Question: A microwave transmitter is connected by an air-filled waveguide of cross section 2.5 cm X 1 cm to an antenna. For transmission at 11 GHz,

A microwave transmitter is connected by an air-filled waveguide of cross section 2.5 cm X 1 cm to an antenna. For transmission at 11 GHz, find the ratio of
(a) The phase velocity to the medium velocity, and
(b) The group velocity to the medium velocity.

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