摘要
提出一种基于时域有限差分法分析的多频带平面单极天线,以回波损耗-10 dB为标准,实际测得的天线工作频带覆盖了GSM900/DCS1800/PCS1900频段,同时还覆盖了TD-SCDMA相应工作频段。天线的主辐射单元是一个开槽的矩形辐射片,通过添加一个接地的耦合辐射分枝,有效扩展了天线的工作带宽。在设计过程中,比较了耦合辐射分枝的影响,以及主辐射单元中结构尺寸的变化对天线频率特性的影响,通过有目的的改进和优化,逐步提出性能良好,满足具体指标要求的多频带单极天线,通过对试验天线的测量得知,回波损耗和方向图的测量结果与仿真结果保持一致。
A multi-band planar monopole antenna based on finite difference domain（FDTD） for TD-SCDMA/GSM dual mode handset is introduced.The antenna is calculated by FDTD to verify the design theory.The operation frequency of trial prototype with return wave loss lower than-10 dB,can meet the requirements of GSM900/DCS1800/PCS1900 and TD-SCDMA.The antenna includes one rectangular slotted patch and grounded sub-branch that expands antenna operation bandwidth.During antenna design,the effect of sub-branch and main patch structure on antenna performance are analysed.Through improvement and optimization,a good performance multi-band monopole antema which meets the requirement of specific targets is proposed.Comparing the return wave loss with radiation pattern,the measured results keep with the simulation data.
出处
《现代电子技术》
2010年第7期107-110,共4页
Modern Electronics Technique
基金
国家自然科学基金资助项目(69972027
60202015)
