Planar Octagonal-Shaped UWB Antenna With Reduced Radar Cross Section
Planar Octagonal-Shaped UWB Antenna With Reduced Radar Cross Section
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DOI：
10.1109/tap.2014.2313855
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发表时间：
2014-06-01
影响因子：
5.7
通讯作者：
Cakir, Gonca
中科院分区：
文献类型：
--
作者：
Dikmen, Cengizhan M.;Cimen, Sibel;Cakir, Gonca
设计并通过实验演示了一种用于超宽带（UWB）应用的新型平面八角形天线，其具有减小的雷达截面（RCS）。使用几何整形方法对所提出的天线进行修改，以减少 RCS。该方法基于减去印刷天线表面上电流分布最小的金属区域。参考和修改的八角形天线均在 2.5-18 GHz 频率范围内工作，分数带宽为 %151。进行全波电磁模拟和实验室测量，以将其 RCS 表征为频率、辐射模式和散射特性的函数。改进后的天线辐射性能稳定，与参考天线一致。结果还表明，与参考天线相比，设计的 UWB 天线具有更低的 RCS。在整个工作带宽内，RCS 降低了约 10 dBsm。设计的天线具有高达 25 dBsm 的 RCS 大幅降低，特别是在低频范围内。
A novel planar octagonal-shaped antenna with reduced radar cross section (RCS) for ultra-wideband (UWB) applications is designed and demonstrated experimentally. The proposed antenna is modified using the geometrical shaping method in order to get the RCS reduction. This method is based on the subtraction of metal areas which have the minimum current distributions on the surface of printed antenna. Both of the reference and modified octagonal-shaped antennas are operating at 2.5-18 GHz frequency range with %151 fractional bandwidths. The full-wave electromagnetic simulations and laboratory measurements are performed to characterize their RCSs as a function of frequency, radiation patterns and scattering characteristics. The radiation performance of modified antenna is stable and consistent with the reference antenna. Also the results show that the designed UWB antenna has lower RCS compared to the reference antenna. About 10 dBsm RCS reduction is obtained in the whole operation bandwidth. The designed antenna has very large RCS reduction up to 25 dBsm, especially in the low frequency range.