We discuss the following general problem: given a composite, made from at least two different materials with each its own (scalar, and possibly complex‐valued) ε and μ, distributed in space in a regular, crystal‐like, pattern, find the equivalent permittivity and permeability (they will, in general, be tensors). This is homogenization. A computation in which such repetitive composites are present can then be done by simply replacing these with their equivalent, homogenized, materials.
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A. Bossavit (1995) studied this question.
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