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.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, the waveguide-fed dielectric resonator antenna (DRA) is proposed and investigated and the measured return loss, radiation patterns, and antenna gain of this novel configuration are discussed in this paper.
Abstract: In this communication, the waveguide-fed dielectric resonator antenna (DRA) is proposed and investigated. The waveguide is terminated by a baffle ground plane in which a coupling slot is cut, and the DRA resides above the coupling slot. To enhance the coupling, a second DR is placed on the other side of the slot inside the waveguide. The measured return loss, radiation patterns, and antenna gain of this novel configuration are discussed in this paper.
51 citations
TL;DR: A rectangular dielectric resonator antenna (DRA) that is excited using an outer-fed square spiral strip has been studied theoretically and experimentally as discussed by the authors, and the structure has been rigorously modeled using a method of moments (MoM) model.
Abstract: A rectangular dielectric resonator antenna (DRA) that is excited using an outer-fed square spiral strip has been studied theoretically and experimentally. Utilizing such excitation has provided a circular polarization over a broad bandwidth of ~14% in conjunction with an impedance-matching bandwidth of ~11%. The structure has been rigorously modeled using a method of moments (MoM) model. A good agreement has been attained between computed and measured results.
51 citations
TL;DR: In this paper, a double-layered high permittivity dielectric resonator (DR) was investigated at the 1.8 GHz band and the measured results showed that the double-layer DR antenna has a 1.2 dB gain enhancement and 25% height reduction over a single-layer antenna.
Abstract: A double-layered high permittivity dielectric resonator (DR) was investigated experimentally at the 1.8 GHz band. The measured results show that the double-layered DR antenna has a 1.2 dB gain enhancement and 25% height reduction over a single-layered antenna. The bandwidth is 2.7% and antenna gain is 6.2 dBi.
51 citations
01 Oct 2000
TL;DR: In this article, a reflectarray that uses a dielectric Resonator Antenna (DRA) as the radiating element has been developed at the Ka-band, where a variable length DRA provides the required phase shift at each cell on the reflectarray surface.
Abstract: A reflectarray that uses a Dielectric Resonator Antenna (DRA) as the radiating element has been developed at Ka-Band. A variable length DRA provides the required phase shift at each cell on the reflectarray surface. Experimental results for this configuration show a similar performance to reflectarrays based on microstrip patch antennas.
51 citations
TL;DR: Fayad et al. as discussed by the authors proposed a multiuserablebroadbanddielectricantennawith30% fractionalbandwidth, operating at 11GHz, with four different experiments.
Abstract: MULTI-FEED DIELECTRIC RESONATOR ANTENNAWITH RECONFIGURABLE RADIATION PATTERNH. Fayad and P. RecordSchoolofEngineeringandPhysicalSciencesHeriot-WattUniversityEdinburghEH144AS,Scotland,UKAbstract—Thispaperdescribesasteerablebroadbanddielectricantennawith30%fractionalbandwidth,operatingat11GHz. Thestructureconsistsofahollowcylindricaldielectricpelletofpermittivity6fedbyfourprobes.Twomethodsaredescribedforbeamforming:1-Beamforminghasbeenachievedbyindividuallyswitchingbetweenexcitedprobes. Theswitchedexcitationmechanismprovidestheantennawithareconfigurableradiationbeamthatcanbemovedintheazimuthplane. 2-Variablephaseexcitationofseveralprobes.Completeazimuthsweepwasdemonstratedbybothmethods,allowinganydesiredangleofbeamdirections. Simulationandexperimentalresultsarepresentedtoillustratetheadvantagesofbothdesigns.1. INTRODUCTIONThecommercialpressureofeverhigherdataratesandincreasesinuserdensityaredrivingtheantennadesignformobilewirelesscommunicatorstohavewide-bandresponsewithspatialability.Newerservices,suchasWiFiandultra-widebandaremovingintohigherfrequencybandstoallowgreaterchannelcapacity. FurthermoreisolationbyspatialagilityinthesamefrequencybandsmakethemsuitablecandidatesforMIMO(multipleinputmultipleoutputantennas)[1]. Asthefrequencyincreases,conductivityandsurfacewavelossesinpatchantennasincrease[2–6]. Whereasdielectricantennas,offcourse,havenoconductivitylossesanddielectriclosses.Therearearangeoflowlossdielectricmaterialsmakingthemanalternativetoconductiveantennas.DielectricResonatorantennashaveusefulpropertiessuchascompactsize[7],broadbandwidth[8,9];lowprofile[10],andhighradiationefficiency[7–11]. DRAswithnovelexcitationmechanismshavebeenreportedinliteraturetoachievewidebandwidths[12–16]. Thesedescribeantennasofdielectricmaterialmountedona
51 citations