Modelling of dielectric resonator antennas using numerical methods: a review

Int J RF Microw Comput Aided Eng

Antar

2018

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This article outlines a compressive review on investigation carried out targeting to gain, circular polarization (CP), and mutual coupling reduction in dielectric resonator antenna (DRA). The DRA has already been created a separate position in antenna engineering domain because of its adept characteristics, such as wide bandwidth, high efficiency, low‐loss, and mainly 3D‐design flexibility which is rarely available in conventional antennas. In this context, the research on gain, circular polarization, and mutual coupling are quite interesting and being carried out from the last two decades. The ultimate aim of this article is to (i) give an overview of different techniques adopted in context to gain, CP, and mutual coupling reduction; (ii) give a compressive review of notable research carried out targeting to these three characteristics; and (iii) find out the research gap concentration for furtherance of the same.

Section: Introductionmentioning

confidence: 99%

A state-of-art review on performance improvement of dielectric resonator antennas

Int J RF Microw Comput Aided Eng

Antar

2018

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“…As per current scenario, dielectric resonator antenna (DRA) has been got extreme attention from antenna researchers in microwave as well as millimeter wave engineering . The extraordinary techno facts like; wideband, high radiation efficiency, low loss, ease of excitation, and 3‐dimensional design flexibility than conventional antennas, have made it an unique radiator in electromagnetic (EM) field. In practical, most of the modern long distance communications need high gain ∼10 dBi, which are generally not reachable by standard DRAs because of medium gain ∼ 5dBi .…”

Section: Introductionmentioning

confidence: 99%

Wideband high gain conical dielectric resonator antenna: An experimental study of superstrate and reflector

Int J RF Microw Comput Aided Eng

2017

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A physically feasible new hybrid geometry for gain improvement with wideband characteristics is designed and validated experimentally in a conical shaped dielectric resonator antenna (DRA). It comprises of one superstrate and one reflector, with simple slot coupling technique for excitation. The reflector beneath the ground plane mainly accountable for significant gain improvement (∼109%) by reducing the back radiation, whereas the superstrate dedicates for maintaining wideband (12.65%). The demonstrated result shows S11 < −10 dB band between 7.4 GHz and 8.4 GHz, with 11.25 dBi peak gain, which are well matched with their simulated counter parts. It also gives high co‐pol to cross‐pol difference (∼40 dB) in broadside direction. This new geometry can be eligible for X‐band applications as well can usher the DRA researchers for further innovations.

“…Recently dielectric resonator antenna (DRA) has become the point of analysis among the antenna researchers for wireless applications [1][2][3]. The low loss, high radiation efficiency, wideband, three-dimensional design as well as excitation flexibility, etc.…”

Section: Introductionmentioning

confidence: 99%

Wideband cylindrical dielectric resonator antenna operating in HEM<inf>11δ</inf> mode with improved gain: An effect of superstrate and parasitic sheet

2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)

2017

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A compact slot-coupled dielectric resonator antenna is designed, fabricated, and characterized. A narrow transparent non-metal superstrate and parasitic sheets are used to improve the far-field characteristics like: gain, co-pol and cross-pol. The antenna operates over 17.71% bandwidth (6.95-8.3) GHz with ~8 dBi peak gain and at the same time it maintains a separation of 45 dB, 20 dB between co-pol and cross-pol in H-plane and E-plane, respectively. The efficiency of the proposed antenna is above 85% in the operating band. The measured results shows fairly good matching with their simulated counterparts. The performance of the antenna shows its potential for X-band wireless applications.