Digital phase shift circuit and digital phase shifter

A digital phase shift circuit comprising:

• a signal line;
• a first line including a first parallel line extending parallel to the signal line;
• a second line including a second parallel line and a loop line, the second parallel line extending parallel to the signal line, and the loop line extending from one end portion of the second parallel line to a vicinity of another end portion of the second parallel line in plan view and being convex in a direction away from the signal line in a crossing direction crossing a longitudinal direction of the signal line;
• a first ground conductor electrically connected to one end portion of the first parallel line and the one end portion of the second parallel line;
• a second ground conductor connected to one end portion of the second line;
• a first electronic switch provided between another end portion of the first parallel line and the second ground conductor;
• and
• a second electronic switch provided between the other end portion of the second parallel line and the second ground conductor,
• wherein the signal line is located between the first parallel line and the second parallel line, and
• the loop line includes a first loop line section and a second loop line section, the first loop line section being formed in a first layer in which the signal line, the first parallel line, and the second parallel line are formed, and the second loop line section being electrically connected to the first loop line section through a via and being formed in a second layer different from the first layer.