skrf.media.freespace.Freespace.v_g¶
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Freespace.
v_g
¶ Complex group velocity (in m/s)
\[j \cdot d \omega / d \gamma\]where: * \(\omega\) is angular frequency (rad/s), * \(\gamma\) is complex propagation constant (rad/m)
Notes
the j is used to make propgation real, this is needed because skrf defined the gamma as gamma= alpha +jbeta.
References
https://en.wikipedia.org/wiki/Group_velocity
See also
propgation_constant
,v_p