METHOD FOR GENERATION OF EXPANDED BEAMS OF PHASED ANTENNA ARRAY Russian patent published in 2021 - IPC H01Q3/26 

FIELD: physics.

SUBSTANCE: invention relates to antenna engineering, particularly to methods of controlling the beamform of a phased antenna array. Technical result is achieved by the fact, that in the method for formation of expanded beams of phased antenna array, based on determination of amplitude-phase distribution in its opening, at which predetermined beam pattern is oriented in direction u₀, formation of expanded beam pattern by partial beams, selection of spatial positions of partial beams only in region of main beam of preset beam pattern, in contrast to prototype in phased antenna array with initial cophased distribution, radiators of which have coordinates x_i with corresponding consecutive numbering from 1 to M, partial beams are formed by pairs of adjacent emitters, numbered in the same sequence from 1 to (M-1), amplitudes of the first F₁ and the last F M-1 partial beams are formed respectively by the sum of the amplitude of the signal of the first radiator and the half-value of the amplitude of the second and the sum of the half-value of the amplitude of the signal of the penultimate emitter and amplitude of the latter, amplitudes of the remaining partial beams are formed by sums of half-values of amplitudes of signals of the respective neighbouring emitters, each partial beam successively in accordance with the number of the partial ray m is selected angular interval Δu_m in generalized coordinates u = sin (θ), where θ is the angle relative to the normal to the opening, determining the coordinates u_m of the middle of the angular interval allocated to each partial beam with the current number m, in which corresponding partial beams are directed, by adding to the initial phase of the signal passing through each radiator, such that the phase of the first radiator does not change, and the phases of all subsequent radiators change simultaneously by the corresponding value.

EFFECT: technical result of the invention is to increase energy efficiency when generating an extended beam pattern.

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