摘要
为优化得到给定形状的目标方向图,引入了一种基于DFP-BFGS无约束最优化算法的数值方法。优化过程是先对阵列各单元的激励幅度和相位同时优化,然后对得到的阵列激励幅度数据进行部分调整,使其更加均匀以便于馈电网络的设计。最后固定激励幅度分布,仅对相位数据进行优化。在实现对方向图主瓣波束赋形的同时,得到了较为均匀的激励幅度分布。该优化方法具有应用灵活和结果可调控的优点,是一种实现阵列天线波束赋形的实用方法。
To obtain a given target pattern,a numerical technique based on DFP-BFGS unconstrained optimization method is introduced.At first,the array elements＇ excitation amplitudes and phases are optimized at the same time.After that,the amplitude excitation data are adjusted slightly in order to simplify the feed network＇s design.Finally,fixing the excitations′ amplitude distribution,only the phase data are optimized.As a result,not only the main beam be shaped,but also obtained a reasonable excitation distribution data.The optimization method has the advantage of flexible in application and can obtain controllable results,so it is a valuable beam shaped method for array antennas.
出处
《微波学报》
CSCD
北大核心
2010年第5期46-49,共4页
Journal of Microwaves
基金
国家自然科学基金(60632020)
