Topic
Dielectric resonator antenna
About: Dielectric resonator antenna is a research topic. Over the lifetime, 8199 publications have been published within this topic receiving 111090 citations. The topic is also known as: DRA.
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TL;DR: A novel cavity perturbation technique using coaxial cavity resonators for the measurement of complex permittivity of liquids is presented and the dielectric parameters of water and nitrobenzene are measured.
Abstract: A novel cavity perturbation technique using coaxial cavity resonators for the measurement of complex permittivity of liquids is presented. The method employs two types of resonators (Resonator I and Resonator II). Resonator I operates in the frequency range 600 MHz-7 GHz and resonator II operates in the frequency range 4 GHz-14 GHz. The introduction of the capillary tube filled with the sample liquid into the coaxial resonator causes shifts in the resonance frequency and loaded Q-factor of the resonator. The shifts in the resonance frequency and loaded Q-factor are used to determine the real and imaginary parts of the complex permittivity of the sample liquid, respectively. Using this technique, the dielectric parameters of water and nitrobenzene are measured. The results are compared with those obtained using other standard methods. The sources of errors are analyzed.
46 citations
TL;DR: The beam steering was successfully achieved by switching the termination capacitor on the parasitic element of the dielectric resonator antenna with parasitic elements and the antenna beam of the proposed DRA array managed to steer from −32° to +32° at 15 GHz.
Abstract: This paper presents the findings of a steerable higher order mode (TE $^{\mathrm {y}}_{1\delta 3}$ ) dielectric resonator antenna with parasitic elements. The beam steering was successfully achieved by switching the termination capacitor on the parasitic element. In this light, all of the dielectric resonator antennas (DRAs) have the same dielectric permittivity similar to that of ten and excited by a $50\Omega $ microstrip with a narrow aperture. The effect of the mutual coupling on the radiation pattern and the reflection coefficient, as well as the array factor, was investigated clearly using MATLAB version 2014b and ANSYS HFSS version 16. As the result, the antenna beam of the proposed DRA array managed to steer from −32° to +32° at 15 GHz. Furthermore, the measured antenna array showed the maximum gain of 9.25 dBi and the reflection coefficients which are less than −10 dB with the bandwidth more than 1.3 GHz, which is viewed as desirable for device-to-device communication in 5G Internet of Things applications.
46 citations
Patent•
15 Nov 1984TL;DR: In this article, a dielectric material coaxial resonator with a through-opening axially formed in it in one direction, an inner conductive layer formed on an inner peripheral surface of the through opening and an outer wall surface formed on the outer wall of the block member, and an open end face which is provided on at least one end face of the Dielectric Material block member where the throughopening is opened is opened and at which an outer surface of dielectrical material block member is exposed.
Abstract: A dielectric material coaxial resonator which includes at least one dielectric material block member having a through-opening axially formed in it in one direction, an inner conductive layer formed on an inner peripheral surface of the through-opening, an outer conductive layer formed on an outer wall surface of the dielectric material block member, an open end face which is provided on at least one end face of the dielectric material block member where the through-opening is opened and at which an outer surface of the dielectric material block member is exposed, and capacitor electrodes formed on the open end face so as to constitute a single resonator unit.
46 citations
TL;DR: In this paper, a compact dielectric resonator antenna (DRA) for wideband applications is proposed, which consists of two cylindrical DRA resonators that are asymmetrically located with respect to the center of a rectangular coupling aperture.
Abstract: A compact dielectric resonator antenna (DRA) for wideband applications is proposed. Two cylindrical dielectric resonators that are asymmetrically located with respect to the center of a rectangular coupling aperture are fed through this aperture. By optimizing the design parameters, an impedance bandwidth of about 29%, covering the frequency range from 9.62 to 12.9 GHz, and a gain of 8 dBi are obtained. Design details of the proposed antenna and the results of both simulation and experiment are presented and discussed.
46 citations
TL;DR: In this paper, the coupling coefficient between a microstripline and the dipolar magnetic (TE/0gamma delta/ ) mode of a cylindrical dielectric resonator was evaluated by using two methods numerical and analytical.
Abstract: The coupling coefficient between a microstripline and the dipolar magnetic (TE/0gamma delta/ ) mode of a cylindrical dielectric resonator is evaluated by using two methods numerical and analytical. Theoretical and experimental extenal quality factors, as well as the scattering matrix parameters which consider the substrate material, the ground plane, and the distance between the line and the resonator, are presented.
45 citations