High-frequency signal line

摘要

A signal line includes a first line portion at a first layer level and a second line portion at a second layer level, which are connected by a first interlayer connection. A first ground portion at the first layer level includes end portions closer to the first line portion than an intermediate portion, and a second ground portion at the second layer level includes end portions closer to the second line portion than an intermediate portion. A second interlayer connection connects one of the end portions of the first ground portion and one of the end portions of the second ground portion. A distance between the first and second interlayer connections is less than a distance between the first line portion and the intermediate portion of the first ground portion and is less than a distance between the second line portion and the intermediate portion of the second ground portion.

主权项

1. A high-frequency signal line comprising:
a body including a first layer level and a second layer level; a signal line including a plurality of first line portions provided at the first layer level, a plurality of second line portions provided at the second layer level, and a plurality of first interlayer connections connecting the plurality of first line portions and the plurality of second line portions to each other; a first ground conductor including a plurality of first ground portions provided at the first layer level and extending along the plurality of first line portions, each of the plurality of first ground portions including end portions and an intermediate portion between the end portions, the end portions of each of the plurality of first ground portions being closer to one of the plurality of first line portions than the intermediate portion of the respective first ground portion; a second ground conductor including a plurality of second ground portions provided at the second layer level and extending along the plurality of second line portions, each of the plurality of second ground portions including end portions and an intermediate portion between the end portions, the end portions of each of the plurality of second ground portions being closer to one of the plurality of second line portions than the intermediate portion of the respective second ground portion; and a plurality of second interlayer connections connecting the end portions of the plurality of first ground portions and the end portions of the plurality of second ground portions to each other; wherein a distance between each of the plurality of first interlayer connections and one of the plurality of second interlayer connections adjacent thereto is less than a distance between each of the plurality of first line portions and the intermediate portion of one of the plurality of first ground portions adjacent thereto and is less than a distance between each of the plurality of second line portions and the intermediate portion of one of the plurality of second ground portions adjacent thereto such that a characteristic impedance of the plurality of first interlayer connections and the plurality of second interlayer connections is smaller than a characteristic impedance of the plurality of first line portions and the plurality of second line portions; intervals between the plurality of first interlayer connections are shorter than a half wavelength of a signal transmitted on the signal line; and an outer edge of the end portions of each of the plurality of first ground portions faces one of the plurality of first line portions, the outer edge extending in a direction substantially parallel to an extending direction of the plurality of first line portions.