涂覆多针状晶须吸收剂的蜂窝吸波结构等效电磁参数计算方法研究

项目名称： 涂覆多针状晶须吸收剂的蜂窝吸波结构等效电磁参数计算方法研究

项目编号： No.61501369

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 赵雨辰

作者单位： 西安理工大学

项目金额： 19万元

中文摘要： 相比于实物测试和全波分析，使用等效电磁参数可以大大提高蜂窝吸波结构优化设计的效率。然而，由于蜂窝吸波结构的等效电磁参数受到单元结构、吸收剂电磁参数等诸多因素的影响，现有计算方法的精度仍难以满足实际应用的需要。为此，本项目结合雷达波吸收剂的研究现状和发展趋势，研究涂覆多针状晶须吸收剂的蜂窝吸波结构等效电磁参数计算方法。拟：①提出“等效粒子+强扰动理论”的多针状晶须吸收剂等效电磁参数计算方法，该方法同时考虑了多针状晶须的个体粒子和群体网络的影响，因而所得到的闭式表达式具有更高的计算精度；②提出“低频初值+色散特性”的蜂窝吸波结构等效电磁计算方法，该方法通过将以低频初值为主的传统闭式表达式扩展为低频初值和色散特性两部分来提高等效电磁参数的计算精度；③基于所提出的等效电磁参数计算方法对涂覆多针状晶须吸收剂的蜂窝吸波结构进行优化设计。研究成果将进一步为实际工程提供更为高效精确的理论分析和设计方法。

中文关键词： 隐身特性散射计算；雷达波吸收剂；蜂窝吸波结构；等效电磁参数；优化设计

英文摘要： Comparing with experimental method and full-wave analysis, the efficiency of honeycomb absorbing structure design can be greatly enhanced by using the effective electromagnetic parameters. However, due to the complexity of honeycomb unit structure, effective electromagnetic parameters of absorbent and many other factors, the accuracy of existing calculation methods is still difficult to meet the need of application. Consequently, combining with the research status and development trend of radar wave absorbent, this project focuses on the calculation method of effective electromagnetic parameters of honeycomb absorbing structure coated with multi-needle whisker absorbent. Therefore, the aims of this project are as follows. ①This project presents a novel “equivalent particle + strong fluctuation theory” method to calculate the effective electromagnetic parameters of multi-needle whisker absorbent. By considering the special characteristics of a single multi-needle whisker and the complex effect of conductive network which is composed of many whiskers, the obtained closed-form expression can improve the calculation accuracy of effective electromagnetic parameters of multi-needle whisker absorbent. ②This project proposes a novel “low-frequency initial value + dispersion characteristics” method to calculate the effective electromagnetic parameters of honeycomb absorbing structure. This method enhances the calculation accuracy of effective electromagnetic parameters by extending the traditional closed-form expressions into a new expression which consists of both initial value part and dispersion characteristics part. ③The honeycomb absorbing structure coated with multi-needle whisker absorbent is optimized based on the proposed calculation method. This project can provide more efficient and accurate method for theoretical analysis and optimization design of practical engineering.

英文关键词： Scattering calculation of stealth characteristics;Radar absorbent;Honeycomb absorbing structure;Effective electromagnetic parameters;Optimization design