Patent ID: 8766865

Claim:
An antenna device, comprising: a reflector antenna including a primary radiator arranged along a longitudinal axis; a reflector arranged along the longitudinal axis so that the longitudinal axis that passes through a center of the reflector and is orthogonal to the reflector at the center of the reflector; and a feed waveguide arranged along the longitudinal axis and between the reflector and the primary radiator, the feed waveguide for feeding radio waves to the primary radiator; a radome that covers the reflector antenna; and a sidelobe reduction member attached to the primary radiator or the feed waveguide and arranged along the longitudinal axis, the sidelobe reduction member reducing a sidelobe in a specific direction of the reflector antenna by at least one of scattering and absorbing of radio waves reflected by the radome which is a part of the radio waves radiated from the reflector antenna.