物理学报Issue(21)：126-133,8.DOI:10.7498/aps.62.214101
基于电磁谐振分离的宽带低雷达截面超材料吸波体
Broadband low-RCS metamaterial absorber based on electromagnetic resonance separation
摘要
Abstract
We have designed and fabricated a broadband low radar cross section (RCS) metamaterial absorber with polarization-independent characteristic based on electromagnetic resonance. The absorbing mechanism is investigated by means of electric as well as magnetic field distributions and retrieval algorithm. Absorbing and RCS properties of this absorber are performed by waveguide experiment and free space measurements, respectively. Theoretical analysis indicates that the absorber can produce electric and magnetic resonances in different locations for fixed frequency, while for different frequencies, it can provide energy losses in different dielectric layers, which effectively lowers the electromagnetic couplings and consequently keep the strong absorbing properties in a wide frequency range. Experimental results show that the designed absorber with 3-layer structure achieves a frequency range which is 4.25 times as that of 1-layer absorber with absorptivity above 90%, its relative bandwidth for RCS reduction above 10dB is 5.1%. The cell size and thickness of the designed absorber are very small, i.e., 0.17 and 0.015 of the working wavelength. Thus the low-RCS property of the absorber is wide-angle and polarization-independent. In addition, the working frequency range of the absorber can be adjusted by properly designing the layers.关键词
超材料吸波体/雷达散射截面/宽带/电磁谐振Key words
metamaterial absorber/radar cross section (RCS)/broadband/electromagnetic resonance引用本文复制引用
杨欢欢,曹祥玉,高军,刘涛,李思佳,赵一,袁子东,张浩..基于电磁谐振分离的宽带低雷达截面超材料吸波体[J].物理学报,2013,(21):126-133,8.基金项目
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)和陕西省自然科学基础研究项目(批准号:SJ08-ZT06,2012JM8003)资助的课题.@@@@Project supported by the National Natural Science Foundation of China (Grant Nos.60671001,61271100), the Key Program of Natural Science Basic Research of Shaanxi Province, China (Grant No.2010JZ010), the China Postdoctoral Science Foundation (Grant No.2012T50878), and the Natural Science Basic Research of Shanxi Province, China (Grant Nos. SJ08-ZT06,2012JM8003) （批准号:60671001,61271100）
