Modulation of dielectric properties in low-loss polypropylene-based composites at GHz frequencies: theory and experiment.

ABSTRACT: Polymer composites with high dielectric constant and low loss tangent are highly regarded as substrates for modern high-speed electronics. In this work, we analyze the high-frequency dielectric properties of two types of composites based on polypropylene infused with high-dielectric-constant microparticles. Two types of fillers are used: commercial ceramics or titanium oxide (TiO₂) with different concentrations. The key observation is that adding the fillers causes an increase of dielectric constants by around 100% (for highest loading) up to 4.2 and 3.4, for micro-ceramics and TiO₂ based composites, respectively. Interestingly, for the TiO₂ composite, the loss tangent depends on the filler loading volume, whereas the other composite has a slightly increasi

SUBMITTER: Wilczynski K 

PROVIDER: S-EPMC9338949 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature