Abstract
A compact and simple printed monopole antenna which can be used for WLAN/WiMAX and 5G applications is presented in this paper. Compared with many other similar works presented before, a simpler structure is used in this antenna which consists of a rectangular loop, a vertical strip and aT-shaped strip inside the loop, microstrip feed line and ground plane. The lower band which covers from 2.14GHz to 2.49GHz is mainly controlled by the size of rectangular loop. The middle band of 3.15GHz-4.06GHz is controlled by the dimension of T -shaped strip. The upper band of 5.12GHz-5.93GHz is decided by the vertical strip. What's more, steady omni-directional radiation patterns in H-plane and bidirectional radiation patterns in E-plane are obtained in these three operating frequency bands respectively.
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