文档介绍：第 39 卷第 1 期电子科技大学学报
2010年1月 Journal of University of Electronic Science and Technology of China Jan. 2010
BP神经网络天线方向图获取方法研究
姜正茂,杨建宇,李良超
(电子科技大学电子工程学院成都 610054)

【摘要】焦平面阵列成像体制是实现无源毫米波实时成像的主要途径。焦平面体制存在馈源偏焦的问题,导致成像系统
的点扩展函数(PSF)具有空变特性。为研究毫米波焦平面阵列成像点扩展函数的空变规律,提出采用BP神经网络生成偏焦位置
的空变方向图。通过分析天线方向图数据的特点,研究了BP神经网络的结构形式和输入输出数据格式的设计方法,并通过实
验方法确定了网络的隐层形式。实验结果表明,%的精度。
关键词方向图; BP神经网络; 焦平面; 无源毫米波
中图分类号文献标识码 A doi:.1001-

Antenna Pattern Generation by BP work

JIANG Zheng-mao, YANG Jian-yu, and LI Liang-chao
(School of Electronic Engineering, University of Electronic Science and Technology of China Chengdu 610054)

Abstract Focus plane array has been widely used in real-time Passive millimeter wave (PMMW) imaging.
But its antenna pattern nonhomogeneity because of feed lateral displacement results in space variance of point
spread function (PSF) in PMMW image. In order to study plicated space-variant law of PSF, an approach is
proposed to generate antenna patterns of offset feeds by back propagation (BP) work. By analyzing the
characteristics of data of antenna pattern, the structure with its input/output data formats of the work are
discussed. Experimental results demonstrate that the antenna pattern generated by the work with double
hidden layers exhibits a precisio