHz. The electric field distribution analysis and an equivalent circuit model are employed to elucidate the physical mechanisms of the multiband absorber. Additionally, the lithium niobate dielectric layer possesses a substantial dielectric constant and exhibits phase transition characteristics with temperature changes. When the temperature increases to 250 °C, a comprehensive tuning range of more than 5.49 GHz within 40 GHz range is realized. The maximum tuning range for a single frequency point is 1.33 GHz. With the broadening of the band, the meta‐absorber can provide multiple tunable ranges, making it more favorable for practical applications in optical modulator and sensor.

show abstract