人工磁导体正交布阵的宽带低雷达截面反射屏

基于互补开口谐振单环 (complementary split ring resonator, CSRR) 的电磁特性, 设计了一种新型人工磁导体 (artificial magnetic conductor, AMC) 结构 CSRR-AMC. 通过与方形贴片人工磁导体的反射相位对比发现, 该结构在X极化和Y极化波垂直照射条件下可分别实现小型化和多同相反射频带. 基于此特性, 设计了一种仅由单一CSRR-AMC结构组成的宽带低雷达截面反射屏. 该设计将相邻CSRR-AMC单元正交化排布, 通过优化单元结构实现宽带相位对消, 降低后向散射能量. 测试结果表明, 样品在7.38–10.47 GHz 范围内后向RCS减缩量达到10 dB以上, 相对带宽达到34.6%, 为宽带低反射屏设计提供了新的方法. 关键词： 人工磁导体 相位对消 宽带 雷达截面减缩

A wideband low RCS reflection screen based on artificial magnetic conductor orthogonal array

Based on the electromagnetic properties of complementary split ring resonator (CSRR), a novel artificial magnetic conductor (AMC), CSRR-AMC, is designed. The comparison of the reflection phase with square patch AMC reveals its features of miniaturization and multiband in-phase reflection, under X- and Y-polarized normal incident waves, respectively. Inspired by the reflection phase difference under different incident conditions, we have designed a wideband low rader cross-section (RCS) reflection screen with a single CSRR-AMC structure. The CSRR-AMC arrays are orthogonally positioned and the backscattering energy is reduced as a result of phase cancellation. Measured results demonstrate that -10dB RCS reduction is achieved in a wide frequency range of 7.38–10.47 GHz and the relative bandwidth is 34.6%, providing a new method for the design of wideband low scattering structure.
Keywords： AMC phase cancellation wideband RCS reduction