Antenna substrate

An antenna substrate, comprising:

• a substrate on which a semiconductor chip having a first terminal and a second terminal are mounted;
• a ground electrode that is arranged on the substrate and has a first opening area and a second opening area;
• a first antenna element that is arranged at a first distance away from the ground electrode, on the substrate within the first opening area;
• a second antenna element that is arranged at a second distance away from the ground electrode, on the substrate within the second opening area;
• a first transmission line that connects the first terminal and the first antenna element;
• and
• a second transmission line that connects the second terminal and the second antenna element, wherein
• the first distance is a shortest distance between the ground electrode and the first antenna element in a direction along a plane along which an electric field among an electromagnetic wave radiated from the first antenna element vibrates,
• the second distance is a shortest distance between the ground electrode and the second antenna element in a direction along a plane along which an electric field among an electromagnetic wave radiated from the second antenna element vibrates, and
• the first distance is different from the second distance.