REFLECTOR ANTENNA FEED WITH NEAR-FIELD COUNTER-REFLECTOR ATTACHED TO DIELECTRIC INSERT Russian patent published in 2024 - IPC H01Q19/00 

FIELD: antenna equipment.

SUBSTANCE: invention relates to antenna engineering and is intended for use in mirror antennae. Reflector antenna feed with a near-field counter-reflector fixed on a dielectric insert includes a waveguide tube, one end of which is fixed in the base of the parabolic reflector, and opposite the second end of which there is a near-field counter-reflector, wherein in the gap between the end of the waveguide tube and the near-field counter-reflector there is a dielectric insert. At that, the dielectric insert located inside the waveguide tube has conical and cylindrical parts, wherein diameter of inner cylindrical part is equal to inner diameter of waveguide tube, and the outer diameter of the dielectric insert part located in the gap between the end of the waveguide tube and the near-field counter-reflector is equal to the outer diameter of the waveguide tube, wherein circular groove filled with sealing material is formed at waveguide tube end.

EFFECT: increased tightness of the waveguide tube on the side of the counter-reflector.

1 cl, 5 dwg