一种具有吸波和相位相消特性的共享孔径雷达吸波材料

发布时间：2018-08-19 12:24

【摘要】：提出了共享孔径雷达吸波材料(shared aperture radar absorbing material,SA-RAM)的设计方法.该方法将无源人工电磁媒质(metamaterials,MTM)的散射问题等效为有源阵列的辐射问题进行研究,利用阵列天线原理对有限周期MTM单元构成的MTM子孔径的位置信息、幅度信息、相位信息进行优化设计,实现具有不同功能的SA-RAM.在此基础上,设计了一种基于人工磁导体(artificial magnetic conductor,AMC)子孔径和完美吸波体(perfect metamaterial absorber,PMA)子孔径的SA-RAM,该SA-RAM通过将AMC子孔径与PMA子孔径交错布阵,实现了具有吸波和相位相消特性的SA-RAM.仿真和实验结果表明,该SA-RAM较金属板的后向雷达散射截面(radar cross section,RCS)在5.5—8.3 GHz都有明显的减缩,在5.54 GHz处的减缩是由于PMA的高吸波率引起的,在7.0 GHz处的减缩是由于AMC子孔径和PMA子孔径相位相消引起的.研究结果对频域和空域隐身相结合的雷达吸波材料设计具有重要的指导意义.
[Abstract]:The design method of (shared aperture radar absorbing material SA-RAM is presented. In this method, the scattering problem of a passive artificial electromagnetic medium (MTM) is equivalent to the radiation problem of an active array. The position and amplitude information of the MTM sub-aperture of a finite period MTM element are obtained by using the array antenna principle. Phase information is optimized to realize SA-RAM with different functions. On this basis, a SA-RAM based on the sub-aperture of artificial magnetic conductor (artificial magnetic conductor and the perfect absorber (perfect metamaterial absorber is designed. By interleaving the AMC sub-aperture with the PMA sub-aperture, the SA-RAM with the characteristics of absorbing and phase canceling is realized. The simulation and experimental results show that the RCS of the SA-RAM is significantly reduced at 5.5-8.3 GHz than that of the metal plate, and the reduction at 5.54 GHz is due to the high absorbing rate of PMA. The reduction at 7.0 GHz is due to the phase cancellation of the AMC subaperture and the PMA subaperture. The results are of great significance to the design of radar absorbing materials in frequency domain and spatial domain.
【作者单位】：空军工程大学信息与导航学院;
【基金】：国家自然科学基金(批准号:60671001,61271100) 陕西省自然科学基础研究重点项目(批准号:2010JZ010) 中国博士后科学基金(批准号:2012T50878) 陕西省自然科学基础研究项目(批准号:SJ08-ZT06,2012JM8003)资助的课题~~
【分类号】：TN951

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