US 12,244,046 B2
Plane filter
Yasuaki Asahi, Kawasaki Kanagawa (JP)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP); and Toshiba Infrastructure Systems & Solutions Corporation, Kawasaki (JP)
Appl. No. 17/906,589
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATION, Kawasaki (JP)
PCT Filed Mar. 16, 2021, PCT No. PCT/JP2021/010521
§ 371(c)(1), (2) Date Sep. 16, 2022,
PCT Pub. No. WO2021/187457, PCT Pub. Date Sep. 23, 2021.
Claims priority of application No. 2020-046515 (JP), filed on Mar. 17, 2020.
Prior Publication US 2023/0049841 A1, Feb. 16, 2023
Int. Cl. H01P 1/203 (2006.01); H01P 7/08 (2006.01)
CPC H01P 1/203 (2013.01) [H01P 7/08 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A plane filter, comprising:
a dielectric substrate;
a filter part provided on the dielectric substrate; and
an input/output line connected to the filter part on the dielectric substrate,
the dielectric substrate including a front surface and a back surface, the back surface being at a side opposite to the front surface, the filter part and the input/output line being provided on the front surface,
the dielectric substrate further including a first region and a second region, the filter part being provided in the first region, the input/output line being provided in the second region, the second region extending along an outer edge of the dielectric substrate and surrounding the first region,
the first region having a first thickness in a first direction, the first direction being directed from the back surface toward the front surface,
the second region having a second thickness in the first direction, the second thickness being greater than the first thickness, the back surface having a step corresponding to a difference between the first thickness and the second thickness,
a connecting line provided on the first region and linking the input/output line and the filter part,
the input/output line and the filter part being arranged in a second direction along the front surface of the dielectric substrate, the input/output line having a width in a third direction along the front surface of the dielectric substrate, the third direction crossing the second direction,
the connecting line having a width in the third direction, the width of the connecting line in the third direction being less than the width of the input/output line in the third direction.