Waveguide-Fed Tunable Terahertz Antenna Based on Hybrid Graphene-Metal Structure

Abstract

This paper presents a novel tunable terahertz antenna based on a hybrid graphene-metal structure fed by a waveguide. First, the hybrid plasmonic waveguide is studied by analytical and numerical methods. Then, an efficient terahertz antenna is designed by an analytical approach using the transmission line model. The antenna performances are evaluated in the terahertz frequency band by a full-wave electromagnetic solver. Contrary to previous terahertz antennas based on graphene, the results show that the proposed antenna has satisfactory radiation efficiency and gain. Moreover, this study demonstrates that the reflection parameter of the antenna can be tuned by the chemical potential of graphene. The proposed antenna can be applied for terahertz applications such as wireless communication in interand intra-chip devices and sensing.

Reconfigurable THz Plasmonic Antenna Based on Few-Layer Graphene with High Radiation Efficiency

“…Other configurations such as few-layer graphene or certain graphene stacks would theoretically lead to higher radiation efficiency thanks to their higher conductivity and mode coupling, respectively. However, few-layer graphene has been considered for plasmonic waveguides with high confinement [9] and for antennas as an auxiliary element [10], but not as the radiating element of plasmonic antennas; whereas graphene stacks have been introduced in [11,12] seeking self-biased reconfigurability, not better radiation efficiency.…”

Rectangular Dielectric Resonator Antenna Fed by Graphene Films Microstrip for 5G Communication

“…Graphene, either in its single layer and multi‐layer form, has a lot of unique properties like high conductivity of 6000 S/cm and extreme high thermal conductivity of 5000 W·m −1 ·K −1 , which is very suitable for RF antenna design . As far as we know, most investigations of graphene‐based antennas are focused in THz band . A novel and simple dielectric grating‐based graphene leaky‐wave antenna of reconfigurable radiation pattern is reported by J. Li .…”

“…A novel and simple dielectric grating‐based graphene leaky‐wave antenna of reconfigurable radiation pattern is reported by J. Li . A waveguide‐fed tunable terahertz graphene antenna with high radiation efficiency is presented by S. E. Hosseininejad and N. Komjani . This antenna is likely to be employed for various radiated‐wave applications such as wireless communication in electromagnetic nanonetworks and sensing.…”

“…9,10 As far as we know, most investigations of graphene-based antennas are focused in THz band. [11][12][13] A novel and simple dielectric grating-based graphene leaky-wave antenna of reconfigurable radiation pattern is reported by J. Li. 11 A waveguide-fed tunable terahertz graphene antenna with high radiation efficiency is presented by S. E. Hosseininejad and N. Komjani.…”

“…11 A waveguide-fed tunable terahertz graphene antenna with high radiation efficiency is presented by S. E. Hosseininejad and N. Komjani. 12 This antenna is likely to be employed for various radiated-wave applications such as wireless communication in electromagnetic nanonetworks and sensing. W. Fuscaldo et al have analyzed the dissipation losses in plasmonic graphene-based THz antennas.…”