Title :
A study on the behavior of laminated electromagnetic wave absorber
Author :
Kim, Kyung-Yong ; Kim, Wang-Sup ; Hong, Sung-yong
Author_Institution :
Korea Adv. Inst. of Sc. & Technol., Seoul, South Korea
fDate :
7/1/1993 12:00:00 AM
Abstract :
Since ferrites are electromagnetic wave absorbing materials of composition-dependent resonance type, useful frequency ranges are typically narrow. In the present study, laminated electromagnetic wave absorbers composed of ferrite-ferrite or ferrite-dielectric layers were constructed to improve electromagnetic wave absorbing properties. When ferrites of different composition and thickness were layered, center frequency of the laminated ferrite could be changed over a range of values lying between the center frequencies of each ferrite. Compared with monolithic ferrites, ferrite-dielectric laminates exhibited broader frequency ranges with 20 dB or more attenuation
Keywords :
electromagnetic wave absorption; ferrites; magnetic multilayers; magnetic thin film devices; 20 dB; attenuation; ferrite-dielectric layers; ferrite-ferrite laminates; laminated electromagnetic wave absorber; Attenuation; Dielectric losses; Electromagnetic interference; Electromagnetic scattering; Ferrites; Frequency; Impedance; Lamination; Permittivity measurement; Resonance;
Journal_Title :
Magnetics, IEEE Transactions on
