Antenna device and multi-band type wireless communication apparatus using same

An antenna devices comprising:

• an approximately U-shaped conductor antenna, on one end-side of which a power feeding portion is provided and on an other end-side of which an end portion is provided as an open end terminal;
• a base body comprising an insulating material;
• and
• a board on which said base body and said conductor antenna are mounted,
• wherein one end of said conductor antenna and an other end of said conductor antenna are placed so as to come near to each other with said base body interposed between said one end of said conductor and said other end of said conductor antenna,
• wherein said base body is coupled to one of said one end of said conductor and said other end of said conductor antenna, and
• wherein said approximately U-shaped conductor antenna is formed so that said both ends of said conductor antenna are electro-static capacitively coupled to each other.

An antenna device, comprising:

• an approximately U-shaped conductor antenna, in an approximately central portion on one end-side of which a power feeding portion is provided and on an other end-side of which an end portion is provided as an open terminal;
• a base body comprising an insulating material;
• and
• a board on which said base body and said conductor antenna are mounted,
• wherein one end of said conductor antenna and an other end of said conductor antenna are placed so as to come near to each other with said base body interposed between said one end of said conductor and said other end of said conductor antenna,
• wherein said base body is coupled to one of said one end-side of said conductor and said other end-side of said conductor antenna, and
• wherein said approximately U-shaped conductor antenna is formed so that said both ends of said conductor antenna are electro-static capacitively coupled to each other.