Consider the equations for a symmetric waveguide. If the permittivity of one layer becomes complex, do the transverse and longitudinal wavevectors remain real? Do some of all of the transverse and longitudinal wavevectors become complex? Explain your reasoning. Does your answer change if the waveguide is asymmetrical? Or if the waveguide has many more than 3 layers?

Consider the equations for a symmetric waveguide. If the permittivity of one layer becomes complex, do the transverse and longitudinal wavevectors remain real? Do some of all of the transverse and longitudinal wavevectors become complex? Explain your reasoning. Does your answer change if the waveguide is asymmetrical? Or if the waveguide has many more than 3 layers?

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Question

Consider the equations for a symmetric waveguide. If the permittivity of one layer becomes complex, do the transverse and longitudinal wavevectors remain real? Do some of all of the transverse and longitudinal wavevectors become complex? Explain your reasoning. Does your answer change if the waveguide is asymmetrical? Or if the waveguide has many more than 3 layers?

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