Antenna device

An antenna device comprising:

• a plurality of waveguide sections each forming a waveguide path that is a propagation path for radio waves;
• a partition wall section disposed between the plurality of waveguide sections to partition the plurality of waveguide sections;
• a plurality of radiation aperture sections connected to the plurality of waveguide sections, respectively, to radiate the radio waves;
• and
• a distribution section including a feeding aperture through which radio waves are introduced and forming a distribution waveguide that is a propagation path to distribute and propagate the radio waves to each of the plurality of waveguide sections, wherein
• each of the plurality of waveguide sections extends in a first direction and has a connection on one side in the first direction, the connection being connected to an end of the distribution section on the other side in the first direction,
• the waveguide sections are arranged in a second direction orthogonal to the first direction, and positions of the connections of the waveguide sections overlap with each other in the first direction,
• positions of two of the radiation aperture sections are shifted from each other in the first direction, the two of the radiation aperture sections being respectively connected to two of the waveguide sections adjacent to each other via the partition wall section,
• the feeding aperture is connected to the distribution section in the second direction, and
• the distribution section is formed by being folded back from the one side to the other side in the first direction to propagate the radio waves to the connections of the two of the waveguide sections and to make phases of the radio waves opposite to each other.