Excitation system for an antenna with a parabolic reflector and a dielectric radiator

An excitation system for an antenna comprising:

• (a) a reflector defining a sector antenna including a rectangular strip formed into a parabolic curve along its long axis and thereby defining two parabolic lengthwise edges and two ends;
• (b) an electromagnetic waveguide used to guide electromagnetic waves and placed in a center of the reflector, the electromagnetic waveguide having a central axis;
• and
• (c) a dielectric radiator with a metallized end face designed as a subreflector placed at an end of the waveguide, the end face having two pairs of partial faces, the partial faces of each pair being substantially equally sized and being arranged with respect to the central axis of the electromagnetic waveguide so that each pair of partial faces is approximately at right angles to the other pair of partial faces, and the partial faces of one pair extending in a direction of the long axis of the reflector are larger in comparison to the partial faces of the other pair, which extend crosswise thereto,
• further including a depression centrally located in the end face of the radiator and symmetrical with the central axis of the electromagnetic waveguide.