Quad-Band Circularly Polarized Tunable Graphene Based Dielectric Resonator Antenna for Terahertz Applications

A novel ultra wideband circularly polarized stacked cylindrical dielectric resonator antenna with modified ground plane

“…CP waves are generally excited by two orthogonal linearly polarized components with equal magnitude and with 90 phase between them. 7 To analyze CP generation inside proposed CPDRA, EF vector distribution at time instants of t = 0, T/4, T/2 and 3T/4 at center frequency of 5.72 GHz is depicted as shown in Figure 12. A 90 phase difference is observed between EF vectors in the proposed DR as depicted in Figure 12A-D.…”

“…5,6 CP waves are generally excited by two orthogonal linearly polarized components with equal magnitude and with 90 phase between them. 7 Recently, Circularly Polarized DRA's (CPDRA) are implemented for single band, 8 dual band, [9][10][11] multi band, 6 wideband 12 and ultra wideband 13 using different techniques. These antennas provide less gain and also narrow Axial Ratio Bandwidth (ARBW).…”

“…Modern wireless communication systems demand Circularly Polarized (CP) antennas to overcome signal mismatch between transmission and reception, which reduce multipath interference between signals, and maximize polarization efficiency 5,6 . CP waves are generally excited by two orthogonal linearly polarized components with equal magnitude and with 90° phase between them 7 . Recently, Circularly Polarized DRA's (CPDRA) are implemented for single band, 8 dual band, 9–11 multi band, 6 wideband 12 and ultra wideband 13 using different techniques.…”

Csrr Loaded Graphene Inspired Ebg Based High Isolation Miniaturized Wideband Thz Dielectric Resonator Mimo Antenna for Nano/Optical Communication in 6g Iot and Bio-Medical Sensing Application

“…Literature [10] proposed a dual band rectangular THz DRA based on graphene and frequency tunability achieved by varying chemical potential of graphene. An analysis of high gain graphene based circularly polarized dielectric resonator antenna (CPDRA) has been reported in [11] for THz applications. The CP characteristic and tunability obtained by deformed geometries of silicon based annular dielectric resonators and by adjusting the graphene potential positioned on the top of DR surface, respectively.…”

A Single Feed Graphene-based Circularly Polarized Antenna for THz Applications

“…Different methods have been used to design circularly polarized graphene antennas in THz region. In [10]- [11], circularly polarized dielectric resonator antennas with graphene coating have been proposed. A graphene antenna with perturbation in the shape of radiator to generate the CP response has been presented [12].…”