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Inhomogenous wave equation: Waveguiding vs radiation problems

For the guided waves (for example, the eigenmodes inside a waveguide), we usually write the (Helmholtz) wave equation in a source-free region. … My question is, why in waveguiding poblems we are working exclusively in source-free regions, ignoring any sources inside the waveguide, but in radiation problems we have to solve the inhomogenous wave …
teufel's user avatar
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3 votes
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Can a metallic rectangular waveguide support hybrid modes?

Studying the basics of guided waves in metallic rectangular waveguides, filled with homogenous dielectric material, I see that there is always a distinction between TE and TM modes. I understand that …
teufel's user avatar
  • 131