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 article, a circularly polarised one-dimensional electromagnetic bandgap resonator antenna is demonstrated, which is generated by a sequentially rotated array of linearly polarised stripline slot antennas located in the ground plane of the device.
Abstract: A circularly polarised one-dimensional electromagnetic bandgap resonator antenna is demonstrated. Circular polarisation is generated by a sequentially rotated array of linearly polarised stripline slot antennas located in the ground plane of the device. The resonator antenna has the advantages of high gain, simple design and construction, very low sidelobes, good radiation pattern symmetry, and fairly constant boresight axial ratio across the operating bandwidth. Measured and computed results confirm the performance of the antenna.
48 citations
TL;DR: In this article, a novel wideband circularly polarized (CP) antenna with a stair-shaped dielectric resonator and an open-ended slot ground is introduced, which improves the impedance matching and enhances the axial-ratio (AR) bandwidth.
Abstract: A novel wideband circularly polarized (CP) antenna with a stair-shaped dielectric resonator and an open-ended slot ground is introduced. By adjusting parameter values of the hybrid structure, wideband CP characteristics can be realized. In order to improve the impedance matching and enhance the axial-ratio (AR) bandwidth, the open-ended slot is also inserted in the ground plane. The antenna is fully studied and manufactured. Measured results show that the proposed antenna has 10-dB return loss of 71.7% (3.844–8.146 GHz) and 3-dB AR bandwidths of 46.0% (4.15–6.63 GHz), respectively, and a peak gain of 3.9 dBic. In addition, more than 92% antenna radiation efficiency is obtained.
48 citations
TL;DR: In this article, the full implementation of a slot-fed frequency-reconfigurable rectangular dielectric resonator antenna (DRA) is described, where two conducting walls, on opposite vertical faces of the DRA, are switched via conducting tabs to be in contact or not with the groundplane.
Abstract: The full implementation of a slot-fed frequency-reconfigurable rectangular dielectric resonator antenna (DRA) is described. It uses two conducting walls, on opposite vertical faces of the DRA, which are switched via conducting tabs to be in contact or not with the groundplane. Theoretical and experimental performance results for such DRAs, using either PIN or varactor diode switches, are described, where prototypes were designed to operate between 3-8 GHz. The PIN diode-loaded and varactor-loaded DRAs achieved a tuning range of 91% and 55%, respectively, with other performance metrics detailed in the communication.
48 citations
Patent•
12 Nov 1999TL;DR: In this article, a silica microsphere or disk is used between two fiber optic cables (500, 502) to form an add/drop filter, which is resonant with the frequency to be added or dropped.
Abstract: A resonator (300), e.g., a silica microsphere or disk, is used between two fiber optic cables (500, 502) to form an add/drop filter. The resonator (300) is resonant with the frequency to be added or dropped. In this way, only that particular channel is added or dropped as needed.
48 citations
TL;DR: In this article, the cylindrical dielectric resonator antenna (DRA) is applied to the first omnidirectional circularly polarized (CP) diversity DRA, and the measured and simulation results are in reasonable agreement.
Abstract: The cylindrical dielectric resonator (DR) antenna (DRA) is excited in its omnidirectional TM $_{01\delta }$ mode by a planar shorted microstrip cross. With this nonintrusive feed, the DRA can be fabricated without the need of drilling a hole in the DR as required in the probe feed method. This DRA is applied to the first omnidirectional circularly polarized (CP) diversity DRA. To generate omnidirectional CP fields, the TM $_{01\delta }$ and TE $_{011+\delta }$ modes are excited simultaneously. The TE $_{011+\delta }$ mode is excited by four microstrip arcs. They provide a pair of equivalent magnetic dipoles that generate fields that are orthogonal to those of the TM $_{01\delta }$ mode. Omnidirectional CP fields can be obtained when the (orthogonal) fields of the TM $_{01\delta }$ and TE $_{011+\delta }$ modes are equal in amplitude but in phase quadrature. In our two-port CP diversity design, phase differences of +90° and −90° are obtained in ports 1 and 2 to generate right- and left-hand CP fields, respectively. Prototypes at ~2.4 GHz were designed, fabricated, and measured for WLAN applications. The S-parameters, radiation patterns, antenna gains, and efficiencies are studied. For the diversity design, the axial ratio, envelope correlation coefficient, and mean effective gain are also obtained. The measured and simulation results are in reasonable agreement.
48 citations