scholarly journals Method of forming and scaling phased array expanded beams

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

scholarly journals DIAGNOSTICS OF HEADLIGHTS FROM NEAR AREA ON PLACE OF BASING

2020 ◽  
Vol 3 (61) ◽  
pp. 124-127
Author(s):  
O. Besova ◽  
V. Karlov ◽  
O. Lukashuk ◽  
I. Petryshenko
Keyword(s):  
Antenna Array ◽  
Phased Array ◽  
Phase Distribution ◽  
Near Field ◽  
Operating Time ◽  
Array Antenna ◽  
Phased Array Antenna ◽  
Phased Antenna Array ◽  
Near Zone ◽  
Microwave Diagnostics

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

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

Doklady BGUIR ◽  
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.

scholarly journals Radar station with digital axisymmetric active phased antenna array as a promising direction for the development of surveillance radars

2017 ◽  
pp. 37-45
Author(s):  
M. V. Indenbom ◽  
R. L. Makhlin
Keyword(s):  
Service Life ◽  
Antenna Array ◽  
Phased Array ◽  
Time Increase ◽  
Promising Direction ◽  
Radar Station ◽  
Operating Modes ◽  
Phased Antenna Array ◽  
Mechanical Rotation ◽  
Antenna Systems

The purpose of the study was to build a surveillance radar station (radar) with an axisymmetric (i.e. cylindrical, conical, etc.), multibeam receiving-transmitting active phased array (APAR) and investigate its characteristics. The radar station makes it possible to shorten the surveillance time, increase the rate of updating information, provide flexibility in changing operating modes, increase the reliability and service life of a radar station as compared to a radar station with mechanical rotation of antenna systems. The radar station is compared with electronic circular scanning based on cylindrical, three- and tetrahedral APAR

scholarly journals Theoretical analysis and experimental measurement of digital multi-beam phased antenna array in the C frequency range

2019 ◽  
Vol 59 (1) ◽  
Author(s):  
Lu Guoming ◽  
Petr N. Zakharov ◽  
Anatoliy F. Korolev
Keyword(s):  
Antenna Array ◽  
Experimental Measurement ◽  
Relative Frequency ◽  
Phased Array ◽  
Far Field ◽  
Experimental Sample ◽  
Frequency Bandwidth ◽  
Microstrip Technology ◽  
Phased Antenna Array ◽  
Point To Point

The choice of elements for constructing a phased antenna array providing a relative frequency bandwidth up to 9% for the transmission or reception of wireless communication system information was made. Superposition of the excitation signals of a flat phased antenna array for a simultaneous emission of several independent beams in a radiation far field was used. Calculation and optimization of the progressive distribution of phase shifts in the excitation signal group in the horizontal and vertical directions of the phased array plane for the radiation (reception) of independent beams in spherical coordinates (azimuth and elevation) in space was performed. An experimental sample of the phased antenna array was developed using microstrip technology, which forms several beams in the radiation far field. An experimental measurement of the voltage standing wave ratio and relative frequency bandwidth of the sample developed by phased array microstrip and printing technology was carried out. The multi-beam phased antenna array will increase the number of subscribers for multi-user systems, as well as increase the energy efficiency for point-to-point communication by transmitting over multiple spatial trajectories.

scholarly journals Application of the transmit active phased array antenna in a radar complex of the sensing of the lunar soil.

2021 ◽  
Author(s):  
D.A. Semenov ◽  
Keyword(s):  
Antenna Array ◽  
Phased Array ◽  
Lunar Soil ◽  
Array Antenna ◽  
Radar Signal ◽  
Phased Array Antenna ◽  
Active Mode ◽  
Phased Antenna Array

The principles of radar sounding of lunar soil are revealed. The characteristics of the receiving-transmitting active phased antenna array and the possibility of its use in the transmission/reception of the probing radar signal in the study of lunar soil in the active mode from the flight scientific module are analyzed.

PRINTED DIPOLE 8-BEAM ANTENNA ARRAY WITH CHART-FORMING MATRIX BUTLER ON CONNECTED STRIP LINES

2019 ◽  
pp. 65-70 ◽  
Author(s):  
A. P. Gorbachev ◽  
Yu. N. Parshin
Keyword(s):  
Computer Simulation ◽  
Antenna Array ◽  
System Analysis ◽  
Phased Array ◽  
High Efficiency ◽  
Phased Array Antenna ◽  
Butler Matrix ◽  
Radar Systems ◽  
Phased Antenna Array ◽  
Strip Lines

The results of the analysis of the printed 8-beam antenna array with an operating frequency of 2.2 GHz are presented. Charting devices made on the basis of the Butler matrix are widely used in modern telecommunication and radar systems and complexes. Forming in space a fan of independent radiation patterns, such arrays provide both scanning in azimuth and elevation and switching several transmitters to different directions. This ensures a high efficiency of a multipath planar phased antenna array, and reduces its overall dimensions. To test the features of the implementation of the 8-input Butler matrix, an eight-beam dipole phased array antenna was modeled. The results of the system analysis and computer simulation showed that it is possible to print the antenna with acceptable performance.

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