High-frequency signal transmission line and electronic device

A high-frequency signal transmission line comprising:

• a body including a plurality of insulator layers laminated on each other;
• a linear signal line provided in or on the body;
• a first ground conductor facing the signal line across the insulator layer;
• and
• an adjustment conductor;
• wherein
• the body includes a connection portion in which the signal line and an external circuit are electrically connected in a first main surface;
• in the first ground conductor, a conductor-missing portion is provided in at least a portion of a region overlapping with the signal line, in a planar view from a lamination direction in the connection portion;
• and
• the adjustment conductor is provided in a second main surface of the body, and overlaps with at least a portion of the conductor-missing portion in the planar view from the lamination direction.

An electronic device comprising:

• a high-frequency signal transmission line;
• and
• a housing containing the high-frequency signal transmission line;
• wherein the high-frequency signal transmission line includes:
• a body including a plurality of insulator layers laminated on each other;
• a linear signal line provided in or on the body;
• a first ground conductor facing the signal line across the insulator layer;
• and
• an adjustment conductor;
• wherein
• the body includes a connection portion in which the signal line and an external circuit are electrically connected in a first main surface;
• in the first ground conductor, a conductor-missing portion is provided in at least a portion of a region overlapping with the signal line, in a planar view from a lamination direction in the connection portion;
• and
• the adjustment conductor is provided in a second main surface of the body, and overlaps with at least a portion of the conductor-missing portion in the planar view from the lamination direction.