Nano-Dielectric Resonator Antenna Reflectarray/Transmittarray for Terahertz Applications

Abstract

Nanoantennas have been introduced for different applications as solar-cell, medical imaging, and fast data communications. The material properties of good conducting metals introduce plasmonic behavior at terahertz frequencies. The electrical properties of different good conducting metals are modelled using the Drude model and have been investigated for reflectarray/ transmitarray operation. The radiation characteristics of nano-dielectric resonator antenna (NDRA) reflectarray at 633 nm have been investigated. The unit-cell consists of NDR mounted on the metallic supporting plane. A parametric study for the NDR unit cell dimensions and material has been introduced. The NDR unit-cell with silver supporting plane has been designed and analyzed for reflectarray applications at 633 nm. The radiation characteristics of the NDRA transmitarray has been introduced for 633 nm applications. The NDR unit-cell consists of two NDRs mounted on the top and bottom of the metallic supporting plane. A comparison between the radiation characteristics of 17×17 and 21×21 NDRA transmitarray has been introduced. A compromise between the nano-transmitarray size, maximum gain, and operating bandwidth is applied to terahertz applications. The finite integral technique is used to carry a full wave analysis to design an NDRA reflectarray and an NDRA transmitarray..

Frequency tunable graphene metamaterial reflectarray for terahertz applications

“…Tunable electromagnetic materials can be used as part of the construction of the reflectarray elements, enabling reflectarray to become powerful beam‐forming platforms that combine the best features of aperture antennas and phased arrays [21–23]. Conventional reflectarray antennas consist of about half wavelength unit‐cell elements; however, metamaterial reflectarrays use unit‐cell elements very small compared with the operating wavelength [24–25].…”

Optimising a nantenna array at 1550 nm band

“…In terms of research, nantennas are still in curiosity phase as only few designs have been realised that are based on basic microwave designs. Most of the available state-of-the-art literature expresses the characteristics of nantennas based on simulations [14][15][16][17]. The analyses of these nantennas with their high dispersive nature of metals have rendered only few known EM simulators that can perform these optical antenna simulations.…”