Experimental study of microwave properties of composites filled with Permalloy powder Stanislav Y. Bobrovskii, Victor A. Garanov, Andrei S. Naboko, Alexei V. Osipov and Konstantin N. Rozanov EPJ Web Conf., 185 (2018) 02002 Published online: 04 July 2018 DOI: 10.1051/epjconf/201818502002