非线性目标谐波散射特性建模研究  被引量:1

Modeling of nonlinear target harmonic scattering characteristics

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作  者:李远哲 胡卫东[1,2] 范红旗[1,2] 朱畅[1,3] 杜小勇[1,2] LI Yuanzhe;HU Weidong;FAN Hongqi;ZHU Chang;DU Xiaoyong(College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China;National Key Laboratory of Science and Technology on Automatic Target Recognition,National University of Defense Technology,Changsha 410073,China;State Key Laboratory of Complex Electromagnetic Ef fects on Electronics and Information System,National University of Defense Technology,Changsha 410073,China)

机构地区:[1]国防科技大学电子科学学院,长沙410073 [2]国防科技大学自动目标识别重点实验室,长沙410073 [3]国防科技大学电子信息系统复杂电磁环境效应国家重点实验室,长沙410073

出  处:《电波科学学报》2020年第4期563-570,共8页Chinese Journal of Radio Science

摘  要:非线性目标的入射功率-散射谐波功率曲线(后文简称为谐波散射特性)对增强非线性探测系统的鲁棒性和后续的目标分类识别具有重大意义.本文研究了非线性目标谐波散射特性的建模方法和对应的参数求解方法.文章通过建立等效电路,导出了非线性伏安特性曲线与散射参数的关系模型,并提出一种基于优化的递进求精解法来提高模型参数的求解效率;以齐纳二极管的实测基波数据作为建模求解的测试示例,结果表明建模参数的仿真谐波曲线与测量的谐波曲线在测量功率段均符合较好.故本文建模方法可为后续更多非线性目标(如PIN管、三极管等)谐波散射特性的获取提供有益指导.The incident power and scattered harmonic power relation of nonlinear targets(hereinafter to be referred as harmonic scattering characteristics)demonstrates significant importance in enhancing the robustness of nonlinear detection systems and subsequent target identification and recognition.In this paper,the modeling method of the nonlinear target harmonic scattering characteristics and the corresponding parameter extraction are studied.By establishing an equivalent circuit,this paper derives the relation between the nonlinear volt-ampere characteristic curve and the scattering parameters and proposes a progressive optimization-based solution to improve the efficiency of parameter extraction.Zener diode fundamental wave data is used to illustrate the modeling process,and simulated harmonic scattering characteristics based on the modeled parameters show the consistency with its harmonic measurement.Therefore,the proposed method could be a beneficial reference for obtaining harmonic scattering characteristics of other nonlinear elements(such as PIN tubes,triodes,etc.).

关 键 词:谐波探测 非线性目标 等效电路模型 散射特性 齐纳二极管 

分 类 号:TN95[电子电信—信号与信息处理]

 

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