基于差分进化算法的阵列天线化设计毕业论文.doc

本科毕业设计论文  题 目 基于差分进化算法的阵列天线优化设计 学 院 电子工程学院 专 业 电子信息工程 学生姓名 导师姓名 摘 要 随着现代信息技术和计算机技术渗透到各个科学领域，人类正在步入一个科技迅速发展的新时期。一种新颖的演化算法即差分进化算法在各种演化算法中脱颖而出，差分进化是一种基于群体差异的启发式随机有哪些信誉好的足球投注网站算法，因原理简单、受控参数少、鲁棒性强等特点，在许多方面得到了广泛应用。 为了达到给定阵列天线方向图的指标要求，本文将差分进化算法用于阵列天线方向图的综合之中。首先介绍了差分进化算法的基本原理及阵列天线的基本理论，然后采用差分进化算法分别实现了一维点源阵列和二维点源阵列的方向图综合。研究了低副瓣和在指定角度形成零点时的方向图综合情形，并讨论了算法的收敛情况。结果表明，该算法能得到满足设计要求的方向图，且具有较快的收敛速度。 关键词：方向图综合 差分进化 零点形成 差分策略 ABSTRACT With the development of modern information technology and computer technology in every fields of science, humanity is moving into a new period when science and technology are quickly developed. A novel algorithm called differential evolution algorithm is talent showing itself among various evolutionary algorithm. Differential evolution is a population-based heuristic random search algorithm differences, because simple in principle, less controlled parameters, and robustness features, has been widely used in many applications. Therefore, differential evolution algorithm for its excellent performance to global search and the objective function which does not require differentiability and continuity conditions, in recent years is widely used among the array antenna pattern synthesis. To meet the pattern requirements of a certain array antenna, the differential evolution algorithm was used to synthesis of array antenna pattern in this thesis. Firstly the relevant principle of the differential evolution algorithm and the basic theory of the array antenna are introduced., Then a one-dimensional and a two-dimensional point source arrays are synthesized respectively by using the differential evolution algorithm. The requirements of lowest sidelobes and formation of the designated zero-point are considered in the pattern synthesis. The convergence of the algorithm is discussed. The results show that the algorit