Dielectric resonator antenna: A solution for its mount on metallic body
01 Jul 2017-pp 1765-1766
TL;DR: In this article, a new compound ground plane has been conceived for the DRA in such a way that no characteristics and radiation pattern of the antenna are disturbed, and a full metallic configuration suitable for practical purposes has been suggested in this work.
Abstract: In a Dielectric Resonator Antenna (DRA), conventionally glue or adhesive is used to fix the ceramic DRA block onto the antenna Ground Plane (GP) made of a metallic sheet. In this work a new compound ground plane has been conceived. This serves as a GP for the DRA as well as a holding structure. This technique replaces the adhesive or glue. The design has been made in such a way that no characteristics and radiation pattern of the antenna are disturbed. A full metallic configuration, suitable for practical purposes has been suggested in this work. The proposed configuration shows expected broadside radiation and ∼ 6 dBi gain, with agreeable co-polar to cross-polar isolation. Finally, a prototype has been fabricated and experimentally studied. The measurement results corroborate the simulated data.
Citations
More filters
TL;DR: The results demonstrate that the proposed fixing strategy provides superior characteristics such as shock-resistance, fabrication and assembly simplicity, and robust antenna performance.
Abstract: Various conventional and novel fixing strategies for dielectric resonator antennas (DRAs) in K band and beyond are presented and investigated. Their effects on DRAs are studied in depth and explained theoretically through the perturbation theory and basic principles of DRAs. Multifunctional fixtures which achieve different antenna performance are then proposed and discussed. Their mechanisms for offering flexible bandwidth, miniaturization, frequency diversity, low cross polarization, and circular polarization are explained. In practical applications, glue is used besides fixtures to increase reliability, and its influence on antenna performance is difficult to predict. By considering various glue distributions in simulation beforehand, potential performance degradation is successfully mitigated. For validation, a four-element DRA array for 24-GHz automotive radars is fabricated. The results demonstrate that the proposed fixing strategy provides superior characteristics such as shock-resistance, fabrication and assembly simplicity, and robust antenna performance.
9 citations
Cites methods from "Dielectric resonator antenna: A sol..."
...In [11], [25], and [26], drilled metal layers were used so that the DRAs were embedded in the metal ground plane....
[...]
TL;DR: In this paper , a glueless compact dual-port dielectric resonator antenna (DRA) is proposed for X-band applications, where four cylindrical copper rods with four strips are used to fix the DRA on the substrate and provide additional mechanical stability.
Abstract: 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.
1 citations
01 Feb 2020
TL;DR: In this paper, a new mushroom-shaped 2.4GHz dielectric resonator antenna has been proposed, which can achieve a higher impedance bandwidth of about 71% which is generally 10% in the case of conventional DRA.
Abstract: The use of dielectric resonator antenna (DRA) has gained massive interest in the field of microwave and millimeter-wave applications due to the absence of metal parts, which lead to loss and power dissipation at higher frequencies. This paper has proposed a new mushroom-shaped, 2.4GHz dielectric resonator antenna having higher impedance bandwidth. This new antenna is designed using a material of dielectric constant near to 10 and can achieve a higher impedance bandwidth of about 71% which is, generally 10% in the case of conventional DRA. The hybrid antenna gain (5dB), higher radiation efficiency, wideband width, and voltage standing wave ratio can make it compatible with customized different applications of communications. The proposed antenna is lighter in weight and also cost-effective. Finite element methods have applied to design the antenna as well as verify the results.
1 citations
References
More filters
15 Apr 2005
TL;DR: Linearly and circularly polarized conformal strip-fed dielectric resonator antennas (DRAs) are studied in this article, where a parasitic patch is used to excite a nearly degenerate mode.
Abstract: Linearly and circularly polarized conformal strip-fed dielectric resonator antennas (DRAs) are studied in this article. In the latter case, a parasitic patch is used to excite a nearly degenerate mode. The hemispherical DRA, excited in its fundamental broadside TE111 mode, is used for the demonstration. In the analysis, the mode-matching method is used to obtain the Green's functions, whereas the method of moments is used to solve for the unknown strip currents. In order to solve the singularity problem of the Green's functions, a recurrence technique is used to evaluate the impedance integrals. This greatly increases the numerical efficiency. Measurements were carried out to verify the calculations, with good results.
Keywords:
circularly polarized antenna;
dielectric antennas;
mode-matching methods;
moment methods;
parasitic antennas;
resonance
898 citations
TL;DR: In this paper, the authors present a historical review of the research carried out on dielectric resonator antennas (DRAs) over the last three decades and highlight major research activities in each decade.
Abstract: This article presents a historical review of the research carried out on dielectric resonator antennas (DRAs) over the last three decades. Major research activities in each decade are highlighted. The current state of the art of dielectric-resonator-antenna technology is then reviewed. The achievable performance of dielectric resonator antennas designed for compactness, wide impedance bandwidth, low profiles, circular polarization, or high gain are illustrated. The latest developments in dielectric-resonator-antenna arrays and fabrication techniques are also examined.
494 citations
"Dielectric resonator antenna: A sol..." refers background in this paper
...The Dielectric Resonator (DR) block must be attached to the ground plane (GP) or substrate after fabrication [1,2]....
[...]
TL;DR: In this paper, a cylindrical dielectric resonator antenna (CDRA) has been examined with a view for using it as another radiating mode with broadside radiation patterns.
Abstract: A resonant mode (HEM12δ), other than those ( HEM11δ and TM01δ) conventionally excited and used in a cylindrical dielectric resonator antenna (CDRA) has been examined with a view for using it as another radiating mode with broadside radiation patterns. Excitation of the mode, being the most challenging aspect, has been discussed and resolved by employing an innovative technique. The proposed concept has been successfully verified and experimentally demonstrated for the first time. More than 8-dBi peak gain with excellent broadside radiation has been obtained from a prototype shaped from a commercially available low-loss dielectric material with relative permittivity 10.
132 citations