Question

1. It is desired to design a rectangular waveguide that propagates only the lowest order mode TE10 and operates at 10 GHz. If the waveguide is air filled, determine the waveguide dimensions (a and b) such that the desired operating frequency is 38% above the cutoff frequency of the TE10 mode. Although the dimension b of waveguide is often taken as b=a/2, for attenuation considerations and also to improve the waveguide power handling capacity, it is desired to design a wave guide with the largest possible value of b. Furthermore, to avoid mode degeneracy, b should be chosen such that, ba/2. Determine the dimensions and simulate the waveguide using HFSS. Your dimensions must satisfy the requirements above. (There is not just one correct answer...)

2. Now, you want to make sure that the first 4 modes propagate. So, change the dimensions from part 1 above to make sure these modes all propagate.

a. Determine the first 4 modes;

Answer 1