Patent ID: 6911944

Claim:
An antenna apparatus comprising: a feed point; a first linear antenna element which has one end connected to the feed point; a second linear antenna element which has one end connected to the other end of the first linear antenna element; a third linear antenna element which has one end connected to the other end of the first linear antenna element; a fourth linear antenna element which has one end connected to the other end of the second linear antenna element; and a connection element which connects the other end of the second linear antenna element and a ground terminal, wherein a sum of lengths of the first, second, and fourth linear antenna elements is ¼ a wavelength corresponding to a wavelength of a first signal having a first frequency, a sum of lengths of the second, third, and fourth linear antenna elements is ½ a wavelength corresponding to a wavelength of a second signal having a second frequency, a sum of lengths of the first and third linear antenna elements is ¼ a wavelength corresponding to a wavelength of a third signal having a third frequency, and the second frequency is higher than the first frequency and lower than the third frequency.