Efficient Evaluation of Green's Functions for Lossy Half-Space Problems

Firouzeh, Zaker Hossein; Vandenbosch, Guy A. E.; Moini, R.; Sadeghi, S.H.H.; Faraji‐Dana, Reza

doi:10.2528/pier10062310

Cited by 22 publications

(17 citation statements)

References 64 publications

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“…However, the accuracy of these approximate models is limited and only suitable for analysing simple, regularly shaped antenna or thin substrates. The full-wave spectral domain technique is extensively used in microstrip analysis and design [18][19][20][21]. This method gives better results than approximate techniques.…”

Section: Introductionmentioning

confidence: 99%

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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Section: Introductionmentioning

confidence: 99%

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

Barkat¹

2012

PIER

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“…Since Equation (8) cannot be evaluated in closed form, we perform its saddle-point asymptotic evaluation [10,11]. In order to correctly calculate the integral, we must consider the steepest descent path (SDP) to include any pole residue.…”

Section: Intrinsic Cancellation Of the Surface Wave On A Positive Elementioning

confidence: 99%

Negative Permittivity Media Able to Propagate a Surface Wave

Petrillo¹,

Jangal²,

Darces³

et al. 2011

PIER

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Abstract-In the field of High Frequency Surface Wave Radar (HFSWR), this paper deals with a study which determines the electric permittivity and conductivity values that a medium must hold to propagate a sole surface wave at its interface with air. Firstly, we demonstrate clearly the reason why the Zenneck Wave cannot be excited on sea surface. Kistovich decomposition is used for this purpose. Secondly, the reasoning is extended to identify electric permittivity and conductivity values that permit to excite a surface wave on an homogeneous medium. Finally, numerical validation is obtained by comparison with the analytic formulation of the field radiated by a vertical Hertzian dipole as it has been established by Norton.

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“…According to a recent review paper [17], the resulting algorithm has proven to perform in a comparable or even a better way than the most popular extrapolation methods used for Sommerfeld tails. Often, numerical integration of Sommerfeld integral tails is used as reference for the evaluation of multilayered Green's functions by various other methods [18,19]. But the usefulness of this method may go well beyond Sommerfeld integrals as already hinted in the exhaustive monograph by Homeier [20].…”

Section: Introductionmentioning

confidence: 99%

Acceleration of Slowly Convergent Series via the Generalized Weighted-Averages Method

Polimeridis¹,

Niciforovi²,

Mosig³

2010

PIER M

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Abstract-A generalized version of the weighted-averages method is presented for the acceleration of convergence of sequences and series over a wide range of test problems, including linearly and logarithmically convergent series as well as monotone and alternating series.This method was originally developed in a partitionextrapolation procedure for accelerating the convergence of semiinfinite range integrals with Bessel function kernels (Sommerfeld-type integrals), which arise in computational electromagnetics problems involving scattering/radiation in planar stratified media. In this paper, the generalized weighted-averages method is obtained by incorporating the optimal remainder estimates already available in the literature. Numerical results certify its comparable and in many cases superior performance against not only the traditional weighted-averages method but also against the most proven extrapolation methods often used to speed up the computation of slowly convergent series.

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Efficient Evaluation of Green's Functions for Lossy Half-Space Problems

Cited by 22 publications

References 64 publications

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

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

Negative Permittivity Media Able to Propagate a Surface Wave

Acceleration of Slowly Convergent Series via the Generalized Weighted-Averages Method

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