Title :
Design of broadband electromagnetic absorber using NiZn/MnZn ferrite hybrid structure
Author :
Chung, Yeon-choon ; Kim, Dong-Young ; Park, Dong-Chul
Author_Institution :
EMC Group, KRISS, Taejon, South Korea
Abstract :
The electromagnetic absorption characteristics of a hybrid absorber composed of NiZn ferrite cone arrays upon MnZn ferrite tile are described. The reflection loss for the normal incident electromagnetic wave is evaluated by considering the equivalent homogeneous multi-layered structure and the Hashin-Shtrikman formula. The absorber has a very broad absorption bandwidth in spite of its thin thickness: reflection loss of ⩽-20 dB in the frequency range from 30 MHz to 10 GHz with matching thickness of 5 cm. These characteristics are superior to those of the traditional dielectric/ferrite-tile hybrid structure
Keywords :
electromagnetic wave absorption; electromagnetic wave reflection; ferrite devices; ferrites; losses; manganese alloys; nickel alloys; zinc alloys; 30 MHz to 10 GHz; Hashin-Shtrikman formula; MnZn ferrite tile; NiZn ferrite cone arrays; NiZn-MnZn; NiZn/MnZn ferrite hybrid structure; broad absorption bandwidth; broadband electromagnetic absorber; electromagnetic absorption characteristics; equivalent homogeneous multi-layered structure; matching thickness; normal incident electromagnetic wave; reflection loss; Bandwidth; Electromagnetic compatibility; Electromagnetic reflection; Electromagnetic wave absorption; Ferrites; Frequency; Permeability; Permittivity; Testing; Tiles;
Conference_Titel :
Electromagnetic Compatibility, 1997. IEEE 1997 International Symposium on
Conference_Location :
Austin, TX
Print_ISBN :
0-7803-4140-6
DOI :
10.1109/ISEMC.1997.667714
