Ku-band High-power Nizn Microwave Ferrite Material Properties And Simulation Applications

High power is the important properties of microwave ferrite's research all the time.High power microwave ferrite materials must have low ferromagnetic resonance linewidthΔH and dielectric loss tgδε,low temperature coefficient of saturation magnetizationαM or high Curie temperature Tc,high power threshold hc or spinwave linewidthΔHk.Kepping spinel NiZn ferrite which has these features as our object, we did much research in Ku band high power microwave ferrite meterials'function and affect factors to make high power and lower loss.Ni1-y+x-zZnySnxCozFe2-2xO4(x=0⁰.2,y=0⁰.4,z=0⁰.035)was prepared by traditional ceramic processing,and the dependence of ferrite material properties on the substitution content was analyzed.1.The experiment results showed that,with increasing Sn4+ content,Ms and Tc go down with x.ForΔH,it decreases fistly and then increases with a minimum value at x=0.1.The contribution of anisotropy pore-inducedΔHp and linewidthΔHa toΔH was analyzed,coming to a conclusion that the first increase and then decrease ofΔH results from anisotropyΔHa.2.Zn²⁺-substituted Ni ferrite showed that,with increasing Zn²⁺ content, Ms increases, Tc andΔH go down with y.Zn²⁺-substituted makes lower loss,but it makes worse temperature stability.3.The primary function of the Co²⁺-substituted is to increaseΔHk. The experiment results showed that small quantities of Co dramatically increaseΔHk.ForΔH,it decreases fistly and then increases with a minimum value at z=0.02. Co²⁺has little effect on Ms and Tc.4.Learning the influence that the Fe2O3 powder granularity makes in material preparation technology.And analyzing the Fe2O3 powder granularity impacts prefiring temperature, secondary milling time and firing temperature.5.High power microwave ferrite meterials used in Ku band high power devices, and got the equipment function simulation results and experiment test conclusion.