| 摘要 |
FIELD: radio engineering. ^ SUBSTANCE: mirror antenna shaping a cosecant directivity pattern comprises a sector of a paraboloid of revolution, a feed horn and a flat subdish, the feed horn is displaced from a parabola focus in the focal plane in a direction transverse from the axis. The feed horn is displaced from a focus of the paraboloid of revolution in the focal plane in a direction transverse to the axis of the paraboloid of revolution by the value from 0.1f to 0.5f, where f is a focus distance from the paraboloid of revolution. At the same time the reflecting surface of the parabolic sector is arranged as composite of spherical panels made, for instance, by the hydroforming method, and the parabolic mirror frame is assembled, for instance, from flat aluminium trusses with joint sites processed following the profile of the paraboloid of revolution, where spherical panels are fixed. ^ EFFECT: considerable expansion of a working antenna sector by a tilt angle with simplified technology of mirror antenna production with a cosecant directivity pattern. ^ 2 cl, 3 dwg |
