Optimisation of Radiation Characteristics of Wire-Screened Antennas

Gorobets, N. N.; Yeliseyeva, N. P.; Antonenko, Yevhenii

doi:10.1615/telecomradeng.v71.i1.60

Cited by 7 publications

(4 citation statements)

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“…where Θ = x, y, (ρ, θ, f) are coordinates of the spherical coordinate system, θ is the polar angle, w is the azimuthal angle, A sw Q and D sw Q are that parts of the Fourier amplitudes A Q and D Q , which correspond to the spherical waves. They can be obtained from (10), (13) after regularization of integrals.…”

Section: Numerical Resultsmentioning

confidence: 99%

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Scattering by PEC half-plane and disk placed on parallel planes

Калиберда

Lytvynenko

Pogarsky

2022

Int. J. Microw. Wireless Technol.

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The scattering by the perfectly electric conducting (PEC) half-plane and PEC zero thickness disk placed on parallel planes is considered. The fields are represented in the spectral domain, i.e. in the domain of Fourier transform. The operator equations with respect to the Fourier amplitudes of the scattered field are obtained. The kernel functions of these equations contain poles. After regularization procedure, which is connected with the elimination of the poles, operator equations are converted to the system of singular integral equations. The convergence of the solution is based on the corresponding theorems. The scattered field consists of the plane wave, reflected by the infinite part of the half-plane, cylindrical waves, which appear as a result of scattering by the edge of the half-plane, and spherical waves, which appear as a result of scattering by the disk and multiple re-scattering by the disk-half-plane. The total near-field distribution and far-field patterns of cylindrical waves are presented.

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Section: Numerical Resultsmentioning

confidence: 99%

“…In [9], high-frequency asymptotic for the solution of scattering of an arbitrary 2D field is obtained. In [10, 11], the solution for the half-plane is used to obtain the asymptotic expressions for the antenna modeling.…”

Section: Introductionmentioning

confidence: 99%

Scattering by PEC half-plane and disk placed on parallel planes

Калиберда

Lytvynenko

Pogarsky

2022

Int. J. Microw. Wireless Technol.

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“…The UGTD developed in [6] for three-dimensional diffraction problems of an arbitrarily oriented perfectly conducting half-wave vibrator field on the perfectly conducting infinitely thin finite size rectangular screen, and on the corner reflectors of various configurations, has been used to calculate the amplitude and polarization patterns of radiating systems. Experimental studies in the centimeter wavelength [6,8] have confirmed the high degree of reliability of the radiation patterns calculated by UGTD method for half-wave vibrator over the rectangular screen, with sides equal to the wavelength.…”

Section: Introductionmentioning

confidence: 86%

Electrodynamic Characteristics of Horizontal Impedance Vibrator Located Over a Finite-Dimensional Perfectly Conducting Screen

Yeliseyeva¹,

Berdnik²,

Katrich³

et al. 2015

PIER B

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A problem of electromagnetic waves radiation by an impedance vibrator located over finitedimensional perfectly conducting screen is solved. The vibrator may have surface impedance distributed over its length. The solution is derived using asymptotic expressions for the current in a horizontal impedance vibrator placed over an infinite plane, obtained by averaging method. The problem was solved provided that the diffracted fields from the edges of the screen have little effect on the vibrator current amplitude, i.e., if the screen dimensions are comparable to or larger than the wavelength. Full radiation fields in all observation space in the far zone were found by the uniform geometrical theory of diffraction. The vibrator dimensions, value and type of surface impedance, removing from the screen and screen sizes were used as parameters. The multivariable electrodynamic characteristics of the resonant impedance vibrators placed above an infinite plane and square screen were studied. Characteristics dependences upon the vibrator dimensions, value and type of the surface impedance, removing from the screen, and screen dimensions were obtained.

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“…In comparison with l 0 of the dipoles in free space, the resonant length shortening is greater in the case of dipole parallel to the screen than in the case of dipole perpendicular to the one. In the experimental test [3] the shortening of a resonant dipole, at l/а=13, parallel to the screen with dimensions 0.47λ× 0.63λ at a suspension height h=0.25λ equaled 11.1%. From the calculation of l 0 of a monopole placed on the square screen it follows that when screen size less 1.5λ takes place oscillating dependence of the l 0 and the amplitude of the oscillation l 0 relatively to l 0∞ in case of infinite screen is greater for thick dipoles [4].…”

Section: Introductionmentioning

confidence: 99%

Influence of mutual coupling between two dipoles on their resonant length in metal screen presence

Yeliseyeva

2012

2012 6th International Conference on Ultrawideband and Ultrashort Impulse Signals

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On the base of the induced electromotive forces method with using the uniform geometrical theory of diffraction fast algorithms and codes for calculating the input impedance and the resonant length of two connected in phase electric dipoles placed above a thin metal rectangular screen at parallel orientation to it and an arbitrary locating of the dipoles from each other are developed. From analysis follows that the shortening of the resonant dipole length is bigger than for two parallel dipoles in free space but is smaller than the length shortening of single dipole above the screen. Fig. 2. The relative resonant arm length l 0 /λ and corresponding radiation resistance R Σopt of each from two connected dipoles placed above the screen versus of l/a and ξ/λ.

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Optimisation of Radiation Characteristics of Wire-Screened Antennas

Cited by 7 publications

References 0 publications

Scattering by PEC half-plane and disk placed on parallel planes

Scattering by PEC half-plane and disk placed on parallel planes

Electrodynamic Characteristics of Horizontal Impedance Vibrator Located Over a Finite-Dimensional Perfectly Conducting Screen

Influence of mutual coupling between two dipoles on their resonant length in metal screen presence

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