Squeezing of open boundaries by Maxwell-consistent real coordinate transformation

Dzmitry Shyroki

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    To emulate open boundaries within a finite computational domain, real-function coordinate transformation consistent with generally covariant Maxwell equations is proposed. The mapping-realized with arctangent function here-has a transparent geometric meaning of pure squeezing of coordinates, does not introduce artificially lossy layers (or "lossy coordinates") to absorb outgoing radiation, nor lead to spurious non-Maxwellian fields. In finite-difference frequency-domain calculations on staggered grid, clear superiority over perfectly matched layers is demonstrated by the proposed technique, at a lower computation cost, in drastic elimination of parasitic coupling of guided modes to the boundaries of the computational window.
    Original languageEnglish
    JournalIEEE Microwave and Wireless Components Letters
    Issue number11
    Pages (from-to)576-578
    Publication statusPublished - 2006

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