Patent ID: 7852272

Claim:
An antenna apparatus for a wireless unit for transmitting and receiving an electromagnetic wave in each of frequency bands, comprising: a ground plate; a first antenna element for transmitting and receiving an electromagnetic wave in a first frequency band; a first feeder, provided on said ground plate, for feeding said first antenna element; a second antenna element for transmitting and receiving an electromagnetic wave in a second frequency band; and a second feeder, provided separately from said first feeder on said ground plate, for feeding said second antenna element, wherein said first antenna element is designed to extend from said first feeder to the outside of said ground plate, said second antenna element is designed to extend from said second feeder, and the total of an electrical length of said first antenna element, an electrical length of said second antenna element, and an electrical length between said first and second feeders is larger than a half wavelength of said first frequency band and equal to or smaller than one wavelength of said first frequency band.