Synthesis of a small parabolic grid receiving antenna

The purpose of a paraboloidal receiving antenna is to concentrate an incoming electromagnetic field in the region of the geometrical focus, so that the strength of the field there is increased by the reflector focusing action. It is shown how, starting with two reflector grids symmetrically located in an eight-element grid paraboloid, this increase of the field along the axis is achieved, as the number of grid elements is increased to fill the paraboloid.