HEM_11δ and HEM_12δ-based Quad band Quad Sense Circularly Polarized tunable Graphene-based MIMO Dielectric Resonator Antenna

Abstract

In this paper, a two port circularly polarized (CP) MIMO Cylindrical Dielectric Resonator Antenna (CDRA) with Quad-band response is designed for terahertz (THz) applications. This antenna is new since MIMO DRA antennas in the THz frequency range have never been described before. Also, by the varying graphene potential of the antenna, isolation between the two antennas is increased and CP tuning can be achieved which is another unique feature of this proposed antenna at THz region. The proposed DRA generates two higher order modes (HEM11δ and HEM12δ). The 3 dB Axial Ratio Bandwidth (ARBW) of 8.22, 2.48, 3.67 and 5.67% is achieved at four resonant frequencies. Various MIMO performance parameters are evaluated and these parameters are within acceptable limits. Advantages of the proposed design are quad response, higher order modes generation, CP tuning and good isolation between the ports. The tunability of graphene material allows it to provide CP responses in the frequency region that is most useful in biomedical applications. The use of a CP antenna in a THz biomedical application can improve system sensitivity by reducing polarisation losses and aligning them. All these features make the proposed MIMO DRA potentially suitable for THz applications.

Graphene-based quad-port MIMO reconfigurable antennas for SATCOM and 5G applications

“…Ideally, the final ECC value should be less than 1. ECC measurement criteria are actually considered Sparameters [4,5,21,24]. The ECC values of both graphene-based quad-port MIMO reconfigurable antenna structures are reported in Figs (7.a) and (8.a), respectively.…”

“…Increasing network capacity: By using this antenna, 5G wireless networks will be able to have the highest capacity in data transmission and communication. The multiple and multi-port capability of this antenna allows networks to simultaneously transmit information through multiple transmitters and receivers, which leads to an increase in network capacity [18][19][20][21][22][23]. In general, the use of graphene-based quad-port MIMO reconfigurable antenna in 5G wireless networks can significantly improve the speed, coverage and capacity of networks and improve the user experience [24][25][26][27][28][29].…”

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

“…The CP tuning for all band is obtained by changing the graphene potential of rectangular DR slab. Another graphene-based CP rectangular DRA has been proposed in [14] for THz communication. The CP wave is achieved by partial coating of Graphene on the surfaces of DR in place of metallic coating.…”

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

“…3,4 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][10][11] multi band, 6 wideband 12 and ultra wideband 13 using different techniques.…”

“…Conductor and surface wave losses are minimized because the main radiator is built of dielectric material 3,4 . 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 .…”