天线模式项散射分析与天线RCS减缩
ANTENNA-MODE SCATTERING COMPONENT AND RCS REDUCTION
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摘要: 天线的散射场是由结构散射场和模式散射场两项组成。理论分析和实验结果表明,后者对天线的雷达散射截面(RCS)的贡献比前者要大得多,有效地克服模式散射场将会明显地降低天线的RCS。本文提出了一种以克服面天线模式散射场达到降低天线雷达截面的模式项消去法减缩天线RCS技术,并在几种天线模型上进行了实验。实验结果证明,这种技术减缩天线RCS的效果,不管在天线工作频带内还是频带外均可达到10～15dB。模式项消去法减缩技术是一种降低面天线RCS的新途径,比其它减缩技术频带更宽,具有较好的工程适用性。Abstract: The radar cross-section (RCS) of antennas can be divided in to two parts, one is the common structural scattering component, another is the antenna-mode scattering component produced by antenna s re-radiation. Three kinds of antenna s RCS are discussed and the measured antenna s RCS reduction by the method of minimizing the mode scattering component are given. The experimental results show that the RCS reduction is about 10-15 dB both in the operating band and outside the band. The technique expressed in th...
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