Evaluation of an accuracy of determination of amplitude-phase distribution in elements of phased antenna array when measuring dynamic near field amplitude

Methods of microwave diagnostics of a phased array allow reconstructing the amplitude-phase distribution in the antenna and implement on this basis methods for adapting the lattice control to those found in the amplitude-phase distribution to defects. The methods of microwave diagnostics from the near zone described in the well-known literature are realizable only in anechoic chambers or on specially equipped training grounds. To solve the problems of adapting a phased antenna array to a technical state and increasing its operating time under extreme conditions, it is necessary to have methods of integrated microwave diagnostics of a phased antenna array at its location. The aim of the article is to develop a method for microwave diagnostics of a phased array antenna, implemented from the near zone of the antenna at its location, and eliminating the influence of echo signals (ES) on the diagnostic results. The article proposes a method for microwave diagnostics of a phased array antenna from the near field, which allows to exclude the influence on the accuracy of diagnostics of the echo signal present at the measuring site and errors in the positioning of the measuring probe. The proposed method will make it possible to implement microwave diagnostics of the antenna from the near field at its location. The results of microwave diagnostics are supposed to be used to implement various methods of adapting a phased array to a technical condition, significantly increasing its life

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AMPLITUDE-PHASE DISTRIBUTION MEASUREMENT PLANE DIMENSIONS INFLUENCE ON THE HOLOGRAPHIC METHOD ANTENNA ARRAY RADIATION PATTERN RECONSTRUCTION ERRORS

Doklady BGUIR ◽

10.35596/1729-7648-2020-18-1-5-13 ◽

2020 ◽

pp. 5-13

Author(s):

O. A. Yurtsev ◽

R. Ch. Shimanouski

Keyword(s):

Antenna Array ◽

Radiation Pattern ◽

Phase Distribution ◽

Near Field ◽

Amplitude Distribution ◽

Holographic Method ◽

Longitudinal Zone ◽

Measurement Plane ◽

Measurement Surface ◽

The Cost

The article explores the holographic method of measuring the antenna pattern. A flat antenna array is used as the antenna under test, and a planar rectangular surface is used as the surface on which the amplitudephase distribution in the near field is measured. Using the example of a flat antenna array, we consider the influence of the size of the measurement surface of the amplitude-phase distribution of the field in a plane orthogonal to the reconstruction plane of the radiation pattern. Antenna emitters are excited with a combined amplitude distribution and linear phase distribution. The field in the longitudinal zone of the lattice is determined using the Kirchhoff integral. The reconstructed radiation patterns are estimated using the amplitude-phase distribution over the entire measurement plane in comparison with the array radiation pattern in the far zone. A numerical analysis of the influence on the errors in determining the parameters of the lattice radiation pattern using the holographic method is also carried out: the number of columns of the amplitude-phase distribution on the measurement plane, the position of this plane in three coordinates relative to the plane of the aperture of the lattice. It is shown that if the spacing of the points of measurement of the amplitude-phase distribution and the pitch of the lattice are equal, to restore the radiation pattern using the holographic method, it is sufficient to use one column of the amplitude-phase distribution on the measurement plane. This greatly simplifies and reduces the cost of the measurement process and the necessary equipment. Examples of determining errors in measuring the parameters of the antenna array when shifting the plane of measurement of the amplitude-phase distribution in three coordinates are given.

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Reconstruction of the amplitude-phase distribution of the field of the received signal in the aperture of a phased antenna array from the measured power

Journal of Communications Technology and Electronics ◽

10.1134/s106422690909006x ◽

2009 ◽

Vol 54 (9) ◽

pp. 1003-1008

Author(s):

M. V. Samoilenko

Keyword(s):

Antenna Array ◽

Phase Distribution ◽

Phased Antenna Array ◽

Measured Power

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Method of forming and scaling phased array expanded beams

Journal of «Almaz – Antey» Air and Defence Corporation ◽

10.38013/2542-0542-2019-3-19-29 ◽

2019 ◽

pp. 19-29

Author(s):

A. N. Gribanov ◽

S. E. Gavrilova ◽

O. V. Pavlovich ◽

G. F. Moseychuk ◽

A. N. Titov

Keyword(s):

Antenna Array ◽

Phased Array ◽

Phase Distribution ◽

Amplitude Distribution ◽

Scaling Factor ◽

Beam Shape ◽

Diagram Method ◽

Phase Synthesis ◽

Scaling Properties ◽

Phased Antenna Array

The paper focuses on the phase synthesis of one-dimensionally expanded phased array beams. In the study we used the fan partial diagram method. By this method and applying the known amplitude distribution in the aperture and the desired beam shape, we were able to unambiguously determine the desired phase distribution by means of simple calculations. The method is applicable for a phased antenna array and an active phased antenna array with linear and flat apertures. The study is the first to discuss the scaling properties of expanded beams, which allow one to obtain many synthesis options from only one option by multiplying the phase distribution by the scaling factor. Four important properties of scaling are formulated and proved, which must be taken into account when scaling. The paper gives the results of mathematical simulation and experimental measurements, proving the efficiency of the method

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Methods of measuring the parameters and fault diagnosis phased antenna array in the near field without the use of mechanical positioners

Journal of «Almaz – Antey» Air and Defence Corporation ◽

10.38013/2542-0542-2015-3-36-42 ◽

2015 ◽

pp. 36-42

Author(s):

N. E. Nenartovich ◽

V. A. Balagurovsky ◽

A. O. Manichev

Keyword(s):

Fault Diagnosis ◽

Antenna Array ◽

Antenna Arrays ◽

High Efficiency ◽

Near Field ◽

Practical Importance ◽

Phased Antenna Arrays ◽

Phased Antenna Array

The problem of measuring the parameters of phased antenna arrays without mechanical displacements of the test and / or the auxiliary antenna. Examples demonstrating the high efficiency and practical importance of this approach to measurement.

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