Question

Given a waveguide with a non-perfectly conducting parallel metal plates spaced 3 cm apart and filled with air. Show that for the TM1 mode, the attenuation is min when the operating frequency f is equal to square(3) f where fc is the cutoff frequency of the mode.

Answer #1

Thanks you.

Given a waveguide with non-perfectly conducting
parallel metal plates spaced 3 cm apart and filled with air. Shows
that for the TM1 mode, the attenuation is minimal when the
operating frequency is equal to square(3)fc where fc is the cutoff
frequency of the mode.
I know that we have to do a différential, but I'm not
sure how.

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