Experimental Study of Characteristics of Microwave Devices Transition From Rectangular Waveguide to the Megaphone

Islamov, I. J.; Ismibayli, Elshad Gulam

doi:10.1016/j.ifacol.2018.11.313

Cited by 21 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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%

“…where is the longitudinal wavenumber [20], is the Hankel function of the second kind of the m-th order, is its derivative concerning the variable r at the point r = a. Thus, expressions (1), ( 2) and ( 11)-( 15) make it possible to analyze the radiation patterns of an array of electric vibrators on the side surface of a perfectly conducting cylinder of finite length.…”

Section: Mathematical Model and Calculation Methodsmentioning

confidence: 99%

“…(5), by analogy with the synthesis criterion [20], we define the system of equations (16) According to the method of indefinite Lagrange multipliers, the currents of the antenna elements in ( 1) and ( 3), ensuring the achievement of the maximum directivity at Q fixed levels of the array radiation patterns, satisfy the parametric distribution corresponding to the minimum of the functional (17) where are indefinite Lagrange multipliers, acting as parameters of complex current amplitudes.…”

Section: A Methods For Synthesizing An Antenna Array With a Maximum D...mentioning

confidence: 99%

See 2 more Smart Citations

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

Islamov

Humbataliyev

2022

AEM

View full text Add to dashboard Cite

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%.

show abstract

Section: Mathematical Model and Calculation Methodsmentioning

confidence: 99%

Section: Mathematical Model and Calculation Methodsmentioning

confidence: 99%

Section: A Methods For Synthesizing An Antenna Array With a Maximum D...mentioning

confidence: 99%

See 1 more Smart Citation

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

Islamov

Humbataliyev

2022

AEM

View full text Add to dashboard Cite

show abstract

“…The boundary conditions on an ideally conducting surface for the tangential and normal components of the electric field [18], in this case lead to the equation …”

Section: Symmetrical E-wavesmentioning

confidence: 99%

“…The possibility of calculating the characteristics of waveguides with filling described by arbitrary analytical functions makes it possible to pose problems of parametric synthesis aimed at the implementation of devices with given characteristics. In addition, algorithms for calculating inhomogeneously filled circular waveguides can be used to study gradient optical fibers [13][14][15][16][17][18][19][20][21]. This paper proposes a method for calculating the characteristics of wave propagation of a circular shielded waveguide with a radially inhomogeneous dielectric filling, based on a modified Galerkin method as a variant of the spectral method.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of characteristics of propagation of symmetric waves in microwave circular shielded waveguide with a radially inhomogeneous dielectric filling

Islamov

Hunbataliyev

Zulfugarli³

2021

Int. J. Microw. Wireless Technol.

Self Cite

View full text Add to dashboard Cite

The paper presents a numerical simulation of the propagation characteristics of symmetric E-type and H-type waves in microwave circular shielded waveguide with radially inhomogeneous dielectric filling. Using the modified Galerkin method, the calculation of a circular two-layer shielded waveguide was carried out, as a result of which the distribution of the electromagnetic field of the waveguide with linear and parabolic distribution of permeability was determined. The results obtained using the modified Galerkin method were compared with the results obtained using the classical partial domain method, which agree well enough.

show abstract

Modelling of a Microwave Rectangular Waveguide with a Dielectric Layer and Longitudinal Slots

Islamov

Hunbataliyev

Abdullayev

et al. 2021

Lecture Notes in Mechanical Engineering

View full text Add to dashboard Cite

Experimental Study of Characteristics of Microwave Devices Transition From Rectangular Waveguide to the Megaphone

Cited by 21 publications

References 0 publications

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

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

Numerical simulation of characteristics of propagation of symmetric waves in microwave circular shielded waveguide with a radially inhomogeneous dielectric filling

Modelling of a Microwave Rectangular Waveguide with a Dielectric Layer and Longitudinal Slots

Contact Info

Product

Resources

About