Communications: directive radio wave systems and devices (e.g. – Radio wave absorber
Patent
1992-07-16
1994-06-21
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Radio wave absorber
342 3, 342 4, H01Q 1700
Patent
active
053231600
ABSTRACT:
Ferrites as an electromagnetic wave absorber have their unique attenuation ranges depending on their compositions. The possibility of controlling attenuation characteristics of ferrite absorber by forming laminates of ferrite is disclosed. This invention provides that the center frequency of laminated ferrites could be changed arbitrarily employing ferrite with different composition and thickness. The method consists of stacking at least two soft ferrite layers (Ni-Zn, Mn-Zn) with various thickness.
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H. Yamashita, et al.; Electromagnetic Wave Absorbing Wall for TV Ghost Suppression; Jap. J. Elec. Comm.; vol. J61-B, No. 8, pp. 729-736 [No Translation].
Jung Hyung J.
Kim Kyung Y.
Kim Wang S.
Song Hue S.
Korea Institute of Science and Technology
Sotomayor John B.
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