Analysis of dispersion and series gap discontinuity in shielded suspended striplines with substrate mounting grooves

作者: Lin-Kun Wu , Horng-Ming Chang

DOI: 10.1109/22.120100

关键词: Transmission lineDiscontinuity (linguistics)Classification of discontinuitiesEquivalent circuitDielectricOpticsDispersion (optics)MicrostripMaterials scienceSTRIPS

摘要: Dispersion and series gap discontinuity of shielded suspended striplines (SSLs) on Duroid substrate ( epsilon /sub r/=2.22) are analyzed using the finite-difference time-domain method (FD-TD). Numerical accuracy better than 0.15% is achieved when FD-TD used to calculate effective dielectric constant reff/) an air-filled rectangular coaxial transmission line. Data obtained for frequency-dependent reff/ uniform SSLs both scattering equivalent circuit parameters various discontinuities presented. In general, presence sidewall mounting grooves causes a nearly frequency-independent small reduction in reff/. On other hand, proximity effects housing found be more important. For discontinuity, coupling across stronger wider strips and/or narrower width. Irregular behavior also strip wide enough interact strongly with sidewalls. >

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