Low-Loss Composite Material Containing Fine Zn–Ni–Fe Flakes for High-Frequency Applications

Author

Shirakata, Yasushi ; Hidaka, Nobuhiro ; Ishitsuka, Masayuki ; Teramoto, Akinobu ; Ohmi, Tadahiro

Author_Institution

New Ind. Creation Hatchery Center, Tohoku Univ., Sendai, Japan

Volume

45

Issue

10

fYear

2009

Firstpage

4337

Lastpage

4340

Abstract

A low-loss magnetic composite material consisting of Zn₅Ni₇₅Fe₂₀ fine flakes dispersed in a polymer has been developed for miniaturization and performance improvement of high-frequency devices. Fine flakes are produced by a new mixing procedure that prevents cohesion of particles, thereby enhancing the dispersibility of the particles. The complex relative permeabilities of the developed material are mu\´ = 2.4, mu" = 0.09, and tan deltamu( = mu"/ mu\´) = 0.04 at 1 GHz. The low-loss properties of the developed magnetic composite material are confirmed by measured and simulated results of the basic characteristics of a small helical antenna loaded with the developed material.

Keywords

filled polymers; helical antennas; iron alloys; magnetic leakage; magnetic permeability; mixing; nickel alloys; zinc alloys; Zn₅Ni₇₅Fe₂₀; cohesion; complex relative permeabilities; fine flakes; frequency 1 GHz; helical antenna; high-frequency devices; low-loss magnetic composite material; mixing; polymer; Antennas; high frequency; magnetic loss; permeability;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2009.2022405

Filename

5257350