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Journal ArticleDOI

A User-Friendly Glueless Solution for Dielectric Resonator Antennas Using a Probe-Feeding Technique [Antenna Applications Corner]

TL;DR: In this paper, the glueless technology of a dielectric resonator antenna (DRA) was extended to its most popularly used probe-fed geometry to achieve a comprehensive solution in terms of adhesive-free stable deployment along with improved radiation characteristics.
Abstract: This article extends the glueless technology of a dielectric resonator antenna (DRA) to its most popularly used probe-fed geometry to achieve a comprehensive solution in terms of adhesive-free stable deployment along with improved radiation characteristics. Obtaining reduced cross-polarized (XP) fields through the glueless technique for commercial use is demonstrated in this article for the first time. It incorporates a single unit-shaped ground plane along with a pair of horizontal pins inserted through the DRA body and clamped with the metallic units of the structure. The study is based on the HEM11d mode, and the design maintains unperturbed modal characteristics. This has been experimentally verified for a 4-GHz antenna indicating as much as a 6-dBi gain with about a 12-dB reduction in cross-polar fields. This should find potential uses in practical applications.
Citations
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Journal ArticleDOI
TL;DR: In this paper , a glueless compact dual-port dielectric resonator antenna (DRA) is proposed for X-band applications, where four cylindrical copper rods with four strips are used to fix the DRA on the substrate and provide additional mechanical stability.
Abstract: In this dissemination, a glueless compact dual port dielectric resonator antenna (DRA) is proposed for X-band applications. A prototype has been fabricated with RT Duroid substrate and Eccostock (ϵr = 10)-made DRA. The ring shaped DRA is excited by aperture coupled feeds maintaining symmetry between both the ports. Four cylindrical copper rods with four strips have been used to fix the DRA on the substrate and provide additional mechanical stability. Eight copper strips are used to provide impedance matching and impedance bandwidth (IBW) widening. The measured IBW of dual port DRA is 10.5% (8.05–8.95 GHz) and maximum gain of radiator is 6.2 dBi. The proposed antenna becomes compact when the net volume of DRA is approximately 3.5 cm3 and the volume of the substrate is 2.88 cm3, with a surface area of 36 cm2 and operating in X-band, which finds applications in satellite communication, weather radar, synthetic aperture radar, and telemetry tracking and control.

1 citations

Proceedings ArticleDOI
01 Mar 2019
TL;DR: In this article, a mechanically stable no-adhesive rectangular DRA with vertical metallic pins placed strategically on the ground plane has been explored as clipping devise to ensure robust fixation of DRA without any glue.
Abstract: This work demonstrates for the first time the possibility of realizing a mechanically stable no-adhesive rectangular DRA, which has been a long standing demand for practical implementation. A simple ground plane with vertical metallic pins positioned strategically have been explored as clipping devise to ensure robust fixation of DRA without any glue. The study is based on the dominant TE $_{11\delta }$ mode and the proposed design maintains unperturbed modal and the radiation characteristics throughout the band. The design has been executed for a 3.6 GHz antenna indicating its stability in maintaining the said characteristics. As much as 6 dBi gain with about 30 dB co to cross polar isolation has been demonstrated.

1 citations


Cites background or methods from "A User-Friendly Glueless Solution f..."

  • ...Some recent investigations [4, 5] have established some glueless approaches for cylindrical DRA structures....

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  • ...The study has been conducted and established using a simple grounded substrate, unlike [4], where 2-unit compound ground plane (GP) or [5], where engineered thick grooved GP has been used....

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Proceedings ArticleDOI
12 Dec 2022
TL;DR: In this article , a simple technique of ground plane engineering to optimize the radiation characteristics of a Dielectric Resonator Antenna (DRA) is explored. But the work is limited to the Diagonal Plane.
Abstract: This work explores a simple technique of ground plane engineering to optimize the radiation characteristics of a Dielectric Resonator Antenna (DRA). It identifies the unruly fields in the corners of a ground plane, and subsequently discards the corners from a ground plane. This eventually leads to a uniform co-to-cross polar isolation over the entire azimuth. In addition, it helps in reducing the ground plane size by 20-25%, keeping all other antenna characteristics unchanged. This simple technique to XP reduction, especially over the Diagonal Plane should find potential applications in commercial usage.
DOI
10 Jul 2022
TL;DR: In this article , a glue-free hybrid DRA array which utilizes an unconventional radiating mode HEM12δ is presented, where special care has been exercised to realize the above mode in a cylindrical DRA to ensure a relatively higher gain over wide bandwidth.
Abstract: This work presents the design of a glue-free hybrid DRA array which utilizes an unconventional radiating mode HEM12δ. Special care has been exercised to realize the above mode in a cylindrical DRA to ensure a relatively higher gain over a wide bandwidth. A robust mechanism has also been investigated for mounting a 2×2 hybrid DRA array, which attains a gain of nearly 14 dBi together with a 10% operating bandwidth. Experimental validation of the proposed design has been included.
References
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Book ChapterDOI
15 Apr 2005
TL;DR: Linearly and circularly polarized conformal strip-fed dielectric resonator antennas (DRAs) are studied in this article, where a parasitic patch is used to excite a nearly degenerate mode.
Abstract: Linearly and circularly polarized conformal strip-fed dielectric resonator antennas (DRAs) are studied in this article. In the latter case, a parasitic patch is used to excite a nearly degenerate mode. The hemispherical DRA, excited in its fundamental broadside TE111 mode, is used for the demonstration. In the analysis, the mode-matching method is used to obtain the Green's functions, whereas the method of moments is used to solve for the unknown strip currents. In order to solve the singularity problem of the Green's functions, a recurrence technique is used to evaluate the impedance integrals. This greatly increases the numerical efficiency. Measurements were carried out to verify the calculations, with good results. Keywords: circularly polarized antenna; dielectric antennas; mode-matching methods; moment methods; parasitic antennas; resonance

898 citations


"A User-Friendly Glueless Solution f..." refers background in this paper

  • ...Traditionally, chemical adhesives are used to fix the elements on the DRA’s base ground plane [3], [4], which make its units vulnerable to being detached when jerked or vibrated, especially when they are used in spaceborne applications....

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Journal ArticleDOI
TL;DR: In this paper, a comprehensive review of the modes and the radiation characteristics of open dielectric resonators (DRs) of different shapes, such as cylindrical, spherical, and rectangular, is presented.
Abstract: Open dielectric resonators (DRs) offer attractive features as antenna elements. These include their small size, mechanical simplicity, high radiation efficiency due to no inherent conductor loss, relatively large bandwidth, simple coupling schemes to nearly all commonly used transmission lines, and the advantage of obtaining different radiation characteristics using different modes of the resonator. In this article, we give a comprehensive review of the modes and the radiation characteristics of DRs of different shapes, such as cylindrical, cylindrical ring, spherical, and rectangular. Further, accurate closed form expressions are derived for the resonant frequencies, radiation Q-factors, and the inside fields of a cylindrical DR. These design expressions are valid over a wide range of DR parameters. Finally, the techniques used to feed DR antennas are discussed. © 1994 John Wiley & Sons, Inc.

861 citations


"A User-Friendly Glueless Solution f..." refers background in this paper

  • ...DRAs, although they are an established class of low-profile and highly efficient radiators, suffer from inherent drawbacks [1], [2]....

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Journal ArticleDOI
TL;DR: In this paper, the authors present a historical review of the research carried out on dielectric resonator antennas (DRAs) over the last three decades and highlight major research activities in each decade.
Abstract: This article presents a historical review of the research carried out on dielectric resonator antennas (DRAs) over the last three decades. Major research activities in each decade are highlighted. The current state of the art of dielectric-resonator-antenna technology is then reviewed. The achievable performance of dielectric resonator antennas designed for compactness, wide impedance bandwidth, low profiles, circular polarization, or high gain are illustrated. The latest developments in dielectric-resonator-antenna arrays and fabrication techniques are also examined.

494 citations

Journal ArticleDOI
TL;DR: In this paper, the impact of using an ordinary adhesive material to bond a dielectric resonator antenna (DRA) to the ground plane to predict the potential variations in resonant frequency and impedance bandwidth of DRA was reported.
Abstract: This article reports the impact of using an ordinary adhesive material to bond a dielectric resonator antenna (DRA) to the ground plane to predict the potential variations in resonant frequency and impedance bandwidth of DRA. A set of aperture fed and monopole fed cylindrical DRAs have been analyzed at resonant frequencies of 2.4 and 8.9 GHz. For DRAs resonating at 2.4 GHz, an upward resonance frequency shift of 6.2% along with increase of 1.4 to 2% in impedance bandwidth have been observed. However, a significant shift of 12% in the resonant frequency and 17–20% increase in impedance bandwidth have been observed for DRAs operating at 8.9 GHz. End-fire TM01 mode has been excited in the DRAs, and it has been observed that the adhesive material has not affected the operating resonant mode. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1502–1506, 2014

33 citations


"A User-Friendly Glueless Solution f..." refers background in this paper

  • ...In addition, the glue may change the effective permittivity, affecting its resonance [5]....

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