Absorbing properties of the magnetic composite electromagnetic wave absorber

Author

Nie, Yan ; He, Huahui ; Feng, Zekun ; Xiong, Bo

Author_Institution

Dept. of Electron. Sci. & Technol., Huazhong Univ. of Sci. & Technol., Wuhan

Volume

1

fYear

2005

Firstpage

724

Abstract

Ba₃Co₂Ti_1.2Fe_22.4O ₄₁ hexagonal ferrite was obtained by conventional ceramic technology. Fe-5wt%Ni alloy was also prepared by mechanical alloying method. Electromagnetic (EM) characteristics of the two materials were measured in a frequency range of 2-18 GHz. The absorption performances of metal-backed single-layered coating and double-layered coating were numerically simulated. Results show that preferable properties of EM absorption can be obtained by the double-layered design of ferrite and Fe-Ni alloy. The minimum reflection loss is -32.96 dB and the bandwidth of -10 dB is over 7 GHz at 3 mm. Thus, it is possible to make thinner broadband EM wave absorber by adjusting input impedance of the composite materials

Keywords

barium compounds; coatings; cobalt compounds; composite materials; electromagnetic wave absorption; ferrites; microwave materials; titanium compounds; -32.96 dB; 2 to 18 GHz; Ba₃Co₂Ti_1.2Fe_22.4O ₄₁; EM absorption; Fe-Ni; absorbing properties; composite materials; double-layered coating; hexagonal ferrite; magnetic composite electromagnetic wave absorber; mechanical alloying method; metal-backed single-layered coating; Alloying; Ceramics; Coatings; Electromagnetic measurements; Electromagnetic scattering; Electromagnetic wave absorption; Ferrites; Frequency measurement; Iron; Magnetic properties;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2005. MAPE 2005. IEEE International Symposium on

Conference_Location

Beijing

Print_ISBN

0-7803-9128-4

Type

conf

DOI

10.1109/MAPE.2005.1618012

Filename

1618012