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

Abstract

In this paper, rectangular dielectric resonator antennas (RDRAs) fed by offset tapered copper and graphene microstrip lines are presented. A comparison between these two feeding materials is made with an aim of using the high‐conductivity graphene film (HCGF) to replace copper for feeding the RDRA if feasible. Four feed forms have been discussed. The presented feed mechanism is able to couple electromagnetic energy in three different modes of the RDRA. The HCGF is utilized to replace copper for feeding the RDRA. An impedance bandwidth of 11.32% (3.25 GHz ~ 3.64 GHz) is realized in the experiments by using a graphene feed line, compared to that of 12.24% (3.22 GHz ~ 3.64 GHz) for copper, and a peak gain of 4.48dBi is obtained at the center frequency. The results show that the HCGF can be used to couple the RDRA, and the HCGF fed RDRA has good performance. Radiation patterns around the center frequency are also presented.

Flexible Graphene-Assembled Film-Based Antenna for Wireless Wearable Sensor with Miniaturized Size and High Sensitivity

“…Graphene, a new generation of carbon material, is shown to be a good candidate for flexible RF sensors. − In addition to the common features of conductive polymers and carbon materials, it also offers a distinct advantage in terms of electrical conductivity. Graphene-assembled film (GAF) with multilayer sheets, compared to mono- or few-layer graphene films, is attracting more attention due to its high electrical conductivity and low sheet resistance. − In 2018, we first reported that the GAF-based flexible RF sensor has a higher stability and sensitivity than the copper foil-based antenna sensor with the same size due to the material properties . However, the sensitivity and miniaturization of GAF-based flexible RF sensor need to be further improved to meet the requirements of wearable electronic devices.…”