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green function for a EM fild problem like a delta fuction for linear system.I donot know which software can solve arbitary EM structure's green fuction.
Green function is the response of system to dirac impulse. I.e. wave equation in 3D has Green function of type exp(jkR)/R which represents spherical waves.
In moment method Green function (more complicated because of dielectric layers) is used to compute the impedance matrix [Z].
Equation [E]=[Z][J] is solved to get unknown current distribution J. E is given by boundary conditions of structure.
See Numerical Methods in Electromagnetics (CRC press) available at MCU or e-books section here.
Green's function is very important when you solve EM with MOM(method of moment), usually, it can be divided :scalar green's function and dadyic green's function, maybe you can read Prof. Tai's book: dadyic green's function in electromagnetic theory.
Green's function is very important when you solve EM with MOM(method of moment), usually, it can be divided :scalar green's function and dadyic green's function, maybe you can read Prof. Tai's book: dadyic green's function in electromagnetic theory.
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