一种应用于WLAN/WIMAX的三频微带天线

文章设计了一个应用于WLAN(Wireless Local Area Networks)和WIMAX(Worldwide interoperability for Microwave Access)领域的具有三频带特性的微带天线.天线利用多分支形式来实现多频带特性,其结构包括印刷在介质板正面的一半圆形贴片、矩形环及一个领结形单元,在介质板背面的接地板采用非均匀结构,并在接地板上沿增加了矩形贴片用于改善阻抗匹配.通过仿真设计表明该天线在三个设计频段内达到理想的带宽并具有较好的全向辐射特性,分别在2.4GHz的频段带宽达到9%(2.39GHz-2.6GHz),在3.5GHz的频段达到10%(3.29GHz-3.64GHz),在5.8GHz频段达到8%(5.75GHz-6.03GHz),且天线各频段性能可独立控制.天线具有较小的结构尺寸为31mm×18mm×1.6mm.最后,对天线进行了加工并测试,测试结果与仿真结果吻合良好.

A triple band microstrip antenna for WLAN/Wimax

In this paper, A new printed tri band microstrip antenna has been designed.The antenna is proposed to be used for WLAN and WiMAX. It is achieved the multiband characteristic by use the multiple branching structure. the triple band antenna consist of a semi circle patch and a rectangular loop and bowtie shapes is printed on the front side of the substrate. Ground plane uses a nonlinear transformation structure and uses a rectangular patch for improve the impedance match is printed on the back side of substrate. Simulation indicated that the antenna achieved the appropriate bandwidth and have good radiation characteristics. In the 2.4 GHz frequency band relative bandwidth reach 9%(2.4 GHz 2.6 GHz), In the 3.5 GHz frequency band relative bandwidth is 9%(3.3 GHz 3.6 GHz) and 8%(5 GHz 5.4 GHz) the 5.8 GHz frequency band, and the performance of each band can be controlled independently. The structure of antenna with smaller size is 31 mm×18 mm×1.6 mm. In addition, The proposed antenna was fabricated and measured. The measured results are in good agreement with simulated ones.