Microwave attenuation properties of W-type barium ferrite BaZn2−xCoxFe16O27 composites

摘要: The complex permeability and permittivity, the relationship between dynamic static properties, attenuation properties have been studied for BaZn2−xCoxFe16O27 composites with x=0.7–2.0. results show that resonance frequency fR is controlled by out-of-plane anisotropy field Hθ, μ0′ related to in-plane Hφ. For appropriate high permeability, percentage bandwidths of ΔW=Δf/f0>90% 10 dB or more can be achieved x=0.7 1.0. Therefore, W-type barium ferrites easy c-plane are good candidates electromagnetic materials low reflectivity over broad range at microwaves.