The wave impedance of a TM mode in a parallel plate waveguide is a:

A)
Function of frequency
B)
Independent of frequency
C)
Proportional to square of frequency
D)
Inversely proportional to square of frequency

Correct Answer : Option (A) :   Function of frequency

Explanation : The wave impedance of a parallel plate waveguide in TM mode is β/k which is a function of frequency. The wave impedance is real for f>fC and purely imaginary for f<fC.

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