低雷达截面的新型超宽带单极子天线

摘要

针对超宽带天线的隐身问题,设计了一种新型的超宽带低雷达截面的单极子天线.测试结果显示天线-10 dB带宽范围为2.2～10.4 GHz,天线在2.5 GHz和8 GHz的方向图对称性良好.相比于参考天线,该新型天线的雷达截面(radar cross section,RCS)在带内的大多数频点实现了有效减缩.在最大增益损失不超过1 dB的情况下,实现了两个不同入射方向RCS的最大减缩量分别为6.4 dBsm和17.9 dBsm.该天线可应用于超宽带隐身平台上.%To solve the problem of ultra-wideband (UWB) antennas in stealth, a novel UWB monopole antenna with low RCS is designed. The measured results show that the range of the -10 dB impedance bandwidth is from 2. 2 to 10. 4 GHz, and the symmetry of radiation patterns in 2. 5 and 8 GHz is well. In comparison with the reference antenna, the RCS of the novel antenna has achieved effective reduction in most of the frequencies. With its largest gain loss about 1 dB in the whole operating frequencies, the largest values in RCS reduction with two different incident waves are 6. 4 dBsm and 17. 9 dBsm, respectively. This novel antenna can be applied in the UWB stealthy platform.