Antenna device

摘要

An antenna device including: a reflector antenna including a primary radiator, a feed waveguide for feeding radio waves to the primary radiator, and a reflector; and a radome that covers the reflector antenna, in which the antenna device further includes a sidelobe reduction member attached to a vicinity of the primary radiator or the feed waveguide, the sidelobe reduction member reducing a sidelobe in a specific direction of an antenna by at least one of scattering and absorbing of radio waves reflected by the radome out of the radio waves radiated from the reflector antenna. Therefore, it is possible to reduce a sidelobe deterioration caused by reflection waves from the radome.

主权项

1. 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; anda 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.