共面波导馈电的带阻UWB天线设计

摘要

A design method of a band-notched CPW-fed planar circular monopole UWB antenna is presented. This　antenna can satisfy the spectrum requirement of UWB wireless communications which covers a spectrum range from　3.1 GHz to 10.6 GHz. The band-notched character( VSWR≥2)is achieved by adding a U slot on the circular patch　when spectrum is from 4. 75 GHz to 5.96 GHz and by adding a curve slot when spectrum is from 4.8 GHz to 6.2GHz. The interference of the WLAN (5 GHz ) is avoided. The radiation patterns are illustrated with the　electromagnetic simulation software CST, and the results indicate that the design is reasonable.%提出了共面波导(CPW)馈电平面圆形单极子带阻超宽带(UWB)天线的设计方法,采用该方法设计的天线满足超宽带无线通信所要求的3.1 GHz～10.6 GHz的频带范围,通过在圆形贴片上添加U形和弧形缝隙,可分别实现4.75 GHz～5.96GHz范围内和4.8 GHz～6.2 GHz范围内电压驻波比VSWR≥2的带阻特性,均避免了5 GHz无线局域网的干扰.采用电磁仿真软件CST进行了天线的方向图绘制,仿真结果表明该设计可行.