Microwave composite structures on the base of nickel-zinc ferrite Ni1−xZnxFe2O4 nanoparticles in the photopolymer matrix

Abstract The 3D printing compatible technology of “ferrite – nonmagnetic dielectric” composite structures preparation was proposed. Composite resonant elements for applications in the centimeter range of microwave frequencies comprising nonmagnetic dielectric BaTi4O9-ZnO and ferrite film made from spinel nickel-zinc ferrite Ni1−xZnxFe2O4 (x = 0; 0.25; 0.5; 0.75; 1) magnetic nanoparticles in the photopolymer matrix were manufactured. Microwave characteristics of the obtained composite resonators with different concentrations of ferrite nanoparticles in the film-forming suspension were investigated. It was shown, that magnetic field makes the influence on the transmission characteristics of composite resonators, namely the operating frequency, resonance linewidth and the resonant absorption level. The developed elements can be used to create the various microwave devices (solid-state oscillators, microwave filters and attenuators) with the magnetic field tunable parameters.