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A study on the behavior of laminated electromagnetic wave absorber

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3 Author(s)
Kyung-Youg Kim ; Korea Adv. Inst. of Sc. & Technol., Seoul, South Korea ; Wang-Sup Kim ; Sung-Youg Hong

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

Published in:

IEEE Transactions on Magnetics  (Volume:29 ,  Issue: 4 )