| 摘要 |
FIELD: antenna.SUBSTANCE: onboard multibeam double-reflector antenna with shifted focal axis consists of a main mirror-reflector with a profile, formed by rotating a monotonous part of a parabola about an, auxiliary small mirror-convergent mirror with a profile, formed by rotation around axis of symmetry of a reflector an ellipse section around axis of symmetry, first focus of which is located on said axis, and second coincides with focus of parabola, which forms reflector, and array of radiators. Array of radiators is set opposite convergent mirror in central part of reflector such that phase centres of radiators of array are located in plane perpendicular to axis of symmetry of reflector, wherein phase centre of middle radiator lies in first of foci of ellipse, forming convergent mirror.EFFECT: technical effect is expansion sector of generating partial beams of antenna directional pattern with simultaneous increase of resulting antenna efficiency and reducing level of cross-polarisation.1 cl, 1 dwg |
