Hybrid mode feed horn having funnel-shaped horn flange with grooved conical inner surface

摘要

PCT No. PCT/EP86/00661 Sec. 371 Date Jul. 20, 1987 Sec. 102(e) Date Jul. 20, 1987 PCT Filed Nov. 17, 1986 PCT Pub. No. WO87/03143 PCT Pub. Date May 21, 1987.A hybrid-mode feed horn for feeding a reflector from the primary focus has a flange provided with grooves in an inner funnel-shaped surface thereof. The horn flange is formed to enable illumination of deep reflectors with a high aperture efficiency, low spill-over and high sidelobe suppression. The half opening angle theta o of the horn flange (7) is specified in the region 70 DEG < theta o<80 DEG . An offset of the feeding waveguide (3) in relation to the horn throat plane (21) is adjustable.