METHOD OF FORMING THE EXPANDED DIAGRAMS OF THE A PHASE ANTENNA DIRECTION LATTICE

摘要

FIELD: radio engineering and communication.;SUBSTANCE: invention relates to microwave engineering and EHV ranges. Amplitude-phase distribution in the opening of the phased array antenna is determined, at which the given radiation pattern is oriented in the direction u₀, the spatial positions of the partial rays are chosen only in the region of the main ray of the given radiation pattern. Formation of the extended radiation pattern is produced by three partial rays, central partial ray is oriented in the given direction u₀, and two lateral partial rays are displaced in directions opposite to the central ray by an angle u₁. Angle u₁ value is chosen from the solution of the optimization problem by the criterion of a minimum , where ƒ(u-u₀), ƒ(u-u₀+u₁), ƒ(u-u₀-u₁) – respectively, the directional patterns of the central partial and two side partial rays; u₀= 0.5kLsinθ₀ – the direction of the maximum of the beam pattern and the central partial ray in generalized coordinates; u₁= 0.5kLsinθ₁ – displacement of lateral partial rays relative to the maximum of the beam pattern in generalized coordinates; a - amplitudes of deflected lateral partial rays; u = 0.5kLsinθ – generalized coordinate; L is the size of the phased array antenna opening in the plane of the expanded beam pattern being formed; k is the wave number. Amplitudes of the side partial rays are determined in accordance with expression a=(ƒ(Δ)-0.707)(0.707(ƒ(u₁)+ƒ(-u₁))-(ƒ(Δ+u₁)+ƒ(Δ-u₁)))^-1, where Δ – the half-width of the radiation pattern of the total ray at half-power level. Amplitude-phase distribution in the opening of the phased array antenna is calculated from the next formula A(x)=A₀(x)(1+a(exp(ikxsinθ₁)+exp(-ikxsinθ₁)))=A₀(x)(1+2acos(kxsinθ₁)), where A₀(x) is the amplitude-phase distribution in the opening, which provides the formation of a central partial ray in the direction u₀.;EFFECT: technical result consists in acceleration of operating speed.;1 cl, 7 dwg