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提出了宽带雷达散射截面(radar cross section,RCS)减缩人工磁导体复合结构,通过将多个金属方片周期结构相复合,进一步拓展了其工作带宽.测试结果表明,反射率小于10dB的频段为7.7—13.1GHz,相对带宽为51.9%.通过全波仿真研究了其在不同频率的散射特性,随着频率的增加,在对角象限平分面上的反射峰逐渐向法线方向靠拢,但其RCS较金属板的后向RCS仍减小8dB以上.该人工磁导体复合结构具有工作带宽大、设计简单和加工容易等优点,具有重要的应用前景.
The wideband radar cross section (RCS) reduction composite magnetic conductor structure is proposed, and its working bandwidth is further expanded by compounding the periodic structure of several metal squares.The test results show that the frequency band with reflectivity less than 10dB is 7.7-13.1GHz, the relative bandwidth is 51.9%. The scattering characteristics at different frequencies are studied by full-wave simulation. As the frequency increases, the reflection peak on the diagonal quadrant gradually approaches the normal, but its The RCS of the RCS is still more than 8dB more than that of the metal plate. This artificial magnetic conductor composite structure has the advantages of large working bandwidth, simple design and easy processing, and has an important application prospect.