Spectral Analysis Of A Finite-Difference Frequency-Domain Solver Based On The Quasi-Tem Approximation
international conference on electromagnetics in advanced applications(2019)
摘要
A finite-difference frequency-domain (FDFD) solver, based on the quasi-TEM approximation, is analyzed to determine the validity of the quasi-TEM approximation as a function of frequency. A full-wave finite-difference time-domain characteristics in a transmission line structure (stripline) at frequencies in the vicinity of the lowest waveguide mode cutoff frequency. Results show that the transverse fields in the stripline are near constant over a wide range of frequencies, even at frequencies above the dominant waveguide mode cutoff frequency.
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关键词
finite-difference frequency-domain technique, quasi-TEM approximation
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