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IEVref:731-03-29ID:
Language:enStatus: Standard
Term: group velocity
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Definition: the velocity vector at a point, in a propagation medium, of a signal which may be ideally represented by two superimposed sinusoidal waves of equal amplitude and slightly different frequencies approaching a common limiting value

NOTE 1 – The magnitude of the group velocity is equal to the derivative of frequency with respect to the reciprocal of the wavelength.

NOTE 2 – In an isotropic medium the group velocity equals the phase velocity if the phase constant is a linear function of the angular frequency.

NOTE 3 – Each waveguide mode has its own particular group velocity.


Publication date:1991-10
Source:702-02-22
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