Multi-band antenna

摘要

An antenna which operates in a plurality of frequency bands includes a feeding point, a first conductor which is connected to the feeding point, and at least two second conductors which are branched from the first conductor, have a linear shape, and include open ends as ends on a side opposite to the first conductor. The open ends of the two second conductors face in almost the same direction substantially parallel to a side closest to the feeding point out of the sides of an antenna region. The two second conductors include a part at which the distance between the two conductors at a portion parallel to the side is a first distance, and another part at which the distance is a second distance shorter than the first distance, and are electromagnetically coupled at, at least the other part.

主权项

1. A multiband antenna that operates in a plurality of frequency bands, comprising:
a first conductor that has a linear shape; and a second conductor that has a linear shape; wherein the first conductor and the second conductor both comprise a first part and a second part, wherein a distance between the first part of the first conductor and the first part of the second conductor is a first distance and a distance between the second part of the first conductor and the second part of the second conductor is a second distance shorter than the first distance, wherein the second part of the first conductor is substantially parallel to the second part of the second conductor, and a direction of the second part of the first conductor toward an open end of the first conductor is substantially the same as a direction of the second part of the second conductor toward an open end of the second conductor, wherein the first conductor and the second conductor are electromagnetically coupled to each other in at least the second part, and wherein at least the second part of the first conductor is arranged on a plane different from another plane whereon the second part of the second conductor is arranged, and each of operating frequencies of the first conductor and the second conductor is shifted, by the first conductor and the second conductor being electromagnetically coupled, to be lower than each of operation frequencies when the first conductor and the second conductor are not electromagnetically coupled.