Antenna device

An antenna device comprising:

• an antenna main body disposed on one face side of a plate material having a mount hole provided therein;
• and
• a fixing member disposed on the other face side of the plate material, the fixing member fixing the antenna main body to the plate material,
• wherein the antenna main body comprises:
• an antenna element;
• a first connector electrically connected to the antenna element;
• a first screw section provided in a tightening direction in which an axial center line thereof passes through the mount hole;
• and
• an engagement section inserted into the mount hole from the one face side, thereby making engagement with the other face side, and
• the fixing member comprises:
• a feeder line provided to make connection with the antenna element;
• a second connector connected to the feeder line and provided to make mechanical engagement with, and electrical connection to, the first connector;
• and
• a second screw section helically fitted to the first screw section, thereby tightening the antenna main body, the fixing member, and the plate material with one another.