For the dominant mode of operation in an air-filled circular waveguide of an inner diameter of 4 cm, determine the cut-off frequency?

For the dominant mode of operation in an air-filled circular waveguide

1.	For the dominant mode of operation in an air-filled circular waveguide of an inner diameter of 4 cm, determine the cut-off frequency?
A.	4.395 GHz
B.	2.196 GHz
C.	8.674 GHz
D.	1.148 GHz
Answer» B. 2.196 GHz

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For the dominant mode of operation in an air-filled circular waveguide of an inner diameter of 4 cm, determine the cut-off frequency?

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