新型缝隙加载陷波三频微带天线

A Novel Triple-band Micro-strip Antenna Based on Notched Structure

设计了一种基于陷波结构的三频微带印刷天线,以平面单极子天线为基础,采用共面波导馈电,通过在辐射贴片和微带线上加载缝隙实现了天线的三频特性。用电磁仿真软件HFSS12对天线进行设计优化,根据仿真结果制作了天线样品,测试结果与仿真结果吻合较好。天线回波损耗大于10dB的工作频段为1.85～2.53GHZ,3.14～4.38GHz和4.87～5.93GHz,可以很好地覆盖Bluetooth(2.4～2.48GHz),WiMAX(3.4～3.6GHz)和WLAN(5.15～5.825GHz)3个频段。在工作频带内阻抗特性和方向图特性良好,可以满足无线通信的要求。

A triple-band printed micro-strip antenna fed by coplanar waveguide （CPW）is designed based on notched structure.The character of multi-band is achieved by adding slots to the radiation patch and micro-strip of planar monopole antenna.The antenna model is simulated and optimized by electromagnetism simulation software HFSS12 and a prototype is manufactured according to the result of simulation.The reult of measurement fits well with that of simulation.The antenna can work on the bands of 1.85~2.53 GHZ,3.14~4.38 GHz and 4.87~5.93 GHz （S11〈-10 dB）,which cover the bands of Bluetooth （2.4~2. 48 GHz）,WiMAX （3.4~3.6 GHz）and WLAN （5.15~5.825 GHz）.The antenna’s impendence and gain are good enough to meet the requirement of wireless communication in its working bands.