Electronic apparatus and antenna device

An electronic apparatus comprising:

• an antenna device;
• a circuit board including a circuit;
• and
• a housing containing the antenna device and the circuit board;
• wherein
• an inner surface of the housing and the circuit board are spaced from each other by a distance;
• the housing includes a first ground conductor;
• the antenna device includes:
• an antenna unit;
• a matching circuit unit connected to the antenna unit;
• a transmission line unit connected to the matching circuit unit;
• and
• a connecting portion included in the transmission line unit and connected to the circuit of the circuit board;
• the antenna unit, the matching circuit unit, the transmission line unit, and the connecting portion are disposed in a single substrate;
• the antenna device is at least partly disposed along the inner surface of the housing;
• at least one of the matching circuit unit and the transmission line unit includes a second ground conductor, and includes a ground connection portion at least in a portion of a surface of a region where the antenna device is disposed along the inner surface of the housing;
• and
• the ground connection portion electrically connects the second ground conductor to the first ground conductor.