Patent ID: 9287631
Filing Date: 2016-03-15
CPC Classification: H01Q

Claim Text:
1. A double-reflector antenna comprising: a main reflector and a sub-reflector, each of which being made with nonaxisymmetric curvilinear surfaces and having two symmetry planes at which intersection a longitudinal axis Z is located; and at least a feed arranged between the main reflector and the sub-reflector with the capacity of illuminating, first, the sub-reflector and then, through it, the main reflector to allow for a plane wave-front, wherein the common focuses of the nonaxisymmetric curvilinear surfaces of the main reflector and the sub-reflector in all sections pass through the longitudinal axis Z of the antenna, and the sub-reflector faces the main reflector in a convex shape along the longitudinal axis Z, and the generatrix of the nonaxisymmetric curvilinear surfaces of the sub-reflector is defined in spherical coordinates r(θ,φ) as: where P