Abstract
We present computational and theoretical assessments on the effective dielectric properties of the nonlinear composites comprised of ferroelectric ceramic inclusions (barium strontium titanate (BST)) and/or ferromagnetic inclusions (nickel zinc ferrite (NZF)) in a linear host to serve as materials for nonlinear transmission lines (NLTLs). We compare classical effective medium theories (EMTs) and computational models using CST Microwave Studio (CST MWS) to predict the dielectric and magnetic properties of the composites in the linear region to measurements. The composite models in CST MWS agree well with measurements and the Lichtenecker rule for NZF composites, while classical EMTs generally fail to estimate effective properties for the cases with high volume loadings and strong dielectric contrast.
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