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Propagation constant - Definition and Overview |
| Related Words: Attenuation, Book, Breeding, Broadcast, Broadcasting, Circulation, Crossbreeding, Diffraction, Diffusion, Dilution, Dispersion, Display, Dissemination, Dissipation, Distribution, Divergence, Endogamy, Evaporation |
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For an electromagnetic field mode varying sinusoidally with time at a given frequency, the propagation constant is the logarithmic rate of change, with respect to distance in a given direction, of the complex amplitude of any field component.
Note: The propagation constant, λ, is a complex quantity given by λ = α +iβ, where α, the real part, is the attenuation constant and β, the imaginary part, is the phase constant.
Source: from Federal Standard 1037C
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