高频电磁场问题中的并矢Green函数方法

高频电磁辐射、散射问题中激励与响应之间的线性关系成立。这一关系可用一并矢变换函数给出。因此高频电磁场问题关键在寻求并矢变换函数。并矢格林函数理论能够给出典型电磁场问题激励与响应之间的线性关系，借助高频电磁场的局域性原理、传播与绕射遵循的费马原理，极易求得高频电磁场问题的并矢变换函数。本文讨论了高频电磁场问题中的并矢格林函数方法，研究了并矢格林函数方法在寻求并矢变换函数中的应用，得到部分工程问题的理     

关于矩形波导中电并矢格林函数的讨论

关于矩形波导中电并矢格林函数的讨论逯贵祯，司重生（北京广播学院２９信箱）目前，在电磁场理论的研究中，有许多文章讨论并矢格林函数。对并矢格林函数进行研究有着理论与实践上两方面的意义。从理论上讲，要解决矢量函数在源区的奇异性问题。从实践上讲，大量的数值计...     

并矢分析在电磁场求解中的应用

给出广义电磁场矢量和并矢波动方程的格林函数积分解,在物理定律和边界条件的约束下,用并矢分析的方法证明了两解的同解性,并对自由空间并矢格林函数的对称性进行了并矢分析展开验证。结合并矢分析法求解电磁场的两个应用实例,表明并矢分析法相对于传统方法具有简捷明了的特性。     

矢量波函数空间的电磁矢量恰当射影

提出了一种简化电磁场问题求解的新方法，将电磁场矢量的无旋场部分和无散场部分各自应用一个满足二阶方程的标量函数表示出来，然后由此分析了电磁场矢量在矢量波函数空间的恰当射影问题，并给出用一个标量格林函数构造的无散电磁场并矢格林函数。     

手征介质中并矢格林函数的讨论

本文讨论在手征介质中的广义矢量本征函数及并矢格林函数。已有的并矢格林函数展开式往往忽略了无旋本征函数（Ｌ）的贡献。在这篇文章中，我们首先给出矢势并矢格林函数的表达式，然后，利用手重量介质中矢势并矢格林函数与电并矢格林函数的关系求出了电并矢格林函数。     

微波屏蔽室内低频激励的场分布

本文将微波屏蔽室看成一矩形波导构成的谐振腔，采用并矢格林函数法计算了在激励源的工作频率低于屏蔽室主谐振频率时屏蔽室内电磁场的分布，并将理论计算结果与实验测试数据进行了比较，重复性较好。此结果可用于屏蔽室内泄漏电磁场对精密测量的干扰的定性分析。     

求解电磁场并矢格林函数的新方法

本文提出了求解电磁场边值问题的新方法:把矢量波方程的边值问题化为对应的标量波方程的边值问题加上两个附加的矢量微分运算的问题。用这种方法可以很方便地求解所有现在用并矢格林函数的本征展开法所能求得的各种并矢格林函数。可以求解用现有的方法很难求解的比较复杂系统的并矢格林函数。文中给出了加载的谐振腔的并矢格林函数就是其中的一例。     

关于矩形腔电并矢格林函数的讨论

本文通过对Tat所给出的短形胶的电并矢格林函数形式进行变换，发现这类并矢格林函数形式的空间不对称性，即选择不同的方向作为领示矢量，所得到的并失格林函数形式是不同的，这在物理上显然是不合理的。     

无辐射介质波导中的并矢格林函数

本文利用本征函数展开法推导了无辐射介质(NRD)波导中的并矢格林函数,给出了其中电型并矢格林函数的完备形式。     

理想导电凸曲面上振子电磁辐射UTD解的并矢格林函数方法

P.H.Pathak,Wang Nan等人在研究典型问题几何绕射理论之后,于1981年发表了任意导电凸曲面振子天线高频电磁辐射一致性几何绕射理论近似解。本文应用并矢格林函数方法,通过典型曲面高频电磁辐射一致性近似解的研究和推广,导出了理想导电凸曲面上电、磁振子电磁辐射场在高频近似下一致性几何绕射理论近似解。与P.H.Pathak,Wang Nan等人的结果相比,主项并矢转移函数除个别系数外完全相同,高阶并矢转移函数在几何光学区略有差异。     

介质涂敷导电凸曲面上磁振子辐射场一致性几何绕射理论

本文研究了介质涂敷导电凸曲面上磁振子辐射与绕射一致性高频渐近理论。文中在典型曲面辐射场一致性高频近似解基础上发展了介质涂敷导电凸曲面上磁振子辐射与绕射的一致性几何绕射理论,导出了涂敷导电凸曲面上磁流源高频电磁辐射场的一致性几何绕射理论公式。在这个公式中,辐射与绕射场用四个广义Ｆｏｃｋ型函数表示,深光区这些函数退化为几何光学场,暗区场则表示为不同模式爬行波的叠加。     

A NEW METHOD FOR SOLVING DYADIC GREEN''''S FUNCTION OF ELECTROMAGNETIC FIELD

A new method for solving electromagnetic field boundary value problem is given.Byusing this method,the boundary value problem of the vector wave equation can be transformedinto the independent boundary value problem of scalar wave equations and the two additionalvector differential operations.All the dyadic Green's functions got by eigenfunction expansionof the dyadic Green's function can be got by this method easily and some of the dyadic Green'sfunctions for complex systems which are very difficult to get by the ordinary method have beengot by this new method.The dyadic Green's function for a dielectric loaded cavity is one of thegiven examples.     

A new method for solving Dyadic Green’s Function of electromagnetic field

A new method for solving electromagnetic field boundary value problem is given. By using this method, the boundary value problem of the vector wave equation can be transformed into the independent boundary value problem of scalar wave equations and the two additional vector differential operations. All the dyadic Green’s functions got by eigenfunction expansion of the dyadic Green’s function can be got by this method easily and some of the dyadic Green’s functions for complex systems which are very difficult to get by the ordinary method have been got by this new method. The dyadic Green’s function for a dielectric loaded cavity is one of the given examples. This project is supported by the National science Fundation of China     

含源多层弱起伏介质中的电磁场

本文在Born近似下提出了求解含源多层随机介质的电磁场的并矢格林函数方法。激发源可以在N层随机介质中的任意一层。在背景介质的任一层均为各向同性慢变分层的假定下,利用W.K.B近似及电型和磁型并矢格林函数,导出了N层介质中任意一层中的平均场和起伏场,并用反射系数、透射系数、阻抗、电导和波数比等物理量表示。     

The Green's Dyadic for Radiation in a Bounded Simple Moving Medium

The studies here show that the wave equation for electromagnetic wave propagation in an isotropic and uniformly moving medium is solvable by the separation method in four coordinate systems. Solutions in the form of complete sets of eigenfunctions are possible for problems where boundary surfaces are presented. A Green's dyadic for finite or semi-infinite domain problems involving sources in the moving medium has been formulated through vector operation on the eigenfunction solutions of the homogeneous wave equation. The case of electromagnetic waves excited by a current loop, immersed in a moving medium, and confined by a circular cylindrical waveguide, was examined. The electric and magnetic field intensities in such a waveguide were compared with those obtained through a different approach. The Green's dyadic for electromagnetic waves in an infinite domain moving medium was shown to be obtainable from the finite domain Green's dyadic through a limiting process.     

SOLVING THE PROPAGATION OF ELECTROMAGNETIC WAVE IN A SIMPLE TWO—DIMENSI8ONAL INHOMOGENEOUS MEDIUM BASED ON SYMPLECTIC GEOMETRICAL THEORY

A new symplectic geometrical high-frequency approximation method for solving the propagation of electromagnetic wave in the two-dimensional inhomogeneous medium is used in this paper. The propagating caustic problem of electromagnetic wave is translated into non-caustic problem by the coordinate transform on the symplectic space. The high-frequency approximation solution that includes the caustic region is obtained with the method combining with the geometrical optics. The drawback that the solution in the caustic region can not be obtained with geometrical optics is overcome by this method. The results coincide well with that of finite element method.     

A note on using dyadic Green's functions on spheres and cones

The objective of this article is to alert antenna engineers to a possible error that may occur when working with dyadic Green's functions associated with conical geometries. For example, such problems can arise when designing microstrip antennas on a conical surface, or when dealing with scattering caused by conical geometries. The dyadic Green's function is a very useful tool for obtaining the interaction of electromagnetic fields with several physical geometries. With this technique, the engineer can formulate various canonical electromagnetic problems in a systematic manner, to avoid having to treat many special cases. However, in dealing with conical geometries, special care must be taken