Arrangement for feeding a centrally focused reflector antenna
View Patent ↗An arrangement for feeding a centrally focused reflector antenna includes a waveguide ( 1 ), a dielectric field transformer ( 2 ) arranged on the waveguide ( 1 ) and a mounting platform ( 3 ) for a series of modules ( 8 ) which is embodied on one end of the waveguide ( 1 ). The waveguide ( 1 ) is provided with an arrangement for receiving the dielectric field transformer ( 2 ) which partially protrudes into the waveguide ( 1 ). Preferably, a dielectric support ( 9 ) may be provided in the vicinity of the dielectric field transformer ( 2 ). The middle of the support has a circular bore ( 12 ) whose diameter corresponds to the diameter of the dielectric field transformer ( 2 ). The centrally focused reflector antenna can be excited in the focal point thereof in a field-optimum broadband manner.
1. An arrangement for feeding a centrally focused reflector antenna comprising a waveguide ( 1 ) and a dielectric support ( 9 ), characterized in that a dielectric field transformer ( 2 ) is mounted on said waveguide ( 1 ) and said dielectric support ( 9 ) is mounted in front of said waveguide ( 1 ) in the vicinity of said dielectric field transformer ( 2 ) without being mechanically or electrically connected thereto, wherein said dielectric support ( 9 ) includes a circular bore ( 12 ) at the center thereof whose diameter corresponds to the diameter of said dielectric field transformer ( 2 ), said dielectric field transformer ( 2 ) partly protrudes into said circular bore ( 12 ), and a mounting platform ( 3 ) for downstream modules ( 8 ) is provided at the end of said waveguide ( 1 ).
2. The arrangement of claim 1 , further comprising a reflector, characterized in that the geometry of said dielectric field transformer ( 2 ) is matched to the reflector.
3. The arrangement of claim 1 , characterized in that all components of said arrangement other than said dielectric field transformer ( 2 ) and said dielectric support ( 9 ) are made of metal, and the interior of said waveguide ( 1 ) has a surface roughness of less than 0.5 μm.
4. The arrangement of claim 3 , wherein said components made of said metal are made in one piece.
5. The arrangement of claim 1 , further comprising a reflector, characterized in that said mounting platform ( 3 ) includes mounts ( 4 ) to which said reflector ( 6 ) is mounted by means of struts ( 7 ), and said downstream module ( 8 ) is mounted in a rotatable and fixable manner about the axis of symmetry of said reflector ( 6 ).
6. The arrangement of claim 1 , characterized in that said dielectric support is connected to said mounting platform ( 3 ) by means of bolted spacers ( 11 ) of metal or dielectric material, and is arranged plane-parallel to said mounting platform.
7. The arrangement of claim 1 , characterized in that parasitic radiator elements with circuit components ( 10 ) are arranged on said dielectric support ( 9 ) individually or in orthogonally aligned pairs having a planar or three-dimensional geometry in an edge region of a beam path around said bore ( 12 ).
8. The arrangement of claim 7 , wherein said radiator elements are passive radiator elements feedable by radiation coupling.