For TM2 mode, if the distance between two parallel plates of a waveguide are 40 mm, then the cut off wavelength for TM2 mode is: - Microwave Communication

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

For TM2 mode, if the distance between two parallel plates of a waveguide are 40 mm, then the cut off wavelength for TM2 mode is:

A)

20 mm

B)

40 mm

C)

60 mm

D)

80 mm

Correct Answer : Option (B) : 40 mm

Explanation : The cutoff wavelength of a TMn mode in a parallel plate waveguide is 2d/n, where d is the distance between the plates and n signifies the mode of operation. For the given condition, substituting the given values, cut off wavelength is 40 mm.

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