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High-Frequency Properties and Attenuation Characteristics of WBa Hexaferrite Composites With Doping of Various Oxides

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4 Author(s)
Li, Z.W. ; Temasek Labs., Nat. Univ. of Singapore, Singapore ; Lin, G.Q. ; Wu, Y.P ; Kong, L.B.

Doping of various oxides can greatly modify the high-frequency magnetic and dielectric properties and, therefore, significantly influence the impedance matching and bandwidth characteristics of BaCoZnFe16O27 ferrite/epoxy composites. The experiments show that composites doped with V 2O 5 and IrO 2+V 2O 5 are potential candidates for use as EM attenuation materials with low reflectivity and broad bandwidth at S, C, and X microwave bands. The frequency bands for reflectivity |R| les -10 dB cover 3.6 - 13.7 GHz and 3.0 - 11.6 GHz at the thickness of 0.3 and 0.35 cm, and the relative bandwidth WR = 3.8 and 3.9 is achieved, respectively, for composites doped with V2O5 and IrO2+V 2O 5.

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Magnetics, IEEE Transactions on  (Volume:45 ,  Issue: 2 )