Reflectarray Antenna at Terahertz Using Graphene

Carrasco, Eduardo; Perruisseau‐Carrier, Julien

doi:10.1109/lawp.2013.2247557

Cited by 197 publications

(91 citation statements)

References 15 publications

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“…As a result emerging technologies have been consolidated (e.g. MEMS) and exotic solutions recently introduced, such as photo-conductive [32], macro-mechanical [33], fluidic [34], and graphene-based [35] reconfiguration techniques. Table I provides an overview of the main properties and suitability of the technologies.…”

Section: Enabling Reconfiguration Technologiesmentioning

confidence: 99%

“…In this context recently liquid crystal (LC) technology has been considered for sub-millimeter-wave frequencies [46]. It has been proposed to address upper terahertz or even infrared frequencies using graphene [35] [47]. Interestingly, these emerging technologies allow simple biasing via a single electrode per cell since the material properties are controlled in an analog fashion.…”

Section: Enabling Reconfiguration Technologiesmentioning

confidence: 99%

See 1 more Smart Citation

Reconfigurable Reflectarrays and Array Lenses for Dynamic Antenna Beam Control: A Review

Hum

Perruisseau‐Carrier

2014

IEEE Trans. Antennas Propagat.

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779

413

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Abstract-Advances in reflectarrays and array lenses with electronic beam-forming capabilities are enabling a host of new possibilities for these high-performance, low-cost antenna architectures. This paper reviews enabling technologies and topologies of reconfigurable reflectarray and array lens designs, and surveys a range of experimental implementations and achievements that have been made in this area in recent years. The paper describes the fundamental design approaches employed in realizing reconfigurable designs, and explores advanced capabilities of these nascent architectures, such as multi-band operation, polarization manipulation, frequency agility, and amplification. Finally, the paper concludes by discussing future challenges and possibilities for these antennas.

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Section: Enabling Reconfiguration Technologiesmentioning

confidence: 99%

Section: Enabling Reconfiguration Technologiesmentioning

confidence: 99%

Reconfigurable Reflectarrays and Array Lenses for Dynamic Antenna Beam Control: A Review

Hum

Perruisseau‐Carrier

2014

IEEE Trans. Antennas Propagat.

Self Cite

779

413

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“…It is a common procedure to calculate the required reflection coefficient associated to a certain MS unit cell by assuming the MS periodic. This procedure provides accurate results if unit cells change gradually over the MS [9,14,25]. If all rays are focused at a certain focal point r f the required phase of the reflection coefficient ϕ mn at the mnth MS unit cell is found to be [9] …”

Section: Theorymentioning

confidence: 99%

“…In summary, the focusing and polarization conversion mechanism of the anisotropic plasmonic metalens under the linearly polarized wave is conceptually described by Eqs. (1) and (3), where two approximations extensively used in reflectarray research have been applied [9,14,25]: (i) the concept of local periodicity, and (ii) the reflected phases ϕ mn x;y are evaluated at normal incidence. The latter approximation has been considered to be accurate especially for small to moderate incidence angles and focal length to diameter ratio larger than unity (in our case f ∕D 1.25).…”

Section: Theorymentioning

confidence: 99%

Thin anisotropic metasurfaces for simultaneous light focusing and polarization manipulation

et al. 2015

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The possibility of integration of two important categories of optical components, i.e., circular polarizer and lens, into a thin plasmonic metasurface is examined, for the realistic case when metal losses cannot be neglected, for example when operating in the visible spectrum, or at infrared when non-noble metals are used. We introduce a metasurface made of nanoantennas that offer enough degrees of freedom to control both amplitude and phase of the reflection coefficient. First a theoretical formulation is developed and then an optimal design for a polarizing lens at mid-infrared wavelengths near 4.3 μm is presented. A two-dimensional array of Y-shaped nanoantennas with polarization-dependent and spatially varying phase response offers the possibility of balancing the losses experienced by the x-and y-polarized incident fields and is the basis for such a compact polarizing lens.

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“…The gapless energy spectrum in graphene makes it an attractive candidate for massive nan-oelectronics and nanophotonics devices 1-3 such as terahertz antennas, [4][5][6] filters, 7,8 oscillators, 9 plasmonic Bragg reflectors, 10 absorbers, 11 and surface acoustic-wave amplifiers. 12 Since the surface complex conductivity of graphene can be dynamically controlled by changing the applied voltage, it opens up unprecedented opportunities in developing reconfigurable plasmonic devices at terahertz and mid-infrared frequencies.…”

Section: Introductionmentioning

confidence: 99%

Graphene-based Yagi-Uda antenna with reconfigurable radiation patterns

Jiao

et al. 2016

AIP Advances

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This paper presents a radiation pattern reconfigurable Yagi-Uda antenna based on graphene operating at terahertz frequencies. The antenna can be reconfigured to change the main beam pattern into two or four different radiation directions. The proposed antenna consists of a driven dipole radiation conductor, parasitic strips and embedded graphene. The hybrid graphene-metal implementation enables the antenna to have dynamic surface conductivity, which can be tuned by changing the chemical potentials. Therefore, the main beam direction, the resonance frequency, and the front-to-back ratio of the proposed antenna can be controlled by tuning the chemical potentials of the graphene embedded in different positions. The proposed two-beam reconfigurable Yagi-Uda antenna can achieve excellent unidirectional symmetrical radiation pattern with the front-to-back ratio of 11.9 dB and the10-dB impedance bandwidth of 15%. The different radiation directivity of the two-beam reconfigurable antenna can be achieved by controlling the chemical potentials of the graphene embedded in the parasitic stubs. The achievable peak gain of the proposed two-beam reconfigurable antenna is about 7.8 dB. Furthermore, we propose a four-beam reconfigurable Yagi-Uda antenna, which has stable reflection-coefficient performance although four main beams in reconfigurable cases point to four totally different directions. The corresponding peak gain, front-to-back ratio, and 10-dB impedance bandwidth of the four-beam reconfigurable antenna are about 6.4 dB, 12 dB, and 10%, respectively. Therefore, this novel design method of reconfigurable antennas is extremely promising for beam-scanning in terahertz and mid-infrared plasmonic devices and systems.

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Reflectarray Antenna at Terahertz Using Graphene

Cited by 197 publications

References 15 publications

Reconfigurable Reflectarrays and Array Lenses for Dynamic Antenna Beam Control: A Review

Reconfigurable Reflectarrays and Array Lenses for Dynamic Antenna Beam Control: A Review

Thin anisotropic metasurfaces for simultaneous light focusing and polarization manipulation

Graphene-based Yagi-Uda antenna with reconfigurable radiation patterns

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