MULTI-BAND ANTENNA

摘要

A multi-band antenna including a ground plane, a radiation element, a first extension element and a second extension element is provided. The radiation element includes a first portion and a second portion electrically connected with each other. The first portion has a feeding point. The first and the second extension elements are extended from the ground plane. The first extension element and the first portion are spaced by a first coupling distance. The second extension element and the second portion are spaced by a second coupling distance. The multi-band antenna is operated in a first band through the radiation element. A feeding signal from the radiation element excites the first and the second extension elements through the first and the second coupling distances so that the multi-band antenna is operated further in a second band and a third band.

主权项

1. A multi-band antenna, comprising:
a ground plane; a radiation element comprising a first portion and a second portion electrically connected with each other, wherein the first portion is adjacent to an edge of the ground plane and has a feeding point; a first extension element extended from the edge of the ground plane and spaced from the first portion by a first coupling distance; and a second extension element extended from the edge of the ground plane and spaced from the second portion by a second coupling distance, wherein the multi-band antenna is operated in a first band through the radiation element, and a feeding signal from the radiation element excites the first and the second extension elements through the first and the second coupling distances so that the multi-band antenna is operated further in a second band and a third band.