Antenna, antenna apparatus, and communication apparatus

An antenna comprising:

• a magnetic core;
• a coil winding section in which a conducting wire is wound around a surface of the magnetic core;
• and
• an adjustment section arranged between an edge of the surface of the magnetic core, on which the conducting wire is not wound, and the coil winding section, wherein,
• the adjustment section includes a plurality of adjustable conducting wires;
• the plurality of adjustable conducting wires, which include at least a first adjustable conducting wire and a second adjustable conducting wire, are connected with each other at both ends of the adjustable conducting wires, one of the ends of the adjustable conducting wires being connected to the conducting wire of the coil winding section;
• and
• a first distance between the edge of the surface of the magnetic core and the first adjustable conducting wire is longer than a second distance between the edge of the surface of the magnetic core and the second adjustable conducting wire in a direction of a winding axis of the coil winding section.