新型超宽带紧耦合天线阵列设计

一种新型超宽带紧耦合天线阵列设计

内容简介：针对紧耦合天线阵列（Tightly Coupled Array，TCA）安装于飞机、导弹、舰船等平台时接地板严重影响其阻抗带宽的问题，将栅格形阻性频率选择表面与交指型偶极子天线单元相结合，设计了一种新型多层结构的超宽带TCA。采用CST对加载与未加载栅格形阻性频率选择表面时TCA的性能进行了比较分析。结果表明：未加载时，受接地板影响其最佳阻抗带宽（VSWR<2）为4.5∶1（2.1~9.5 GHz）；加载后，TCA可克服接地板的影响，其阻抗带宽可达10.4∶1（1.8~18.8 GHz）。

Abstract：The impedance bandwidth of tightly coupled array (TCA) is greatly effected by the ground plane when it is in-stalled on the platform of airplanes, missiles and naval ships. In view of this question, a novel ultra-wideband TCA with multilayer structure was designed by grid resistance frequency selective surface and interdigital dipole antenna. The perfor-mance of TCA with and without grid RFSS was compared by CST, the simulated result showed that the effect of ground plane was greatly restricted by loading a grid RFSS, the impedance bandwidth (VSWR<2) of TCA with grid RFSS was 10.4∶1 (1.8~18.8 GHz), while without grid RFSS the best bandwidth was 4.5∶1 (2.1~9.5 GHz).

作者：张君, 胡志慧, 曲洪东,

关键词：紧耦合天线阵列, 超宽带, 阻性频率选择表面, 偶极子天线, 多层结构,