RU2582087C1 - Method for radar scanning of space - Google Patents

Abstract

FIELD: radar and radio navigation.

SUBSTANCE: invention relates to radar and can be used in radar stations (RS). Technical result is achieved by fact that radar scanning space by means of phased antenna array, electronic scanning on elevation angle and mechanical in azimuthal plane allow uniform distribution of maximum antenna gain by mechanical scanning beam in elevation plane.

EFFECT: technical result is maintaining maximum gain K_U radar antenna in wide range of scanning in elevation plane.

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Description

The claimed technical solution relates to the field of radar and can be used in radar stations (radar).

The most important requirements for a radar are a sufficient rate of output of information obtained during the review of the space, and a flexible way to control the scanning of the antenna beam. In modern radars, these requirements are met using a phased array antenna (PAR).

There is a method of reviewing the space, adopted as a prototype and implemented in 9C15 radar with phased array (History of Russian radar under the editorship of AS Yakunin. - M .: Publishing House "Capital Encyclopedia", 2011, p. 298), consisting in electronic scanning in elevation and mechanical scanning in the azimuthal planes, the AFL plane has a constant angle of inclination relative to the axis of rotation.

The angle φ of the tilt of the PAR (Fig. 1a) provides the maximum value of the gain (K _y ) of the antenna only in the preferred direction of the field of view. The preferred direction is considered the direction in which it is necessary to ensure the maximum detection range. The values of K _{for the} antenna in other elevation directions during electron scanning decreases according to the cosine law, which leads to a decrease in the detection range (D) (Fig. 1b). This is the disadvantage of the known method.

Thus, the known closest method of radar survey does not provide a maximum value of K _y in a wide range of electronic scanning in the elevation plane.

The task (technical result) is to maintain the maximum value of K _{at the} radar antenna in a wide scanning range in the elevation plane.

The problem is solved on the basis of a mechanical change in the inclination of the headlamp plane during the space survey.

The problem (technical result) is solved by the fact that in the method of radar viewing of space using a phased antenna array, which consists in electronic scanning along the elevation angle and mechanical in the azimuthal plane, according to the invention, the maximum distribution of the antenna gain is distributed evenly by mechanical scanning of the beam in elevation the plane.

The essence of the method is as follows.

During the circular review of the space, the antenna beam is mechanically scanned in azimuth due to the rotation of the antenna around the vertical axis, the PAR beam is electronically scanned by the elevation angle in the area of preferred angles, in addition to inspect areas of space outside the preferred elevation angles while maintaining the maximum K _{at the} antenna ( Fig. 2a) carry out a mechanical scan of the antenna beam in elevation by changing the angle of inclination of the PAR lamp relative to its axis of rotation, which can either by software using the appropriate commands from the control electronic computer of the radar, or periodically (cyclically) according to a predetermined algorithm (Fig. 2b). At the same time, a high viewing speed is maintained in the plane of elevation angles due to electronic scanning with a cosine change in K _y and periodic viewing of the entire zone by elevation with a maximum value of K _y (Fig. 2a) in all azimuthal directions. Thus, an overview of the entire area of space is provided with a maximum value of K _{at the} antenna at all elevation angles, and not only in the preferred one.

The invention is illustrated by drawings:

FIG. 1 is a diagram illustrating the operation of the prototype;

FIG. 2 - diagrams explaining the operation of the proposed method.

In FIG. 1a shows the position of the phased array of the prototype with the preferred direction of the maximum K value of _the antenna.

In FIG. 1b shows the cosine dependence of K _{at the} antenna and Cos ^{2 the} dependence of D on elevation angle ε.

Figure 2a shows the distribution of K _{at the} antenna and D in the process of changing the tilt of the PAR in ± φ in the elevation plane.

In FIG. Figure 2b shows the change in the direction of the rays with the maximum K _y in the process of changing the inclination of the PAR lamp along the elevation angle for two values of the azimuthal angle β — 0 ° and minus 180 °, respectively.

The claimed method works as follows.

During Omnidirection space carried mechanical scanning of the antenna beam in azimuth by rotating the antenna about a vertical axis, is carried out electronically scanned phased arrays beam in elevation in the preferred angles, further to expand portions while maintaining high K _in antenna (FIG. 2a) is carried out mechanically scanning the antenna beam along the elevation angle by changing the angle of inclination of the headlamp plane relative to its axis of rotation, which can be done either programmatically according to the corresponding m commands from the control electronic computer of the radar, or periodically (cyclically) according to a predetermined algorithm (Fig. 2b). At the same time, a high viewing speed is maintained in the plane of elevation angles due to electronic scanning with a cosine change in K _y and periodic viewing of the entire zone by elevation with a maximum value of K _y (Fig. 2a) in all azimuthal directions. This provides an overview of the entire area of space with a maximum value of K _{at the} antenna at all elevation angles, and not only in the preferred one.

Thus, the task is solved and the technical result is achieved.

Claims (1)

The method of radar viewing of space using a phased antenna array, which consists in electronic scanning along the elevation angle and mechanical in the azimuthal plane, characterized in that they ensure uniform distribution of the maximum value of the antenna gain by mechanical scanning of the beam in the elevation plane.

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