GATE EC 2015 Set 2 — Question 63
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Electromagnetics → Waveguides & Optical Fibers → Cutoff Frequency & Guide Wavelength
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Question
An air-filled rectangular waveguide of internal dimensions () has a cutoff frequency of for the dominant mode. For the same waveguide, if the cutoff frequency of the mode is , the cutoff frequency of the mode in GHz is ______.
Correct answer
13.5 to 13.8
Solution
The cutoff frequency for a rectangular waveguide mode is given by:
1.For the dominant mode ():
2.For the mode ():
3.Substituting the value from step 1 into step 2:
4.The cutoff frequency for the mode () is:
The range provided is 13.5 to 13.8 GHz.Continue learning with Success Tracker
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