Electromagnetic...

For a wave propagating in an air-filled rectangular waveguide.

A 6 cm × 4 cm rectangular waveguide operating in TE₃₂ mode at frequency equal to √2 times the cutoff frequency. The operating frequency is: 

 For a square waveguide of cross-section 3 m × 3 m, which of the following result is/are correct?

An a × b rectangular waveguide (a > b) is operating at a frequency, f = 5 GHz. What will be its dimensions if the design frequency is 10% larger than the cutoff frequency of dominant mode while being 10% lower than the cutoff frequency for the next higher-order mode?

A square waveguide carries TE₁₁ mode whose axial magnetic field is given by \({{H}_{z}}={{H}_{0}}\cos \left( \frac{\pi x}{\sqrt{8}}~ \right)\cos \left( \frac{\pi y}{\sqrt{8}} \right)\)A/m, where wave guide dimensions are in cm. What is the cut-off frequency of the mode?

A material is characterised by σ =0, ϵ = 4ϵ₀ and μ_r = 1

A rectangular waveguide with dimensions a = 2.5 cm and b = 1 cm is to operate below 9 GHz.

An air filled rectangular wave guide with dimensions (1 × 3) cm operating at 20% higher than the cut off frequency. The waveguide section of one meter is excited at one end. The time taken for the excitation to reach the other end is