Wideband RCS reduction using three different implementations of AMC structures
Wideband RCS reduction using three different implementations of AMC structures
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DOI：
10.1049/iet-map.2018.5024
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发表时间：
2019-04
期刊：
影响因子：
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通讯作者：
Bahare Zaki;Z. Firouzeh;Abolgasem Zeidaabadi-Nezhad;Mojtaba Maddah-Ali
中科院分区：
文献类型：
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作者：
Bahare Zaki;Z. Firouzeh;Abolgasem Zeidaabadi-Nezhad;Mojtaba Maddah-Ali
本文提出了两种新的AMC结构，在4.97- 17.15GHz的宽带频率范围内具有相位差。给出了两种AMC结构的三种实现方式：周期棋盘结构、非周期棋盘结构和随机结构。周期性棋盘结构在两个模型。在第一个模型中，在9.3-16.9 GHz的频率范围内，RCS降低> 9.6 dB，相当于58.02%。在第二个模型中，在8.1-16.9 GHz的频率范围内，RCS降低>7.8 dB，相当于70.4%。第二种模型通过FMB参数、双站和单站RCS进行了分析。为了提高雷达散射截面减缩带宽，提出了新的非周期棋盘结构和最优随机结构，其减缩带宽分别为81.67%和98.69%。在非周期性和随机结构中，反射场在许多方向上更均匀地散射。因此，三维双站RCS方向图得到了很大的改善。为了验证仿真结果，制作了周期棋盘结构的第二种模型，并进行了RCS减缩测量，与仿真结果吻合较好。
Here, two new AMC structures are presented with phase difference in wideband frequency of 4.97–17.15 GHz. Three implementations of two AMC structures are presented, which include periodic checkerboard structure, aperiodic checkerboard structure, and randomised structure. The periodic checkerboard structure is presented in two models. In the first model, the RCS is reduced > 9.6 dB in the frequency range of 9.3–16.9 GHz, which is equivalent to 58.02%. In the second model, the RCS is reduced >7.8 dB in the frequency range of 8.1–16.9 GHz, which is equivalent to 70.4%. The second model is analysed through FMB parameter, bistatic and monostatic RCS. For improving the RCS reduction bandwidth, the new aperiodic checkerboard structure and the optimal randomised structure are presented with bandwidth of 81.67 and 98.69%, respectively. In aperiodic and randomised structure, the reflected field is scattered more uniformly in many direction. Therefore, the 3D bistatic RCS pattern is improved greatly. For validating the result of simulation, the second model of periodic checkerboard structure is fabricated and RCS reduction is measured, which are in good agreement with simulation results.