6533b856fe1ef96bd12b2f31
RESEARCH PRODUCT
FDTD characterization of evanescent modes-multimode analysis of waveguide discontinuities
T.m. BordalloEnrique A. NavarroJ. Navasquillo-mirallessubject
RadiationMulti-mode optical fiberbusiness.industryFinite-difference time-domain methodPhysics::OpticsCondensed Matter PhysicsDiscontinuity (linguistics)S-matrix theoryOpticsTransmission (telecommunications)Dispersion (optics)Reflection (physics)Waveguide (acoustics)Electrical and Electronic EngineeringbusinessMathematicsdescription
In this paper, a finite-difference time-domain numerical dispersion relation for evanescent waves is derived, and its impact on the modeling accuracy is studied. The numerical evanescent constant is found to differ from the analytical one. As a result, a correction must be used to compute discontinuity parameters. This influences the reference plane chosen for the analysis of propagating modes. Moreover, on calculating multimode transmission and reflection coefficients, the dispersion for evanescent higher order modes is determinant. The dispersive relation is derived, discussed, and used to correct the evanescent constants for the multimode analysis of a waveguide discontinuity.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-04-01 | IEEE Transactions on Microwave Theory and Techniques |