Question: A 2-cm by 3-cm waveguide is filled with a dielectric material with r = 4. If the waveguide operates at 20 GHz with TMU mode,

A 2-cm by 3-cm waveguide is filled with a dielectric material with εr = 4. If the waveguide operates at 20 GHz with TMU mode, find:

(a) Cutoff frequency,

(b) The phase constant,

(c) The phase velocity.

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