EC > GATE 2017 SET-2 > Waveguides
Standard air-filled rectangular waveguides of dimensions a=2.29 cm and b=1.02 cm are designed for radar applications. It is desired that these waveguides operate only in the dominant TE10 mode with the operating frequency at least 25% above the cutoff frequency of the TE10 mode but not higher than 95% of the next higher cutoff frequency. The range of the allowable operating frequency f is
Correct : b
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