EMI suppression effects of a magnetic composite sheet with an internal conductive layer

Author

Awakura, Yoshio ; Ono, Hiroshi ; Yoshida, Shigeyoshi

Author_Institution

Res. & Dev. Unit, Tokin Corp., Japan

fYear

1999

fDate

1999

Firstpage

790

Abstract

With continuing development in the field of digital high-frequency devices, the problems of EMI in the quasi-microwave band are becoming increasingly serious. The authors have previously proposed a noise suppressing sheet made of soft magnetic metal flakes, and its efficacy as a countermeasure for high frequency noise has been confirmed. This sheet is already in practical use in cellular-phones and notebook PCs, installed near radiation sources. This paper describes EMI suppression effects achieved with the use of a new EMI suppression sheet with an internal conductive layer, designed for use in interference suppression between printed circuit boards

Keywords

conducting materials; electromagnetic interference; interference suppression; soft magnetic materials; EMI suppression effects; cellular-phones; digital high-frequency devices; high frequency noise countermeasure; interference suppression; internal conductive layer; magnetic composite sheet; noise suppressing sheet; notebook PC; printed circuit boards; quasi-microwave band; radiation sources; soft magnetic metal flakes; soft magnetic sheets; Attenuation; Coupling circuits; Crosstalk; Electromagnetic interference; Frequency; Magnetic field measurement; Magnetic noise; Printed circuits; Soft magnetic materials; Surface resistance;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility, 1999 International Symposium on

Conference_Location

Tokyo

Print_ISBN

4-9980748-4-9

Type

conf

DOI

10.1109/ELMAGC.1999.801449

Filename

801449