Control of magnetic loss profile for RF noise suppression sheets

Author

Yoshida, Sigeru ; Ono, Hiroshi ; Ando, Shinsuke ; Yamaguchi, Masahiro ; Shimada, Yutaka

Author_Institution

EMC Devices Div., NEC-TOKIN Corp., Sendai, Japan

Volume

2

fYear

2003

fDate

11-16 May 2003

Firstpage

962

Abstract

The ideal frequency profile of magnetic loss μ" for the magnetic composite sheets to be used as high performance RF noise suppressors is a steep rise of at the critical frequency followed by gradual decay of 1/f. We testify that the μ" profile can be improved by combining the multiple elemental dispersion of μ" and applying magnetic field. Furthermore, patterning of the sheets into a stripe array works effectively to reduce the strength of the external field because of enhancement of the shape anisotropy. Consequently μ" profile closer to that of the ideal RF noise suppressor is obtained.

Keywords

1/f noise; aluminium alloys; composite materials; eddy current losses; ferromagnetic materials; interference suppression; iron alloys; magnetic anisotropy; magnetic noise; magnetic permeability; microstrip lines; radiofrequency interference; sheet materials; silicon alloys; 1/f noise; FeSiAl; external field strength; gradual decay; high performance RF noise suppressors; ideal RF noise suppression sheets; ideal frequency profile; magnetic composite sheets; magnetic loss profile control; multiple elemental dispersion; shape anisotropy; sheets patterning; stripe array; Anisotropic magnetoresistance; Magnetic anisotropy; Magnetic fields; Magnetic losses; Magnetic noise; Performance loss; Perpendicular magnetic anisotropy; Radio frequency; Shape; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility, 2003. EMC '03. 2003 IEEE International Symposium on

Print_ISBN

0-7803-7779-6

Type

conf

DOI

10.1109/ICSMC2.2003.1429071

Filename

1429071