US 12,237,555 B2
Waveguide, method of manufacturing waveguide and antenna
Seiji Nishi, Tokyo (JP); Takuro Sato, Tokyo (JP); Kazuhiko Tamesue, Tokyo (JP); and Tetsuya Kawanishi, Tokyo (JP)
Assigned to Waseda University, Tokyo (JP)
Filed by Waseda University, Tokyo (JP)
Filed on Feb. 15, 2023, as Appl. No. 18/169,211.
Claims priority of application No. 2022-208578 (JP), filed on Dec. 26, 2022.
Prior Publication US 2024/0213643 A1, Jun. 27, 2024
Int. Cl. H01P 3/02 (2006.01); H01P 1/02 (2006.01)
CPC H01P 3/02 (2013.01) [H01P 1/02 (2013.01)] 7 Claims
OG exemplary drawing
 
7. An antenna comprising:
an antenna element having an antenna port; and
a waveguide connected to the antenna port, wherein
the waveguide is a waveguide having a first conductor plate and a second conductor plate in contact with the first conductor plate,
the first conductor plate includes:
a groove portion that has a rectangular cross section and is formed parallel to a first main surface, which is a flat surface of the first conductor plate on the second conductor plate side, such that the longitudinal direction of the groove portion is a first direction; and
a first vertical tube portion formed in a direction away from the second conductor plate in a second direction, which is orthogonal to the first direction and the first main surface, starting from a branch position in the groove portion; and
the second conductor plate includes:
a second vertical tube portion formed in the second direction between the antenna port and the groove portion;
a reflective portion which is inserted into the groove portion in a manner to project from a second main surface, which is a flat surface of the second conductor plate in contact with the first main surface, and has a reflective surface which reflects a radio wave, propagated along the groove portion, toward the first vertical tube portion.