A graphene‐based tunable negative refractive index metamaterial and its application in dynamic beam‐tilting terahertz antenna

Luo, Yong; Zeng, Qingsheng; Yan, Xin; Jiang, Tao; Yang, Rongcao; Wang, Jiayun; Wu, Yong; Lu, Qichao; Zhang, Xia

doi:10.1002/mop.31970

Cited by 22 publications

(5 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The frequency tuning range of our work is 1.5 times than that of the antenna reported in Reference 17, and the tuning angle of the beam direction is close to References 18,21. Compared with a graphene‐based high impedance surface leaky‐wave antenna, 19 a dual band reconfigurable terahertz patch antenna, 20 and a dynamic beam‐tilting terahertz antenna, 22 the proposed antenna has the widest tuning angle of the beam direction. Furthermore, the frequency tuning range (0.9 THz) of the proposed antenna is larger than that of 19 (0.66 THz), 20 (0.8/0.4 THz) and 23 (0.09/0.04/0.04/0.09 THz).…”

Section: Comparisonssupporting

confidence: 60%

“…Symbol “Y” in the table represents “yes.” The comparisons mainly focus on the reconfigurable type, frequency‐tuning range, and beam scanning angle. As seen, the proposed antenna can realize both tunable frequency and beam direction by altering the chemical potentials applied to the graphene, which has an advantage over single frequency or radiation pattern adjustable antennas 17,18,21–23 . The frequency tuning range of our work is 1.5 times than that of the antenna reported in Reference 17, and the tuning angle of the beam direction is close to References 18,21.…”

Section: Comparisonsmentioning

confidence: 49%

“…The beam reconfiguration of the antenna is improved to 75°. A graphene‐based THz tunable negative refractive index metamaterial was demonstrated in Reference 22, and then a dynamic beam‐tilting antenna loaded with the metamaterial‐based stacked configuration was designed. Through changing the refractive index of the metamaterial or the number of layers in the stacked configuration, the steering angle can be adjusted from 0° to −27°.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design of a reconfigurable antenna based on graphene for terahertz communication

Zhang

Ruan

Dai

et al. 2021

Int J Numerical Modelling

View full text Add to dashboard Cite

A broadband, high radiation efficiency graphene‐based reconfigurable square spiral antenna for terahertz communication is proposed. The main part of the antenna is the graphene‐based square spiral microstrip patch. The proposed antenna is built and simulated using high‐frequency structure simulator (HFSS). By applying different combinations of chemical potentials on the graphene layer, the operating frequency of the antenna can be varied from 0.1 to 2 THz. The tuning range of frequency and beam direction with same and different chemical potentials applied to the two graphene sheets are also studied. When the antenna is applied with different chemical potentials, the required bias voltages are much lower to achieve the same frequency tuning range, and the tuning range of beam direction is about 2.5 times that of same chemical potentials. The realized beam reconfiguration of the proposed antenna is over a wide range up to 74°, and the calculated maximum radiation efficiency of the proposed antenna at 1.48 THz is 85.06%. Therefore, the proposed reconfigurable antenna makes it extremely promising for terahertz communication system.

show abstract

Section: Comparisonssupporting

confidence: 60%

Section: Comparisonsmentioning

confidence: 49%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design of a reconfigurable antenna based on graphene for terahertz communication

Zhang

Ruan

Dai

et al. 2021

Int J Numerical Modelling

View full text Add to dashboard Cite

show abstract

“…Compared with the literature [18,19], the advantage of this method is keeping the overall volume (1.2λ×1.2λ×0.5λ) of the proposed structure unchanged throughout the beam-steering operation without using any active components.…”

Section: Steering Antenna Beam In Cavity Fabry Perotmentioning

confidence: 99%

A Multifunctional Patch Antenna Loaded with Near Zero Index Refraction Metamaterial

Khoutar¹,

Nayat-Ali²,

Aznabet³

et al. 2022

PIER M

View full text Add to dashboard Cite

In this paper a multifunctional patch antenna loaded with near zero index refraction metamaterial (NZIM) is presented. This multifunctional antenna operates at 5.8 GHz and provides high gain and beam steering capability. The proposed configuration comprises a patch antenna placed below an NZIM superstrate. The rectangular microstrip antenna is used as a radiation source to demonstrate the performance of this design. The NZIM superstrate, which behaves as an NZIM, based on 9 × 9 resonating unit cells of split ring resonators (SRRs), allows gathering radiated waves from the antenna and collimating them toward the superstrate's normal direction, which results in gain enhancement. The beam-steering in the E-plane is obtained by slowly tilting the NZIM over the patch antenna. The main characteristics of the antenna placed near the NZIM superstrate are studied numerically and experimentally to successfully demonstrate this dual function feature. It is found experimentally that the gain enhancement of 8 dB with improved directivity and radiation efficiency are obtained in comparison with the antenna without the NZIM metasurface. In addition, we were also able to steer the direction of the main beam just by tilting the NZIM superstrate from −20 • to 20 • with a gain variation of 5 dB and without changing the whole dimension of the structure.

show abstract

“…Several GRM-based configurations have been reported in the literature that can simultaneously provide high radiation efficiency and frequency reconfigurability, such as tunable THz metamaterials comprising metallic resonance structures with embedded graphene [83], and multiple graphene sheets controlled by different bias voltages [84]. Nevertheless, the feasibility of these configurations for IoBNT applications must be evaluated in terms of miniaturization.…”

Section: B Transceivers For Thz-band Nanocommunicationsmentioning

confidence: 99%

Universal Transceivers: Opportunities and Future Directions for the Internet of Everything (IoE)

et al. 2021

View full text Add to dashboard Cite

The Internet of Everything (IoE) is a recently introduced information and communication technology (ICT) framework promising for extending the human connectivity to the entire universe, which itself can be regarded as a natural IoE, an interconnected network of everything we perceive. The countless number of opportunities that can be enabled by IoE through a blend of heterogeneous ICT technologies across different scales and environments and a seamless interface with the natural IoE impose several fundamental challenges, such as interoperability, ubiquitous connectivity, energy efficiency, and miniaturization. The key to address these challenges is to advance our communication technology to match the multi-scale, multi-modal, and dynamic features of the natural IoE. To this end, we introduce a new communication device concept, namely the universal IoE transceiver, that encompasses transceiver architectures that are characterized by multi-modality in communication (with modalities such as molecular, RF/THz, optical and acoustic) and in energy harvesting (with modalities such as mechanical, solar, biochemical), modularity, tunability, and scalability. Focusing on these fundamental traits, we provide an overview of the opportunities that can be opened up by micro/nanoscale universal transceiver architectures towards realizing the IoE applications. We also discuss the most pressing challenges in implementing such transceivers and briefly review the open research directions. Our discussion is particularly focused on the opportunities and challenges pertaining to the IoE physical layer, which can enable the efficient and effective design of higher-level techniques. We believe that such universal transceivers can pave the way for seamless connection and communication with the universe at a deeper level and pioneer the construction of the forthcoming IoE landscape.Index Terms– Internet of Everything, Universal IoE Transceiver, Interoperability, Multi-modality, Hybrid Energy Harvesting, Molecular Communications, THz Communications, Graphene and related nanomaterials.

show abstract

A graphene‐based tunable negative refractive index metamaterial and its application in dynamic beam‐tilting terahertz antenna

Cited by 22 publications

References 30 publications

Design of a reconfigurable antenna based on graphene for terahertz communication

Design of a reconfigurable antenna based on graphene for terahertz communication

A Multifunctional Patch Antenna Loaded with Near Zero Index Refraction Metamaterial

Universal Transceivers: Opportunities and Future Directions for the Internet of Everything (IoE)

Contact Info

Product

Resources

About