Circularly polarized rectangular dielectric resonator antennas with branch-line coupler for wideband applications

Rahimian, Zahra; Nikmehr, Saeid; Pourziad, Ali

doi:10.1016/j.aeue.2014.08.009

Cited by 11 publications

(9 citation statements)

References 19 publications

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“… Different feeding approaches reported for circular polarization: A, 45° inclined feed; B, dual conformal; C, parasitic patch; D, helix conductor; E, branch‐line coupler…”

Section: Dras Related To Circular Polarizationmentioning

confidence: 99%

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

Dash

Khan

Antar

2018

Int J RF Microw Comput Aided Eng

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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.

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“… Different feeding approaches reported for circular polarization: A, 45° inclined feed; B, dual conformal; C, parasitic patch; D, helix conductor; E, branch‐line coupler…”

Section: Dras Related To Circular Polarizationmentioning

confidence: 99%

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

Dash

Khan

Antar

2018

Int J RF Microw Comput Aided Eng

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“…Broadly, these approaches can be divided into four categories; firstly, according to the antenna geometry (DR shape/fractal/EBG/metamaterial), secondly, the coupling mechanism (feeding type/aperture shape), thirdly, the DR permittivity, and lastly, according to the excitation of specific mode. From ease of readers' point of view, these techniques are discussed separately for single‐band, dual‐band, and multi‐band,, respectively. Moreover, some other characteristics say radiation/notch…”

Section: Dra Research On Bandwidthmentioning

confidence: 99%

“…Next to DRA shape, the coupling mechanism plays an important role in controlling performance characteristics of DRA. This technique is also known as bandwidth improvement by means of impedance matching and this can be established either by modification in feeding line or slot types …”

Section: Dra Research On Bandwidthmentioning

confidence: 99%

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Recent developments in bandwidth improvement of dielectric resonator antennas

Dash

Khan

2019

Int J RF Microw Comput Aided Eng

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This article shows a compressed chronological overview of dielectric resonator antennas (DRAs) emphasizing the developments targeting to bandwidth performance characteristics in last three and half decades. The research articles available in open literature give strong information about the innovation and rapid developments of DRAs since 1980s. The sole intention of this review article is to, (a) highlight the novel researchers and to analyze their effective and innovative research carried out on DRA for the furtherance of its performance in terms of only bandwidth and bandwidth with other characteristics, (b) give a practical prediction of future of DRA as per the past and current state-of-art condition, and (c) provide a conceptual support to the antenna modelers for further innovations as well as miniaturization of the existing ones. In addition some of the significant observations made during the review can be noted as follows; (a) hybrid shape DRAs with Sierpinski and Minkowski fractal DRAs seems comfortable in obtaining wideband as well as multiband, (b) combination of multiple resonant modes (preferably lower modes) can lead to wider impedance bandwidth, (c) at proper matching wider patch with slotted dielectric resonator can exhibit better bandwidth.

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“…Their study on the dielectric resonator antenna gave a suitable substitute over traditionally used low gain antenna elements. After carrying out an investigation of cylindrical DRA, Long and colleagues carried out research on other DRA shapes such as rectangle and hemisphere [6][7][8][9]. Design flexibility in terms of shape and feeding mechanisms makes DRA the first choice of antenna designers.…”

Section: Introductionmentioning

confidence: 99%

Two-Layer Sapphire Rectangular Dielectric Resonator Antenna for Rugged Communications

Bakshi¹,

Vaish²,

Yaduvanshi³

2019

PIER Letters

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This paper presents a stacked rectangular dielectric resonator antenna design. In this structure, two sapphires having the same dielectric constant and different dimensions piled over each other have been used for designing the proposed antenna. The designed antenna exhibits two frequency bands from 7.41 GHz to 8.21 GHz and 9.11 GHz to 12.65 GHz and impedance matching of 50 ohms. The proposed antenna design is a fine choice for subterranean and rugged communication, in addition, owing to sapphires unique features viz. durability, endurance, and aversion to physical change. The antenna structure is aperture coupled. Due to the advantage of aperture coupled feed mechanism such as good isolation between antennas and feed networks it has been employed. The antenna prototype has been fabricated, measured, and tested using Vector Network Analyzer and Anechoic Chamber to validate the proposed antenna design. The simulation results obtained indicate close proximity of tested result.

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Circularly polarized rectangular dielectric resonator antennas with branch-line coupler for wideband applications

Cited by 11 publications

References 19 publications

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

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

Recent developments in bandwidth improvement of dielectric resonator antennas

Two-Layer Sapphire Rectangular Dielectric Resonator Antenna for Rugged Communications

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