Abstract
We consider a narrowband signal (see Chapter 4) in a lossless time-invariant isotropic medium of parameters ε0ε and μ0μ, whose relative permittivity ε and permeability μ may be space-dependent. We define the free-space propagation constant \( {k_0} = \sqrt {{\varepsilon _0}{\mu _0}} \), the free-space intrinsic impedance \( {\zeta _0} = \sqrt {{{{\mu _0}} \mathord{\left/ {\vphantom {{{\mu _0}} {{\varepsilon _0}}}} \right. \kern-\nulldelimiterspace} {{\varepsilon _0}}}} \), and the relative refractive index \( n = \sqrt {\varepsilon \mu } \), space-dependent in general.
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© 1997 Springer Science+Business Media New York
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Franceschetti, G. (1997). High-Frequency Fields. In: Electromagnetics. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-0257-3_5
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DOI: https://doi.org/10.1007/978-1-4899-0257-3_5
Publisher Name: Springer, Boston, MA
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