(Solution) - A rectangular brass c 1 37 X 107 S m waveguide with -(2025 Original AI-Free Solution)

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A rectangular brass (?c = 1.37 X 107 S/m) waveguide with dimensions ? = 2.25 cm and b = 1.5 cm operates in the dominant mode at frequency 5 GHz. If the waveguide is filled with teflon (?r = 1, ?r = 2.11, ? = 0), determine:
(a) The cutoff frequency for the dominant mode,
(b) The attenuation constant due to the loss in the guide walls.