混响室发射天线指向对场均匀性影响研究  

Effect of Directionality of Transmitting Antenna on Field Uniformity in Reverberation Chamber

作　　者：崔耀中 魏光辉 范丽思 万浩江 陈亚洲 贾明捷[2] 

机构地区：[1]军械工程学院强电磁场环境模拟与防护技术国防科技重点实验室,石家庄050003 [2]北京航空工程技术中心,北京100076

出　　处：《微波学报》2011年第6期42-46,共5页Journal of Microwaves

基　　金：国家自然科学基金(51077132);国防科技重点实验室基金(9140C87030310JB3402)

摘　　要：采用基于矩量法的电磁仿真软件FEKO建立了混响室仿真模型,并对步进模式下的混响室模型进行了数值计算。将混响室数值计算与遗传算法相结合,通过仿真计算与理论分析研究了混响室发射天线指向对场均匀性的影响。研究结果表明:改变发射天线指向,其本质是改变混响室各模式前的加权系数,导致表征混响室工作区域场均匀性的电场标准偏差随之发生改变。发射天线指向处于最优配置时,工作区域各轴向电场标准偏差较初始状态有所下降,说明通过优化提高了工作区域场均匀性。The model of reverberation chamber has been built with software FEKO based on moment of method.The model working at stepped tuner rotation has been numerically calculated.The method of genetic algorithm combining with moments of method has been put forward.Effect of directionality of transmitting antenna on field uniformity in reverberation chamber has been investigated through simulation and theoretic analysis.The results show that: changing directionality of transmitting antenna is essentially changing the weight of the mode inside the chamber,so that the field deviations which represents the field uniformity also is changed.When the directionality of transmitting antenna is optimal,the field deviation of every axis is decreased,which illustrates that the field uniformity has been improved.

关 键 词：混响室 发射天线 遗传算法 矩量法 场均匀性 

分 类 号：TN827.1[电子电信—信息与通信工程] TN03