Design of graded honeycomb radar absorbing structure with wide-band and wide-angle properties
Design of graded honeycomb radar absorbing structure with wide-band and wide-angle properties
复制标题
宽带广角渐变蜂窝雷达吸波结构设计
DOI：
10.1017/s1759078718001460
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发表时间：
2019
影响因子：
1.4
通讯作者：
Xi Xiaoli
中科院分区：
文献类型：
--
作者：
Zhao Yuchen;Ren Fang;He Li;Zhang Jinsheng;Yuan Yanning;Xi Xiaoli
摘要 本文提出了一种分级蜂窝雷达吸波结构（RAS）的设计，以实现宽带宽和大范围角度的吸收。对于横向电偏振和横向磁偏振，当入射角 <45° 时，反射率至少降低 10 dB，当入射角 <55° 时，反射率降低 8 dB，当入射角 <70° 时，反射率降低 5 dB，分数带宽超过 118.6%。同时文献中均匀涂层蜂窝RAS的10 dB降低上限约为30°，当入射角大于55°时，其就失去了吸波能力。此外，我们设计的总厚度为10.7毫米，仅为理论限制的约1.29倍。计算、模拟和测量结果之间的良好一致性证明了该优化的有效性。
Abstract In this paper, the design of a graded honeycomb radar absorbing structure (RAS) is presented to realize both a wide bandwidth and absorption over a wide range of angles. For both transverse-electric and transverse-magnetic polarization, a fractional bandwidth of more than 118.6% is achieved for at least a 10 dB reflectivity reduction when the incident angle is <45°, an 8 dB reduction when the incident angle is <55° and a 5 dB reduction when the incident angle is <70°. Meanwhile the 10 dB reduction upper angle limit is approximately 30° for the uniform coating honeycomb RAS in the literature, which loses its absorbing ability when the incident angle is larger than 55°. Furthermore, the total thickness of our design is 10.7 mm, which is only approximately 1.29 times that of the theoretical limitation. The good agreement between the calculated, simulated, and measured results demonstrates the validity of this optimization.