| 摘要 |
[Problem] To provide an antenna device enabling a user to freely select a service using electromagnetic field communication technologies. [Solution] Provided is an antenna device that is equipped with: a first antenna; and a module unit that is provided with a second antenna, which has an opening area that is smaller than that of the first antenna, and which can be electromagnetically coupled to the first antenna, and a module that operates with a current generated by the second antenna by means of the electromagnetic coupling to the first antenna. The module unit can be attached to and removed from the first antenna. |
