Signal transmission line

A signal transmission line comprising:

• a base including a plurality of insulating base material layers laminated in an up and down direction and a first section that is bent in the up and down direction;
• a signal conductor layer in the base;
• a first ground conductor layer in the base and above the signal conductor layer so as to be overlapped with the signal conductor layer as viewed in a downward direction;
• and
• one or more first spacers;
• wherein
• the signal transmission line further comprises:
• a signal region that includes the signal conductor layer and some of the plurality of insulating base material layers;
• and
• a first ground region that includes the first ground conductor layer and some of the plurality of insulating base material layers and is located above the signal region;
• the signal region is not fixed to the first ground region in the first section of the base;
• the one or more first spacers are fixed to the signal region and in contact with the first ground region without being fixed thereto, or are in contact with the signal region without being fixed thereto and fixed to the first ground region;
• and
• the one or more first spacers are in the first section.