FIELD: antenna engineering. SUBSTANCE: matching device is made in the form of cylinder turning into cone. Reflector is provided with window accommodating matching device for its displacement along focal axis. Paraboloid focal axis is aligned with window axis. Cone height is calculated from formula given in description of invention. Matching device functions to reduce impact of reflected wave on feed with antenna operating on reception and transmission. EFFECT: improved efficiency of antenna in broad frequency band. 2 dwg
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