BMFO-PVDF electrospun fiber based tunable metamaterial structures for electromagnetic interference shielding in microwave frequency regionVenkatachalam Revathi, Sakthivel Dinesh Kumar, Venkatachalam Subramanian and Muthamizhchelvan ChellamuthuEur. Phys. J. Appl. Phys., 72 2 (2015) 20402DOI: https://doi.org/10.1051/epjap/2015150368