摘要
在现有等离子体隐身研究中,几种特定的等离子体电子密度分布被广泛讨论。而对于任意等离子体密度分布,现有研究较少且缺乏统一的框架。针对该问题,提出了根据频段吸波需求逆向设计等离子体参数分布的方法,使用切比雪夫多项式来逼近等离子体频率空间分布。利用数值方法进行优化,得到在给定吸波频段内吸收率最大的最优多项式系数。等离子体吸波结构的反射系数由分层递推方法仿真计算,给出了在5~15 GHz频段内,不同厚度下吸收效率最高的设计方案,最终实现5 cm厚度下频段内反射率低于-11.0 dB,10 cm厚度下低于-21.36 dB。结果表明,该方法比传统方法目的清晰,允许对指定波段吸波进行逆向设计。
In research on plasma stealth,and several specific plasma electron density distributions are widely discussed.For arbitrary plasma density distributions,on the other hand,there are fewer existing studies and lack of a framework.Therefore,to address this problem,this work proposes a method to reverse design the plasma parameter distributions according to the frequency band absorption requirements,using Chebyshev polynomials to approximate the plasma frequency spatial distributions.Using several numerical methods,the optimal polynomial coefficients under the required conditions are calculated to maximize the absorption rate for a given absorbing band.The reflection coefficients of the plasma absorbing structure are simulated by the hierarchical recursive method.The optimization at different thicknesses respectively gives the design scheme with the highest absorption efficiency in the 5~15 GHz,with reflections lower than-11.0 dB in the band at a thickness of 5 cm,and lower than-21.36 dB at a thickness of 10 cm.The results show that the method has a clearer purpose than the traditional method,allowing for the reverse design of the absorption in the specified band.
作者
王咏歌
姚静锋
李健飞
袁承勋
周忠祥
WANG Yongge;YAO Jingfeng;LI Jianfei;YUAN Chengxun;ZHOU Zhongxiang(School of Physics,Harbin Institute of Technology,Harbin 150001)
出处
《飞控与探测》
2025年第4期20-26,共7页
Flight Control & Detection
基金
国家重点研发计划(2022YFE0204100)
国家自然科学基金(12205067,12175050)
哈尔滨工业大学青年拔尖计划(AUGA5710053224)。
