中文摘要：

本文研制了一种新型可用于低可见平台的超宽带扇形天线.该扇形天线利用由一个矩形条带和对称分布在该矩形条带上的8个圆弧条组成的扇形结构设计天线的辐射单元;利用两边倒有90度圆弧角的矩形设计辐射地板;并将辐射单元和辐射地板分别印制在FR-4介质材料板（介电常数为4.4）的两侧.研究天线的辐射和散射特性,并与参考天线作对比,发现在满足超宽带天线的相关指标要求下,本文提出的天线具有良好的雷达截面减缩效果.本扇形天线适用于对超宽带天线有低雷达截面要求的场合.

英文摘要：

A novel fan-shaped antenna is presented for ultra-wideband application on low-observable platforms.The structure of the radiating element of the fan-shaped antenna is composed of eight arc patches that are symmetrically arranged along a rectangle;the structure of the radiating ground is a rectangle with two rounding chamfers.The radiating element and ground plane are printed on the top and bottom surfaces of the FR-4 with dielectric permittivity of 4.4,respectively.Its radiation and scattering characteristics are studied and compared with that of a reference antenna.The results show that the fan-shaped antenna has favorable UWB-related performances and lower RCS than the reference antenna.The fan-shaped antenna serves as a good candidate for the future design of UWB antennas with a requirement of RCS control.