Mitsubishi Electric Corporation

Takashi Tomura

Yoshio Inasawa

Michio Takikawa

Shinichi Yamamoto

An antenna device includes a beamforming circuit () that forms a radio wave in a first frequency band, including two polarized waves orthogonal to each other, and outputs the radio wave in the first frequency band, a beamforming circuit () that receives the radio wave in the first frequency band output from the beamforming circuit (), and outputs a the radio wave in the first frequency band, and forms a radio wave in a second frequency band, including two polarized waves orthogonal to each other, and outputs the radio wave in the second frequency band, and primary radiators () that emit a beam in the first frequency band in response to the radio wave in the first frequency band output from the beamforming circuit (), and emit a beam in the second frequency band in response to the radio wave in the second frequency band output from the beamforming circuit ().

Antenna device

A first region of a reflection mirror including a center point of the paraboloid of revolution is formed of a conductor. A second region, which is an outer peripheral side of the first region, of the reflection mirror is a region where a plurality of reflection elements, which are conductor patterns, is arranged on a dielectric body overlaid on a base plate conductor. An arrangement pitch of the plurality of reflection elements corresponds to a wavelength of a radio wave in the second frequency band.

Reflection mirror antenna device

A plurality of primary radiators () is classified by combinations of frequency and polarization of radiated radio waves, a plurality of primary radiators () belonging to the same class is arranged at positions corresponding to vertexes of one of triangles in a repeated triangle pattern TR, and the shape of a main reflector () and the shape and arrangement of the repeated triangle pattern TRare determined such that a direction of a line segment passing through positions corresponding to two vertexes in the triangle is different from a radiation direction of a sidelobe of a radio wave reflected by a main reflector () after having been radiated from a primary radiator () arranged at a position corresponding to the vertexes.

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Tokyo, Japan

Takashi Tomura