A hollow rectangular waveguide has dimensions a = 2b. Calculate the amount of attenuation, if the frequency is 3 GHz, and b = 1 cm.

• 49
• 47.33
• 50.33
• 50

Correct Answer: 47.33

Explanation:

Since, wave is attenuated hence β = 0

and Take, dominant mode m = 1,

n = 0

.