Electronics and Communication Engineering - Exam Questions Papers - Discussion

Discussion Forum : Exam Questions Papers - Exam Paper 1 (Q.No. 40)

Exam Questions Papers

40.

An air-filled rectangular waveguide has dimensions 8cm x 10cm . The phase velocity of guided wave at frequency of 3 GHz for TE₁₀ mode is

1.5 x 10⁸ m/s

5.5 x 10⁸ m/s

3.46 x 10⁸ m/s

0.18 x 10⁷ m/s

Answer: Option

Explanation:

∴ V_P = 3.46 x 10⁸ m/s.

Discussion:

3 comments Page 1 of 1.

Indu said: 1 decade ago

Why fc is 1.5? Can someone explain?

Mani said: 10 years ago

fc = C/2sqrt((m/a)2+(n/b)2).

Ashwin said: 9 years ago

fc = c/2a for dominant mode (TE10) and greater dimension takes as a.

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