8 Approximation Methods
Most electromagnetic boundary problems, whether formulated as differential equations or as integral equations, cannot be solved in closed form. We therefore have to find approximate solutions, in either analytical or numerical form. In this chapter, we will present several types of analytical approximation methods that are particularly appropriate for problems formulated as integral equations (although they have much more general applicability), and apply them to some practical problems.
8.1 RECURSIVE PERTURBATION APPROXIMATION
Often, a good deal of insight into the solution of a problem can be obtained by studying some approximation of it. In this section, we examine the approximate solution of integral ...
