For a WR 90 waveguide, the cut-off frequency for TE20 mode is 16 GHz. Then the cut-off frequency for TE11 mode will be:

For a WR 90 waveguide, the cut-off frequency for TE20 mode is 16 GHz.

1.	For a WR 90 waveguide, the cut-off frequency for TE20 mode is 16 GHz. Then the cut-off frequency for TE11 mode will be:
A.	4√3 GHz
B.	6√3 GHz
C.	8√5 GHz
D.	16√5 GHz
Answer» D. 16√5 GHz

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For a WR 90 waveguide, the cut-off frequency for TE20 mode is 16 GHz. Then the cut-off frequency for TE11 mode will be:

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