Transmission line, flat cable, and electronic device

A transmission line comprising:

• a stacked insulator in which a plurality of insulator layers are stacked;
• and
• a conductor pattern arranged along at least one of the plurality of insulator layers in the stacked insulator;
• wherein
• the conductor pattern includes:
• a first transmission line portion including:
• a first ground conductor pattern;
• a second ground conductor pattern;
• and
• a first signal conductor pattern, and
• a second transmission line portion including:
• a third ground conductor pattern;
• a fourth ground conductor pattern;
• and
• a second signal conductor pattern;
• the first signal conductor pattern extends along the second signal conductor pattern;
• each of the first ground conductor pattern, the second ground conductor pattern, the third ground conductor pattern, and the fourth ground conductor pattern includes a width that is larger than a width of each of the first signal conductor pattern and the second signal conductor pattern;
• the first ground conductor pattern and the second ground conductor pattern are respectively located on one side and another side of the first signal conductor pattern in a stacking direction of the plurality of insulator layers;
• the first signal conductor pattern, in a plan view, overlaps the first ground conductor pattern and the second ground conductor pattern and does not overlap at least one of the third ground conductor pattern and the fourth ground conductor pattern;
• the third ground conductor pattern and the fourth ground conductor pattern are respectively located on one side and another side of the second signal conductor pattern in the stacking direction of the plurality of insulator layers;
• the second signal conductor pattern, in a plan view, overlaps the third ground conductor pattern and the fourth ground conductor pattern and does not overlap at least one of the first ground conductor pattern and the second ground conductor pattern;
• at least the first ground conductor pattern and the third ground conductor pattern are provided on different insulator layers among the plurality of insulator layers and at least partially overlap each other in a plan view;
• the second ground conductor pattern and the fourth ground conductor pattern are provided on a same insulator layer among the plurality of insulator layers and are conductive with each other;
• and
• a distance between the third ground conductor pattern and the fourth ground conductor pattern in the stacking direction of the plurality of insulator layers is larger than a distance between the first ground conductor pattern and the second ground conductor pattern in the stacking direction of the plurality of insulator layers.