| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a dual-reflector antenna which significantly reduces losses caused by spillover.SOLUTION: The antenna comprises an assembly. The assembly comprises a concave primary reflector 1 and a waveguide 3 that serves moreover as support mechanism to a sub-reflector 2. The assembly exhibits a rotational symmetry around an axis 4 of rotation. The sub-reflector 2 is made of dielectric material and comprises an external surface and a convex internal surface having the axis 4 of rotation. The internal surface is covered with a reflective metal. The external surface has a convex profile described by a polynomial of the sixth degree.</p> |
