大气波导中电波传播特性的研究  

Study the propagation characteristic of radio wave in atmospheric duct

作　　者：杨超[1] 郭立新[1] 李宏强[1] 吴振森[1] 

机构地区：[1]西安电子科技大学理学院,陕西西安710071

出　　处：《西安电子科技大学学报》2009年第6期1097-1102,1138,共7页Journal of Xidian University

基　　金：国家部委科研项目资助;高等学校博士学科点专项科研基金资助(20070701010)

摘　　要：为研究电波在大气波导中的传播特性,针对传统分步傅里叶方法难以解决考虑阻抗边界条件时的电波传播问题,利用离散混合傅里叶方法求解有阻抗边界条件时的窄角抛物方程,并给出其详细的计算方法和求解步骤.在辅助函数的离散过程中用后向差分公式代替传统的中心差分公式,数值结果显示出良好的稳定性.这为大气波导环境中雷达性能评估、雷达盲区探测等工作的研究提供了理论基础.To investigate the propagation properties of radio waves in atmospheric duct, according to the fact that the traditional Split-step Fourier Transform method does not work well in treating the propagation problem with the impedance boundary condition, the Discrete Mixed Fourier Transform Method is used to solve the narrow angle parabolic equation with the impedance boundary condition is presented, and a detailed computational method and the solving step are also given. In the process of discretization of the auxiliary function, the traditional central difference formula is replaced by the backward difference formula, and numerical results show the method is of good stability. This approach establishes the theoretical foundation for studying the assessment of radar performance and radar detection shadow zone.

关 键 词：抛物方程 大气波导 传播损耗 离散正弦变换 

分 类 号：TN011[电子电信—物理电子学]