Ultra-wide-band Circularly Polarized Mushroom-shaped Dielectric Resonator Antenna for 5G and sub-6 GHz Applications

In this paper, a mushroom shaped ultrawideband circularly polarized Dielectric Resonator Antenna (DRA) is proposed for lower 5G band and sub-6 GHz applications. The proposed DRA is excited by two orthogonal conformal probes and fed by a simple L shape microstrip feed network. The DRA exhibits wide impedance bandwidth of approximately 34.5% (3.5-5.1 GHz) with S11 better than -10 dB and wide circular polarization bandwidth of 33% (3.55-5 GHz) with axial ratio less than 3 dB in broadside direction. Mushroom-shaped DRA has a peak gain of 6.5 dBi and an average gain throughout the operating band is 5.5 dBi. Simulated results of the DRA are in good agreement with measured results of fabricated prototype. This DRA is a strong candidate for the sub-6 GHz and 5G band applications

Glueless Multiple Input Multiple Output Dielectric Resonator Antenna with Improved Isolation

In this dissemination, a glueless compact dual port dielectric resonator antenna (DRA) is proposed for X-band applications. A prototype has been fabricated with RT Duroid substrate and Eccostock (ϵr = 10)-made DRA. The ring shaped DRA is excited by aperture coupled feeds maintaining symmetry between both the ports. Four cylindrical copper rods with four strips have been used to fix the DRA on the substrate and provide additional mechanical stability. Eight copper strips are used to provide impedance matching and impedance bandwidth (IBW) widening. The measured IBW of dual port DRA is 10.5% (8.05–8.95 GHz) and maximum gain of radiator is 6.2 dBi. The proposed antenna becomes compact when the net volume of DRA is approximately 3.5 cm3 and the volume of the substrate is 2.88 cm3, with a surface area of 36 cm2 and operating in X-band, which finds applications in satellite communication, weather radar, synthetic aperture radar, and telemetry tracking and control

Application of Dielectric Resonator Antenna in Implantable Medical Devices

Wireles biomedical telemetry through Implantable Medical Devices (IMD) has been one of the major interest of human kind in present times due to life supporting advantages. As sensors, actuators, battery and antenna comprises the IMD and role of efficient radiator describes the quality of implantable device. However, Dielectric Resonator Antennas (DRA) have been proved more efficient in comparison to their contemporaries in different applications due to its inherent properties, but application of DRA in implantable devices is not proposed yet. In this paper, a rectangular DRA resonating at 2.45 GHz excited by coplanar waveguide feed has been proposed for in depth implantable applications

Novel superman-diamond inspired DRA for X band applications

Exploiting advantage of Dielectric Resonator Antennas (DRA), in this dissemination a novel superman-diamond inspired shaped DRA has been proposed for X-band applications. Furthermore, possibilities of Multiple Input Multiple Output (MIMO) DRA explored using proposed novel shaped DRA and a two-element MIMO DRA has also been proposed for X-band applications. Proposed DRA made up of anisotropic composite ceramic material with dielectric constant 10 has been placed on the substrate with dielectric constant 3.55 and thickness 20 mil. Proposed DRA and MIMO DRA have demonstrated 11.7% and 9.5% impedance bandwidths, respectively. Other performance characteristics of MIMO DRA such as mutual coupling, isolation between ports, ECC, TARC have also been examined. To validate the performance of proposed DRA, simulated performances have been compared between two electromagnetic simulator solvers

Manipulating the radiation pattern of equilateral triangular dielectric resonator antenna using asymmetric grooves

A new method to manipulate the radiation pattern of a triangular dielectric resonator antenna is proposed here. By engraving asymmetric grooves in the antenna walls, the intensity of electric fields on its walls is adjusted, which, if properly done, leads to an increase in the directivity of the antenna. Then, the possibility of rotating the radiation pattern by creating asymmetric grooves in the antenna wall is investigated. It is proved that by adjusting the ratio of the amplitude of equivalent magnetic currents on the antenna walls, rotation can be created in the main beam of the antenna pattern. The simulation results are validated by measuring the reflection coefficient, radiation patterns, and gain of the DRA. The measured results confirm that the antenna operates from 3.1 to 3.8 GHz and the maximum gain is 9.2 dBi