Antenna apparatus and module apparatus

An antenna apparatus, comprising:

• a first antenna configured to:
• cause a first inductive current to flow based on electromagnetic induction with an external reader/writer, and
• generate a magnetic field based on the flow of the first inductive current;
• and
• a module unit that includes:
• a second antenna electromagnetically coupled with the first antenna,
• wherein an opening area of the second antenna is smaller than an opening area of the first antenna;
• and
• a module which is operated based on a second inductive current generated by the second antenna through the electromagnetic coupling between the first antenna and the second antenna,
• wherein the opening area of the second antenna is configured to allow the magnetic field generated by the first antenna to pass.

A module apparatus, comprising:

• a first antenna which has a first opening area smaller than a second opening area of a second antenna, wherein
• the second antenna is configured to:
• cause a first inductive current to flow based on electromagnetic induction with an external reader/writer, and
• generate a magnetic field based on the flow of the first inductive current, and
• the first antenna is electromagnetically coupled with the second antenna,
• the module apparatus is configured to operate based on a second inductive current generated by the first antenna through the electromagnetic coupling with the second antenna, and
• the module apparatus is attachable to and removable from the second antenna.