In a parallel plate waveguide, for a propagating mode, the value of Î² is:

Electronics and Communication Engineering (ECE) : Microwave Communication - Quiz(MCQ)

Complex

Real

Imaginary

Can Not Say

Correct Answer : Option (B) : Real

Explanation : The phase velocity and guide wavelength for a parallel plate waveguide are defined only for propagating modes. Propagating modes are those modes for which β are always positive. Hence β is always real for a parallel plate waveguide.

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