The speed of a signal within a rectangular waveguide is given by the group velocity of the associated mode (Equation \ref{m0224_eGV}). The group velocity for this mode at the frequency of interest is ...The speed of a signal within a rectangular waveguide is given by the group velocity of the associated mode (Equation \ref{m0224_eGV}). The group velocity for this mode at the frequency of interest is given by Equation \ref{m0224_eGV}. Using this equation, the speed of propagation is found to be \(\cong 2.26 \times 10^{8} \: m/s\), which is about 75.5% of \(c\).
