Radiation and Resonant Frequency of Superconducting Annular Ring Microstrip Antenna on Uniaxial Anisotropic Media

Barkat, Ouarda; Benghalia, Abdelmadjid

doi:10.1007/s10762-009-9526-2

Cited by 33 publications

(34 citation statements)

References 17 publications

(21 reference statements)

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“…Furthermore, ring resonators have found applications in circulators, hybrid junction filters and other microwave devices [19]. Several articles on ring patches on uniaxial substrates has been recently published [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Specteral Domain Analysis of Resonant Characteristics and Radiation Patterns of a Circular Disk and Annular Ring Microstrip Antenna on Uniaxial Substrate

Motevasselian¹

2011

PIER M

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Abstract-A full-wave analysis for determining the resonant frequency, quality factor and far-zone radiation patterns of a circular disk and annular ring microstrip patches, printed on a uniaxial anisotropic substrate is presented. Green's functions of the structure are determined in Hankel transform domain (HTD) using Hertz potential vectors. Galerkin's method, together with parsval's relation in Hankel transform domain is then applied to compute the resonant frequency and quality factor. The far-zone radiation patterns are expressed in terms of Hankel transforms of the tangential fields on the substrate. Wave equation is solved in cylindrical coordinates for the structure to estimate the basis function. The numerical results show that there are substantial deviations in calculated resonant frequency and quality factor when substrate dielectric anisotropy is considered. Furthermore, significant variations are seen in the radiation patterns of the structures due to substrate anisotropy. The variations of resonant frequency, quality factor and radiation patterns of the structure, with respect to anisotropy ratio of the substrate, for several values of substrate thickness and patch radius are presented.

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Section: Introductionmentioning

confidence: 99%

Specteral Domain Analysis of Resonant Characteristics and Radiation Patterns of a Circular Disk and Annular Ring Microstrip Antenna on Uniaxial Substrate

Motevasselian¹

2011

PIER M

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“…After obtaining the dyadic Green's function of multilayered substrate by applying full-wave spectral domain technique, the function is modified by considering surface complex impedance [8].…”

Section: Dielectric Layersmentioning

confidence: 99%

“…α nq , β nm are the roots of dual equations ϕ n (α nq b/a) = 0 and ψ n (β nm b/a) = 0 Electric field is enforced to satisfy the impedance boundary condition on the annular ring patch, and the current vanishes off the patch, to give the following set of vector dual integral equations [8] …”

Section: Dielectric Layersmentioning

confidence: 99%

“…To enhance the accuracy of the numerical calculation, the integrals of the matrix elements (34)-(36) are evaluated numerically along an integration path deformed above the real axis (in the complex kρ plane) to avoid the singularities [8]. The resulting system of equations is then solved, for the unknown current modes on the HTS annular ring patch.…”

Section: Dielectric Layersmentioning

confidence: 99%

“…Microstrip antennas have some drawbacks such as narrow bandwidth and relatively low radiation efficiency [3]. In order to further improve the performance of microstrip antennas, it has been proposed to replace the conventional patch structures by high temperature superconducting (HTS) thin film [4][5][6][7][8]. Major property of superconductor is very low surface resistance compared with normal metals, such as copper, silver, and gold.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical Study of Superconducting Annular Ring Microstrip Antenna With Several Dielectric Layers

Barkat¹

2012

PIER

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Abstract-An analytical model is presented to investigate the performances of an annular-ring patch etched on a two layered dielectric substrate and is covered by a dielectric superstrate, by using a full-wave spectral domain technique in conjunction with the complex resistive boundary condition. Galerkin's method and Parseval's theorem are used to obtain the resonant frequency and bandwidth. To validate the theoretical results, a study has been performed for an annular-ring patch on a single layer, with air gap, and cover layer. The computed data are found to be in good agreement with results obtained using other methods. Variations of the resonant frequency and bandwidth with the high temperature superconducting (HTS) thin film are also presented. The proposed model is simple, accurate and thus should help a designer for practical applications.

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Fourier Transform Domain Analysis of High T c Superconducting Rectangular Microstrip Patch over Ground Plane with Rectangular Aperture

Chebbara

Benkouda

Fortaki

2010

J Infrared Milli Terahz Waves

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A rigorous full-wave analysis in the Fourier transform domain is carried out in order to obtain the resonant frequencies and half-power bandwidths of the high T c superconducting rectangular microstrip patches over ground planes with rectangular apertures. To include the effect of the superconductivity of the microstrip patch in the full-wave analysis, a complex surface impedance is considered. This impedance is determined by using London's equation and the two-fluid model of Gorter and Casimir. The validity of the solution is tested by comparison of the computed results with previously published data. Variations of the resonant frequency with the high T c superconducting film thickness are presented. Results showing the effect of the temperature on the resonant frequency and half-power bandwidth of the superconducting microstrip antenna with a rectangular aperture in the ground plane are also given. Finally, a comparison between the efficiency of two antennas is presented. For the first antenna, YBCO patch with YBCO ground plane are considered. For the second antenna, the patch and the ground plane are with copper.

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Radiation and Resonant Frequency of Superconducting Annular Ring Microstrip Antenna on Uniaxial Anisotropic Media

Cited by 33 publications

References 17 publications

Specteral Domain Analysis of Resonant Characteristics and Radiation Patterns of a Circular Disk and Annular Ring Microstrip Antenna on Uniaxial Substrate

Specteral Domain Analysis of Resonant Characteristics and Radiation Patterns of a Circular Disk and Annular Ring Microstrip Antenna on Uniaxial Substrate

Theoretical Study of Superconducting Annular Ring Microstrip Antenna With Several Dielectric Layers

Fourier Transform Domain Analysis of High T c Superconducting Rectangular Microstrip Patch over Ground Plane with Rectangular Aperture

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