US 12,107,310 B2
Mode converter, RF module, and mobile terminal
Yusuke Uemichi, Sakura (JP)
Assigned to FUJIKURA LTD., Tokyo (JP)
Appl. No. 17/612,135
Filed by FUJIKURA LTD., Tokyo (JP)
PCT Filed Jun. 5, 2020, PCT No. PCT/JP2020/022354
§ 371(c)(1), (2) Date Nov. 17, 2021,
PCT Pub. No. WO2020/250830, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. 2019-108153 (JP), filed on Jun. 10, 2019; and application No. 2020-009352 (JP), filed on Jan. 23, 2020.
Prior Publication US 2022/0231390 A1, Jul. 21, 2022
Int. Cl. H01P 5/107 (2006.01); H01P 1/161 (2006.01); H01P 1/30 (2006.01); H01P 5/08 (2006.01)
CPC H01P 1/161 (2013.01) [H01P 1/30 (2013.01); H01P 5/085 (2013.01); H01P 5/107 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A mode converter comprising:
a post-wall waveguide in which an opening is provided in a first wide wall;
a dielectric substrate having a first main surface and a second main surface on at least one of which a strip-shaped conductor is formed;
a joining member joining directly or indirectly the first wide wall and the substrate,
wherein at least a portion of the opening and at least a portion of the strip-shaped conductor overlap each other in a plan view of the post-wall waveguide,
the opening is shaped in a trapezoid, and
in a plan view of the post-wall waveguide, the opening is arranged such that a pair of bases forming the trapezoid are parallel to each of a pair of narrow walls constituting the post-wall waveguide, and a distance from a central axis of the strip-shaped conductor to a shorter base out of the pair of bases exceeds a distance from the central axis of the strip-shaped conductor to a longer base out of the pair of bases.