25Electromagnetic Scattering

25.1 Background

Electromagnetic scattering problems formulated using the Cauchy integral (see Chapter 24) lead to a system of linear equations. The simplest useful case is perfect reflection, as for a perfect electrical conductor sitting in free (non‐conducting) three‐dimensional space. The formulation gives a linear system (Seagar 2016):

where g is a boundary field derived from the incident field, upper P Superscript minus and upper Q Superscript plus are projection operators, upper I is the identity operator, and f is the unknown reflected (scattered) field at the boundary1. The linear system for general values of material properties is given in Seagar (2016).

In essence, Eq. (25.1) is a linear system where g is the known data vector, is the unknown vector, and the term in parentheses is a matrix . The individual ...

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