基于最优化方法的平面波综合理论及其应用

项目名称： 基于最优化方法的平面波综合理论及其应用

项目编号： No.60801038

项目类型： 青年科学基金项目

立项/批准年度： 2009

项目学科： 金属学与金属工艺

项目作者： 于丁

作者单位： 西安电子科技大学

项目金额： 18万元

中文摘要： 为了解决平面波综合技术中的关键问题，提高近场辐射与散射测量的效率和精度，本项目拟采用理论分析、计算机模拟和实验测试相结合的方法，对基于最优化方法的平面波综合理论进行研究，并将其应用于近场辐射与散射测量中，以提高测试效率和精度。分析平面波综合技术中，相关技术指标和参数以及口径窗口函数对综合出的准平面波的幅相均匀度的影响。提出基于最小二乘法的平面波综合方法以及基于全局优化算法的平面波综合方法，并通过计算机模拟证实其较传统方法的优越性。在此基础上，将口径窗口函数应用于近场辐射与散射测量中，通过对近场数据进行加窗处理有效提高测试效率和精度。建立基于最小二乘法平面波综合以及基于全局优化算法平面波综合的近远场变换理论和算法，并将其应用于近场辐射与散射测量中以有效提高测试效率和精度。

中文关键词： 最优化方法；平面波综合；最小二乘法；全局优化算法；近场辐射与散射测量

英文摘要： In order to solve the key problems in the plane-wave synthesis technique and improve the efficiency and accuracy in near-field radiation and scattering measurements, by means of the method of the combination of theoretical analysis, computer simulation and experimental measurement, the theory of plane-wave synthesis based on the optimization methods is studied and applied in near-field radiation and scattering measurements so as to improve the measurement efficiency and accuracy in this project. The effect of the correlative technique indexes and parameters and the aperture window function on the uniform degree of the amplitude and phase of the synthesized quasi-plane wave is analyzed in the plane-wave synthesis technique. The plane-wave synthesis methods based on the least square method and the global optimization algorithm are presented and the advantages compared to the traditional method are proved by computer simulation. On the basis of above study work, the aperture window function is applied in near-field radiation and scattering measurements and the measurement efficiency and accuracy are improved effectively by the data processing of applying the aperture window function on the near-field data. The theory and algorithms of near-field to far-field transformation on the basis of the plane-wave synthesis methods based on the least square method and the global optimization algorithm are eatablished and applied in near-field radiation and scattering measurements so as to effectively improve the measurement efficiency and accuracy.

英文关键词： Optimization methods; Plane-wave synthesis; Least square method; Global optimization algorithm; Near-field radiation and scattering measurements