一种新型钻石形超宽带天线的设计与实现

摘要

设计一种新型钻石形超宽带天线，该天线印刷在介电常数为4.4的 FR4介质板上，尺寸为26 mm×24 mm×0.8 mm.设计过程中对天线辐射贴片进行两次优化，并利用阶梯化接地板的方法对天线进行优化.实验结果表明，该天线可在2.0~14.5 GHz内实现电压驻波比VSWR≤2的带阻特性，相对带宽为151%，且具有结构简单和小形化等优点，可应用于各种超宽带(UWB)系统中.%A novel ultra-wideband antenna with diamond-shaped patch was designed and fed by a coplanar waveguide.The size of the substrate is 26 mm×24 mm×0.8 mm and the substrate material uses FR4 with a relative permitivity of 4.4.The patch was optimized twice by ground plant’s first order optimization. The simulated and experimental results demonstrate that the bandwidth (VSWR≤2)starts from 2.0 GHz up to 14.5 GHz and relative bandwidth comes to 151%.This diamond-shaped UWB antenna has the advantages of simple structure and miniaturization that can be applied to various UWB systems.