一种用于WLAN/WiMAX的小型三频带印刷单极天线

A Miniaturized Triband Printed Monopole Antenna for WLAN/WiMAX Application

设计了一种满足WLAN和WiMAX工作所需的小型共面波导馈电的三频带印刷单极子天线单元。该单极子天线的设计采用了在倒锥形单极天线表面开缝和在底层加载枝节的结构,使其获得了小型化和三频带的性能。采用基于共面波导的馈电方式,使天线单元具备宽带匹配、结构简单、制作方便和易与其它无线通信设备集成等优点。仿真和实测结果表明,设计的天线单元在WLAN和WiAMX应用的频段上10dB阻抗带宽分别约为610MHz(2.10～2.71GHz,约25.4%),310MHz(3.48～3.79GHz,约8.9%)和360MHz(4.96～5.32GHz,约7%),增益也都在2dB以上,而且在相应工作频点上辐射方向图全向性较好。该天线能满足WLAN和WiMAX的应用所需,具有较高的工程应用价值。

In this paper, a miniaturized CPW-fed triband printed monopole antenna for WLAN/WIMAX application is presented. The miniaturized and triband performance of the proposed monopole are achieved by slotting at the upper of the tab-like monopole and loading branch at the bottom of its. feed by CPW, the monopole obtained some favorable characteristics, such as broadband matched, simple structure, easy to manufacture and integrate with other communication equipments. Simulation and experimental results show that the 10dB return loss impedance bandwidths for the WLAN and WiMAX band are 610MHz （a-bout25.4% ）which covers from 2. 10GHz to 2.71GHz , 310MHz （about8.9%） which covers from 3.48GHz to 3.79GHz and 360MHz （ about7% ） which covers from 4.96GHz to 5.32GHz respectively, gain of the antenna are all above 2dB and that radiation patterns of the proposed antenna are also suitable forWLAN and WiMAX applications.