公开(公告)号：US20220077555A1

公开(公告)日：2022-03-10

申请号：US17514215

申请日：2021-10-29

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kosuke OOI ,  Shingo ITO ,  Hiromasa KOYAMA ,  Genro KATO ,  Kotaro MISHIMA

IPC: H01P3/08 ,  H01P3/00 ,  H05K1/02 ,  H05K3/28

Abstract: A transmission line substrate includes a line portion, a base including a first main surface and a second main surface opposite to the first main surface, first and second ground conductors, and a signal line. The first ground conductor is on the first main surface side. The second ground conductor is on the second main surface side. The first ground conductor includes first conductor-non-formed portions overlapping the signal line when viewed in the Z axis direction. The second ground conductor includes second conductor-non-formed portions overlapping the signal line when viewed in the Z axis direction. A total area of the second conductor-non-formed portions is less than a total area of the first conductor-non-formed portions.