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

fYear

1997

fDate

18-22 Aug 1997

Firstpage

409

Lastpage

412

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility, 1997. IEEE 1997 International Symposium on

Conference_Location

Austin, TX

Print_ISBN

0-7803-4140-6

Type

conf

DOI

10.1109/ISEMC.1997.667714

Filename

667714