Determining the reflector surface of a radar antenna with point source feed

In the construction of a radar antenna the basic problem is to give the antenna reflector such a design that the scattering pattern will conform to the required power distribution. An approximative method is given for the determining of the central section of a reflector with point source feed and enveloping the osculating paraboloids, as well as a formula for the computation of the beam reflected by this surface. The central section obtained may be improved successively until adequate accuracy is attained. The method of computation is illustrated by an example.