Exact equivalent straight waveguide representation is given for a waveguide of arbitrary curvature and torsion. No assumptions regarding refractive index contrast, isotropy of materials, or particular morphology in the waveguide cross section are made. This enables rigorous full-vector modeling of in-plane curved or helically wound waveguides with use of available simulators for straight waveguides without the restrictions of the known approximate equivalent-index formulas.
|Journal||IEEE Transactions on Microwave Theory and Techniques|
|Publication status||Published - 2008|
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- equivalent straight waveguide
- coordinate transformation
- helical coordinates