Graphene Based Tunable Terahertz Holographic Antennas

Ren, pengfei; Jiang, Lijun; Li, Ping

doi:10.1109/ojap.2022.3158203

Cited by 14 publications

(21 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tunability can be achieved by introducing special materials, such as graphene. Bridging the connection between conductivity of graphene and surface impedance, the radiation properties are tunable with an external DC control on graphene conductivity [111], [117].…”

Section: B Hmimos Holographic Design Methodologymentioning

confidence: 99%

“…Alternatively, the TE propagation mode can be excited by multiple substrate-integrated waveguide (SIW) horns within a substrate layer [112], [113]. For the TM mode propagation, single or multiple bottom-fed vertical monopoles are widely adopted in designing artificial impedance surfaces [114]- [117], enabling a single or multiple beam radiations. The feed can be alternatively replaced by a bottom-fed coaxial probe, as in [118], [119].…”

Section: A Hmimos Hardware Structurementioning

confidence: 99%

“…In the second category, the silicon dioxide (glass) substrate possesses a low dielectric loss as well. In [111] and [117], a grounded and graphene sheet/patches transferred silicon dioxide substrate was employed for realizing electrically tunable THz HMIMOS, respectively. In [120], a glass substrate was adopted for designing a high-gain mmWave HMIMOS.…”

Section: A Hmimos Hardware Structurementioning

confidence: 99%

“…In addition, the dielectric materials can potentially promote a smaller form factor and a wide range of bandwidth compared with the metallic counterparts [132]. Notably, for its unique but excellent mechanical, electronic and optical characteristics, the newly discovered graphene [133] has attracted enormous attentions, and has found a wide range of applications for implementing radiating elements [111], [117]. Graphene composes of carbon atoms in the hexagonal structure, and possesses excellent properties such as low loss, electronic tunability, and strong light matter interactions.…”

Section: A Hmimos Hardware Structurementioning

confidence: 99%

“…It possesses superior mechanical, electronic and optical properties, namely ultrahigh breaking strength, ultra-high charge carrier mobility and ultra-low resistivity for desired conductivity, as well as high transparency due to the ultra-thin thickness. The excellent properties, especially from an electronic perspective, allow a realization of dynamically controllable conductivity via electric or magnetic manners, enabling a feasible way for implementing reconfigurable devices, particularly for HMI-MOS [111], [117]. These studies desgin HMIMOS by stacking the ultra-thin graphene sheet onto a grounded silicon dioxide substrate, and then control the conductivity of graphene via DC bias voltages for achieving an arbitrarily desired surface impedance guided by the holographic principle.…”

Section: Hmimos Tuning Mechanismmentioning

confidence: 99%

See 4 more Smart Citations

Holographic MIMO Communications: Theoretical Foundations, Enabling Technologies, and Future Directions

Gong¹,

Vinieratou²,

Ji³

et al. 2023

Preprint

View full text Add to dashboard Cite

<p>Future wireless systems are envisioned to create an endogenously holography-capable, intelligent, and programmable radio propagation environment, that will offer unprecedented capabilities for high spectral and energy efficiency, low latency, and massive connectivity. A potential and promising technology for supporting the expected extreme requirements of the sixth-generation (6G) communication systems is the concept of the holographic multiple-input multiple-output (MIMO) surface (HMIMOS), which will actualize holographic radios with reasonable power consumption and fabrication cost. An HMIMOS is an ultra-thin and nearly continuous aperture that incorporates reconfigurable and sub-wavelength-spaced antennas and/or metamaterials. Such surfaces comprising dense electromagnetic (EM) excited elements are capable of recording and manipulating impinging fields with utmost flexibility and precision, as well as with reduced cost and power consumption, thereby shaping arbitrary-intended EM waves with high energy efficiency. The powerful EM processing capability of HMIMOS opens up the possibility of wireless communications of holographic imaging level, paving the way for signal processing techniques realized in the EM domain, possibly in conjunction with their digital-domain counterparts. However, in spite of the significant potential, the studies on HMIMOS-based wireless systems are still at an initial stage, its fundamental limits remain to be unveiled, and critical technical challenges with holographic MIMO communications need to be addressed. In this survey, we present a comprehensive overview of the latest advances in the holographic MIMO communications paradigm, with a special focus on their physical aspects, their theoretical foundations, as well as the enabling technologies for HMIMOS systems. We also compare HMIMOS systems with conventional multi-antenna technologies, especially massive MIMO systems, present various promising synergies of HMIMOS with current and future candidate technologies, and provide an extensive list of research challenges and open directions for future HMIMOS-empowered wireless applications.</p>

show abstract

Section: B Hmimos Holographic Design Methodologymentioning

confidence: 99%