Which of the following statement regarding waveguides is incorrect?

Question

Options:

A . At waveguide can be coupled to a coaxial cable

B . At frequencies below the cut off value the wave progresses across the waveguide after total reflections

C . Waveguides are usually air filled hollow conducting metallic tubes for transmitting UHF and microwaves

D . Waveguides can handle large power at UHF and microwaves

Answer: Option A

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