US 12,230,423 B2
Transmission line and electronic device
Nobuo Ikemoto, Nagaokakyo (JP); Noriaki Okuda, Nagaokakyo (JP); Kosuke Nishio, Nagaokakyo (JP); and Masanori Okamoto, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on May 17, 2023, as Appl. No. 18/198,475.
Application 18/198,475 is a continuation of application No. PCT/JP2021/042035, filed on Nov. 16, 2021.
Claims priority of application No. 2020-198385 (JP), filed on Nov. 30, 2020; and application No. 2021-033558 (JP), filed on Mar. 3, 2021.
Prior Publication US 2023/0290537 A1, Sep. 14, 2023
Int. Cl. H01B 7/02 (2006.01); H01B 3/30 (2006.01); H01B 7/04 (2006.01)
CPC H01B 7/0225 (2013.01) [H01B 3/30 (2013.01); H01B 7/04 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A transmission line comprising:
a multilayer body including a plurality of insulator layers laminated in an up-down direction;
a signal conductor layer in the multilayer body and extending in a front-back direction orthogonal to the up-down direction; and
a first ground conductor layer in the multilayer body and above the signal conductor layer to overlap with the signal conductor layer when viewed in the up-down direction; wherein
the multilayer body includes a plurality of first hollow portions and a plurality of second hollow portions;
the plurality of first hollow portions and the plurality of second hollow portions overlap with the first ground conductor layer when viewed in the up-down direction;
a direction orthogonal to the front-back direction is a first orthogonal direction, and a direction orthogonal to the front-back direction and the first orthogonal direction is a second orthogonal direction;
the second orthogonal direction includes a first direction and a second direction that is a direction opposite to the first direction;
when viewed in the first orthogonal direction, the plurality of first hollow portions is arranged in the front-back direction in the first direction of the signal conductor layer;
when viewed in the first orthogonal direction, the plurality of second hollow portions is arranged in the front-back direction in the second direction of the signal conductor layer;
regions each located between two of the first hollow portions adjacent to each other in the front-back direction are a plurality of first regions;
regions each located between two of the second hollow portions adjacent to each other in the front-back direction are a plurality of second regions;
each of the plurality of first hollow portions overlaps with a corresponding one of the plurality of second regions when viewed in the second orthogonal direction; and
each of the plurality of second hollow portions overlaps with a corresponding one of the plurality of first regions when viewed in the second orthogonal direction.