Effect of air gap on cylindrical dielectric resonator antenna operating in TM01 mode

Junker, G.P.; Kishk, A.A.; Glisson, A.W.; Kajfez, D.

doi:10.1049/el:19940114

Cited by 118 publications

(46 citation statements)

References 3 publications

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“…These describe antennas of dielectric material mounted on a ground plane with probes located either outside or inside the dielectric material itself. Air gaps cause changes in both resonant frequency and impedance levels; especially if the structure is designed for Xband frequencies or higher and the volume of the dielectric is small [17][18][19][20]. By using liquids; the authors in [16] avoid air gap losses.…”

Section: Introductionmentioning

confidence: 99%

Multi-Feed Dielectric Resonator Antenna With Reconfigurable Radiation Pattern

Fayad¹,

Record²

2007

PIER

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Abstract-This paper describes a steerable broadband dielectric antenna with 30% fractional bandwidth, operating at 11 GHz. The structure consists of a hollow cylindrical dielectric pellet of permittivity 6 fed by four probes. Two methods are described for beam forming: 1-Beam forming has been achieved by individually switching between excited probes. The switched excitation mechanism provides the antenna with a reconfigurable radiation beam that can be moved in the azimuth plane. 2-Variable phase excitation of several probes. Complete azimuth sweep was demonstrated by both methods, allowing any desired angle of beam directions. Simulation and experimental results are presented to illustrate the advantages of both designs.

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Section: Introductionmentioning

confidence: 99%

Multi-Feed Dielectric Resonator Antenna With Reconfigurable Radiation Pattern

Fayad¹,

Record²

2007

PIER

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“…A class of axially symmetric dielectric resonators excited by a coaxial probe extending into the dielectric material from below through a ground plane has been extensively investigated by surface integral equation methods [37]- [43]. Electric and magnetic equivalent surface currents are used as a basis to obtain a system of integrodifferential equations.…”

Section: Numerical Solutionmentioning

confidence: 99%

Electromagnetic Fields and Currents on Conducting Bodies Excited by Modulated Laser Light - Parts 1 & 2

Butler¹,

Martin²,

Kustepeli³

et al. 1999

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“…When a compact cylindrical sector DRA is compared with conventional CDRA, it is found that there is a decrement in volume by 75% [14]. The air gap has been introduced below the DRA to enhance the bandwidth [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…Several approaches have been investigated by researchers for bandwidth enhancement, such as changing the aspect ratio of DRA [5], using multi-element concept [6], using stacking and multi-segments [7][8][9][10], sectoring/splitting of the basic structure [11][12][13][14] and an air gap introduction below the DRA [15][16][17]. An experiment was performed by Petosa et al with multi-segment approach for rectangular DRA, to get wideband in which low dielectric material was inserted below the DRA [7].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Wideband Two Elements Dual Segment Half-Cylindrical Dielectric Resonator Antenna (Ds H-Cdra) With RCS Analysis

Ranjan¹,

Gangwar²,

Singh³

et al. 2018

PIER C

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Abstract-In this paper dual segment half Cylindrical Dielectric Resonator Antennas (DS h-CDRA), deploying homogenous elements, are designed and analyzed for wide-band applications. At first a single element is analyzed followed by two element DS h-CDRA. Further, Radar Cross Section (RCS) analysis is performed for different angles and frequencies. The proposed antennas are excited from the center of the ground plane using a coaxial probe feed, which results in TM 01δ as a mode of excitation in cylindrical DRA. The input impedance and radiation characteristics are determined and compared with measured results, which shows good agreement. The proposed DS h-CDRA provides measured wide bandwidth (≈ 98%) from 5.0 GHz to 11.5 GHz with gain of 4.85 dBi, and it is found constant throughout the operational band (with omnidirectional radiation pattern). The designed antennas performance has also been compared with two element h-CDRA and found even better for the same volume and effective radiation area. The RCS analysis has been performed for monostatic and bistatic mode at different frequencies and angles. The proposed antenna has been found suitable for 5.0 GHz WLAN and WiMAX wireless application.

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Effect of air gap on cylindrical dielectric resonator antenna operating in TM01 mode

Cited by 118 publications

References 3 publications

Multi-Feed Dielectric Resonator Antenna With Reconfigurable Radiation Pattern

Multi-Feed Dielectric Resonator Antenna With Reconfigurable Radiation Pattern

Electromagnetic Fields and Currents on Conducting Bodies Excited by Modulated Laser Light - Parts 1 & 2

Investigation of Wideband Two Elements Dual Segment Half-Cylindrical Dielectric Resonator Antenna (Ds H-Cdra) With RCS Analysis

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