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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.


Papers
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Journal ArticleDOI
TL;DR: A wideband circularly polarized cylindrical shaped dielectric resonator antenna with simple microstrip feed network with average gain of 5.5 dBi and radiation efficiency of above 96% over operational frequency band is designed and investigated.
Abstract: In this paper, a wideband circularly polarized cylindrical shaped dielectric resonator antenna (DRA) with simple microstrip feed network has been designed and investigated. The proposed design uses dual vertical microstrip lines arranged in a perpendicular fashion to excite fundamental orthogonal hybrid ${HE}_{11\delta }^{x}$ and ${HE}_{11\delta }^{y}$ modes in the cylindrical DR. The Phase quadrature relationships between orthogonal modes have been attained by varying corresponding microstrips heights. To ratify the simulation results, an antenna prototype is fabricated and measured. Measured input reflection coefficient and axial ratio bandwidth (at $\Phi =0^{\circ }$ , $\theta =0^{\circ }$ ) of 30.37% (2.82–3.83 GHz) and 24.6% (2.75–3.52 GHz) has been achieved, respectively. This antenna design achieves an average gain of 5.5 dBi and radiation efficiency of above 96% over operational frequency band. Justifiable agreement between simulated and fabricated antenna results are obtained.

37 citations

Journal ArticleDOI
TL;DR: In this article, a compact wideband circularly polarized rectangular dielectric resonator antenna (DRA) with dual underlaid hybrid couplers is investigated for the first time.
Abstract: A compact wideband circularly polarized rectangular dielectric resonator antenna (DRA) with dual underlaid hybrid couplers is investigated for the first time.As no extra footprint is needed for the couplers, the proposed antenna is very compact. The dual hybrid couplers are connected to generate four quadrature signals that are fed to four sequentially rotated excitation strips stuck on the four side walls of the DRA. It is found that the 3-dB axial-ratio bandwidth of the proposed antenna can be as wide as 27.7%. The reflection coefficient, radiation pattern, and antenna gain of the proposed antenna are studied, and reasonable agreement between the measured and simulated results is observed. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2789–2791, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25591

37 citations

Journal ArticleDOI
TL;DR: In this article, a partial reflector surface structure was proposed to improve the isolation and correlation coefficient values between cylindrical dielectric resonator antennas (cDRAs) for multiband multiple-input-multiple-output (MIMO) applications.
Abstract: This letter presents a novel partial reflector surface structure to improve the isolation and correlation coefficient values between cylindrical dielectric resonator antennas (cDRAs) for multiband multiple-input–multiple-output (MIMO) applications. To achieve multiband characteristics, three different groups of cDRA are proposed to cover 5.2, 5.5, and 5.8 GHz bands, respectively. Each group has two cDRAs. Thus, three groups (i.e, six cDRA) are placed at the top of the substrate and each cDRA is excited using a coplanar waveguide-fed conformal strip-line. To achieve improved isolation, three different phase gradient frequency selective surfaces (FSSs) are designed, which operate at 5.2, 5.5, and 5.8 GHz bands, respectively. This phase-gradient FSS is utilized as a superstrate above each group of the DR elements. As a result, two different far-field patterns are achieved from each group of antenna elements, which deliver improved isolation as well as low field correlation. This exclusive technique offers more than 12 dB of enhancement in the isolation values and more than 70% improvement in the envelope correlation coefficient values, thus guaranteeing improved MIMO performance.

37 citations

Journal ArticleDOI
TL;DR: In this paper, a nine monopole antenna embedded in a dielectric cylinder mounted on a small ground plane has been designed for IEEE 802.11 applications and two simultaneous beams are controlled electronically with a front-to-back ratio of 12 dB and 13% bandwidth.
Abstract: A nine monopole antenna embedded in a dielectric cylinder mounted on a small ground plane has been designed for IEEE 802.11 applications. Two simultaneous beams are controlled electronically with a front-to-back ratio of 12 dB and 13% bandwidth. The dielectric reduced the footprint by 85% and the antenna volume by 91% compared to an array with similar functionality in air.

37 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023101
2022273
2021181
2020224
2019254
2018247