Title :
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
Abstract :
Ba3Co2Ti1.2Fe22.4O 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; Ba3Co2Ti1.2Fe22.4O 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;
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
DOI :
10.1109/MAPE.2005.1618012
