摘要
从仿真计算、实验验证、理论分析三方面研究了混响室内发射天线位置、搅拌器位置及形状对混响室场分布的影响。采用遗传算法分别对混响室的发射天线位置、搅拌器位置及形状、混响室全局进行了优化。研究表明:相对于对发射天线位置进行优化,对搅拌器位置及形状进行优化得到的场均匀性更佳,综合评价函数值F随初始群体中的个体变化更剧烈,说明场分布对搅拌器的变化更敏感;而对混响室全局优化场均匀性最好,F随初始群体中的个体变化也最剧烈。理论分析验证了仿真结果的正确性。
Effect of positions of transmit antenna and stirrer,shape of stirrer on field distribution in a reverberation chamber is analyzed from simulation,experimental verification and theoretical analysis.Genetic algorithm is applied to optimize positions of transmit antenna and stirrer,shape of stirrer and the global in a reverberation chamber.The results show that,compared with optimizing the position of transmit antenna,the field uniform is much better and the comprehensive evaluation function F changes more intensively when optimizing the position and stirrer of stirrer,which shows that field distribution is more sensitive to stirrer than transmit antenna;the field uniform is best and the comprehensive evaluation function F changes the most intensively when optimizing the global of the chamber.The mechanism that key arrangement have an effect on field distribution is studied through theoretical analysis,the essence of chamber optimization is revealed.The results of simulation is identical with theoretical analysis.The results of simulation is verified.
出处
《电波科学学报》
EI
CSCD
北大核心
2011年第6期1107-1112,1227,共7页
Chinese Journal of Radio Science
基金
国家自然科学基金资助项目(No.61040003)
国防科技重点实验室基金项目(No.9140C87030310JB3402)
关键词
混响室
发射天线
搅拌器
遗传算法
场均匀性
优化
reverberation chamber
transmit antenna
stirrer
genetic algorithm
field uniformity
optimization
