Surface-mount type antenna and antenna apparatus employing the same, and wireless communication apparatus

A surface-mount type antenna comprising:

• a base body, formed of a dielectric or magnetic material in the shape of a rectangular parallelepiped, having a first surface to be placed on a target substrate, and second, third, fourth, and fifth surfaces that are continuous with the first surface, and a sixth surface located in parallel with the first surface;
• a ground electrode formed on, of the second to sixth surfaces of the base body, at least one of the second to fifth surfaces;
• two pieces of radiating electrodes that are continuous with the ground electrode, each of which is so formed as to extend over two or more adjacent surfaces of the second to sixth surfaces;
• and
• two pieces of feeding electrodes formed on at least one of the second to fifth surfaces in such a way as to be spaced apart circumferentially of the continuum of the second to fifth surfaces to provide the ground electrode in between, the feeding electrodes being capacitance-coupled to the two radiating electrodes, respectively, for effecting feeding thereto.