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The development of radiorelay communication systems in millimeter wave range at the frequencies 36 to 38 GHz has required a design of efficient antenna systems. Radiorelay station of this frequency range has rather small overall dimensions. That is why antenna for such station must be as small as possible and therefore it must have the aperture efficiency as high as possible. Such requirements can be best satisfied by a two-reflectors parabolic antenna having a small reflector with elliptical generatrix and a large reflector with parabolic generatrix and displaced axis [1]. A schematic sketch of such antenna is presented in Fig. 1.