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设计了一种共面波导馈电的超宽带天线(UWB),该天线的辐射体和地板分别由具有渐变结构的类圆辐射贴片和梯形组成,具有良好的宽带阻抗匹配特性。通过在贴片的不同位置上嵌入3种不同形状的缝隙,实现了天线的3陷波特性。并利用HFSS 12软件对所设计的天线进行仿真测试,仿真计算和实测结果表明,该天线在WiMax(3.3～3.7G)、Wlan(5.15～5.825GHz)以及ITU(8.025～8.4GHz)3个频段内具有良好的陷波特性,并且该天线在其它通带频段具有良好的辐射特性和稳定的增益。天线的尺寸仅有25mm×29mm×1mm,利于与微波器件的集成。
An UWB antenna (UWB) with coplanar waveguide feedthrough is designed. The radiator and the floor of the antenna are respectively composed of a class of radial radiation patch and trapezoid with a gradual structure, and have good broadband impedance matching characteristics. By embedding three different shaped slots in different positions of the patch, the 3 notch characteristics of the antenna are realized. The designed antenna was tested by HFSS 12 software. The simulation results show that the proposed antenna has good performance in three frequency bands of WiMax (3.3 ~ 3.7G), Wlan (5.15 ~ 5.825GHz) and ITU Has excellent notch characteristics, and the antenna has good radiation characteristics and stable gain in the other pass band. The size of the antenna is only 25mm × 29mm × 1mm, which is conducive to the integration of microwave devices.