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Efficient mode-matching analysis of discontinuities in finite planar substrates using perfectly matched layers

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4 Author(s)
Derudder, H. ; Dept. of Inf. Technol., Ghent Univ., Belgium ; Olyslager, F. ; De Zutter, D. ; Van den Berghe, S.

A new method to determine the reflection of substrate modes in finite substrate planar circuits is proposed. The perfectly matched layer (PML) concept is used to transform the open problem into a closed one. The discrete set of substrate, evanescent, and Berenger modes of the resulting anisotropic waveguides are then used in a mode-matching scheme to deduce the scattering coefficients of the substrate modes for oblique incidence on the edge of the substrate. We show results for single- and double-layered substrates and compare with finite-difference time-domain (FDTD) results. The combined perfectly matched layer (PML) mode-matching technique turns out to be very efficient

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Antennas and Propagation, IEEE Transactions on  (Volume:49 ,  Issue: 2 )