ISM和UNNI双频印制天线设计

为了满足小型化、多频带的要求，该文基于ISM2．4GHz频带内具有最好的带宽特性的Bh天线，采用L型槽加载技术设计了一款用于ISM和UNNI频段的双频天线．首先采用传输线理论方法，对Bh天线的主要参数进行了分析和研究；然后对L型槽加载进行了原理性的说明．为了验证天线的性能，采用AnsoftHFSS软件对天线进行仿真，仿真结果表明，天线辐射性能达到了预期要求，与同类天线相比，在效率、辐射增益方面有更好的性能，而且，更加紧凑的天线尺寸使得该型天线应用前景更广．

Design of dual-band printed antenna used for ISM and UNNI Bands

To meet the small and multi-band requirements,the authors proposed a new dual-band antenna used for ISM and UNNI bands based on the Bh antenna,which has the best bandwidth for single-band operation within the ISM band and the L slot loading was also adopted. The key parameters of the Bh antenna were firstly analyzed using the transfer line method. And then the L slot loading method was discussed briefly. To validate the antenna＇s performance,Ansoft HFSS was adopted to simulate the antenna. The simulation results show that the antenna has achieved the expected performane~ Comparing with the same kind of the antenna,it not only has noticeable performance in the radiation efficiency and antenna gain,but also has a compacted size,which makes it have a wider application prospect .