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Unformatted text preview: characterized by = 0, = 4 , = 1 ? (b) Calculate the cutoff frequencies of the modes. (c) Write the general instantaneous field expressions for the TM and TE modes. (d) Deduce those for TE 01 and TM 12 modes. [40 points] 5. The inner dimensions of an air-filled K u-band (12 18 GHz) WR-62 rectangular waveguide are a = 1.58 cm and b = 0.79 cm. (a) Determine the cutoff frequencies of the five lowest-order modes that can propagate in the guide. (b) Which modes propagate in the K u-band? (c) Determine the phase velocity and the guide wavelength for the TE 10 mode at 15 GHz. [20 points]...
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- Fall '10