Group velocity in a waveguide

Elements of vector calculus: divergence and curl; Gauss’ and Stokes’ theorems, Maxwell’s equations: differential and integral forms. Wave equation, Poynting vector. Plane waves: propagation through various media; reflection and refraction; phase and group velocity; skin depth. Transmission lines: characteristic impedance; impedance transformation; Smith chart; impedance matching; S parameters, pulse excitation. Waveguides: modes in rectangular waveguides; boundary conditions; cut-off frequencies; dispersion relations. Basics of propagation in dielectric waveguide and optical fibers. Basics of Antennas: Dipole antennas; radiation pattern; antenna gain.

Group velocity in a waveguide

Postby abhsiek » Wed Nov 06, 2013 12:57 pm

Why group velocity in a waveguide decreases with decrease in frequency?
Also why angle of incidence on the 'b' wall of a waveguide increases with increase in frequency?Image
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