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设计了一种共面波导馈电超宽带天线。该天线在单层覆铜介质基板上通过酸蚀制得,介质基板尺寸为26.0mm×29.0mm×1.5mm,材料是相对介电常数为4.4的FR4,利用仿真软件HFSS对天线参数进行仿真和优化。结果表明,通过在共面波导地面上刻蚀对称结构的多边形槽,天线频带宽度达到2.8～10.5GHz(S11≤-10dB),相对带宽达116%,该天线具有良好的方向图和增益性能,满足超宽带天线性能要求。
A coplanar waveguide-fed UWB antenna was designed. The antenna is obtained by acid etching on a single-layer copper-clad dielectric substrate. The size of the dielectric substrate is 26.0 mm × 29.0 mm × 1.5 mm. The material is FR4 with a relative dielectric constant of 4.4. The antenna parameters are simulated by the HFSS optimization. The results show that the antenna bandwidth is 2.8 ~ 10.5GHz (S11≤-10dB) and the relative bandwidth is 116% by etching the polygonal groove with symmetrical structure on the coplanar waveguide. The antenna has good pattern and gain performance, UWB antenna to meet the performance requirements.