New Approach to Definition of Potential of the Electric Field Created by Set Distribution in Space of Electric Charges

Ismibayli, Elshad Gulam; Islamov, I. J.

doi:10.1016/j.ifacol.2018.11.341

Cited by 17 publications

(9 citation statements)

References 2 publications

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“…As can be seen, the use of a standard distribution in the aperture makes it possible to obtain a radiation pattern whose side lobe envelope practically corresponds to the specified one. This radiation pattern corresponds to a "flat" directional coefficient calculated by the formula [16][17][18]…”

Section: Results Of Numerical Studiesmentioning

confidence: 99%

Computer simulation, visualization, and synthesis of a digital antenna array used for transmitting and receiving signals in industrial applications

Islamov

Hasanov

Ibrahimov

et al. 2023

Int. J. Microw. Wireless Technol.

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The article is devoted to computer modeling, visualization, and synthesis of a digital antenna array used for transmitting and receiving signals in industrial applications. The paper proposes an iterative method for the amplitude-phase synthesis of an antenna array according to the requirements for the envelope of the side lobes. The proposed method allows to determine the complex amplitudes of the elements of a digital antenna array for any given weight function, based on the theorems of matrix theory. The difference of the method lies in the iterative procedure for choosing the weight function, taking into account the excess level of the side lobes of the digital antenna array. In this regard, in the course of solving the synthesis problem, a weight function was found that leads to the fulfilment of the requirements for radiation patterns and does not lead to a decrease in the directivity coefficient. The signal-to-noise ratio was used as a criterion. For the first time, an analytical expression is given for the formation of a weight function in the course of an iterative process that takes into account the requirements for the envelope of the side lobes. The operability and convergence of the proposed method was confirmed in the course of numerical studies on the example of a digital antenna array. The performed numerical analysis confirmed the effectiveness of the proposed synthesis method.

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Section: Results Of Numerical Studiesmentioning

confidence: 99%

Computer simulation, visualization, and synthesis of a digital antenna array used for transmitting and receiving signals in industrial applications

Islamov

Hasanov

Ibrahimov

et al. 2023

Int. J. Microw. Wireless Technol.

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show abstract

“…are the azimuthal and axial components of the diffraction factor of the cylinder [19][20][21][22] for the nth array element, n=1,..., N, l0 is the length of the electric dipole, The coefficients and included in (12) and ( 13) are calculated according to the rules [8] (…”

Section: Mathematical Model and Calculation Methodsmentioning

confidence: 99%

General Approaches to Solving Problems of Analysis and Synthesis of Directional Properties of Antenna Arrays

Islamov

Humbataliyev

2022

AEM

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The work carried out the calculation and synthesis of antenna arrays used in radio-electronic complexes on unmanned aerial vehicles. The analytical model is designed to find asymptotic estimates of the polarization components of the electric field of the grating in the far zone of the carrier surface; the results obtained with its use are the initial data for constructing a technique for the numerical solution of a boundary value problem for a grating on a carrier surface in the CST MWS electrodynamic simulation environment. The synthesis of gratings with the maximum achievable coefficient of directional action is carried out with the control of radiation patterns at a given set of angles. A two-mirror antenna system has been calculated. It is shown that with an increase in the number of re-reflections taken into account, the convergence of the result for the calculated characteristics of the antenna is observed. To test the proposed method, the same antenna was calculated using the integral equation method. The comparison showed a high degree of agreement between the results obtained by two different methods. The results of the simulation based on a software algorithm designed to quantify the input matching at the input of a multichannel frequency-scanning antenna array power divider are presented. It was found that when performing wide-angle scanning in a relative frequency band of more than a few percent, the disadvantage of the known method for eliminating the normal effect is a sharp deterioration in matching in the lower and upper frequencies of the operating range. A new method is proposed based on an automated iterative process of optimizing the divider geometry, which makes it possible to obtain an acceptable match over the entire operating frequency band. The feasibility of switching from a serial power divider construction scheme to a series-parallel scheme is analyzed for wide-angle scanning in a relative frequency band of about 5%.

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“…Due to circular symmetry, ring antenna arrays make it possible to obtain almost circular (in the plane of the array) radiation patterns, as well as to form a scanning sector or even needle-shaped radiation patterns, the shape of which can be maintained unchanged when scanning in the XOY plane within 360° [10][11][12][13][14]. Microwave circular phased antenna arrays can provide circular scanning of radiation patterns with a very small angular step [15][16][17]. At the same time, traditional phased antenna arrays also have serious drawbacks -high thermal losses in semiconductor microwave phase shifters, which limit the efficiency and gain of phased antenna arrays, as well as the complexity of the control system [18][19][20][21].…”

Section: Formulation Of the Problemmentioning

confidence: 99%

A new approach to modeling a microwave antenna array with a phase radiation pattern

Hunbataliyev

2024

Eng. rev. (Online)

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In this paper, models of an annular antenna array have been developed and an analysis of the main characteristics of this antenna array has been carried out. The obtained results suggest that the considered variants of the microwave ring antenna array with discrete-switching scanning of the azimuthal radiation patterns, taking into account the weight, size and electrical characteristics, seem promising for use in the equipment of radio communication, radar and radio control systems. And also a method for correcting the distortions of the directional patterns of the developed annular antenna array, caused by the mutual influence of emitters, is proposed. To implement this technique, an algorithm has been developed for changing the amplitude distribution of the electromagnetic field strength from the phase distribution of the electromagnetic field strength to compensate for the distortion of parameters caused by the deviation of the beam of the radiation pattern.

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New Approach to Definition of Potential of the Electric Field Created by Set Distribution in Space of Electric Charges

Cited by 17 publications

References 2 publications

Computer simulation, visualization, and synthesis of a digital antenna array used for transmitting and receiving signals in industrial applications

Computer simulation, visualization, and synthesis of a digital antenna array used for transmitting and receiving signals in industrial applications

General Approaches to Solving Problems of Analysis and Synthesis of Directional Properties of Antenna Arrays

A new approach to modeling a microwave antenna array with a phase radiation pattern

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