Field and Wave Electromagnetics 2nd Edition by David Cheng

Exercise 14

Calculate and list in ascending order the cutoff frequencies (in terms of the cutoff frequency of the dominant mode) of an a × b rectangular waveguide for the following modes: TE 01 , TE 10 , TE 11 , TE 02 , TE 20 , TM 11 , TM 12 , and TM 22 (a) if a = 2 b , and (b) if a = b.