A parallel plate waveguide consists of two parallel, infinite perfectly conducting plates separated by a distance a. Write down expressions for the electric and magnetic fields for the TEn and TMn modes (note we only have one subscript). What are the wavenumbers of these modes and what are their cutoff wavelengths in terms of a and n. Can this guide support a TEM mode? If so, write down the electric and magnetic fields for this mode.

explanation:

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