Complex permeability and permittivity and microwave absorption of ferrite-rubber composite at X-band frequencies

Author

Kim, S.S. ; Jo, S.B. ; Gueon, K.I. ; Choi, K.K. ; Kim, J.M. ; Churn, K.S.

Author_Institution

Agency for Defense Dev., Taejon, South Korea

Volume

27

Issue

6

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

5462

Lastpage

5464

Abstract

The complex permeability (μ_r) and permittivity (ε_r) spectra at X-band frequencies and their relationship with microwave absorbing properties are investigated in ferrite-rubber composite material. Multifrequency measurements of μ _r and ε_r are made by the reflection/transmission technique. The theoretical determination of matching frequency and matching thickness and minimum reflection loss can be made by plotting the observed μ_r and ε_r spectra on the solution map of wave-impedance-matching. It is found that a proper combination of μ_r and ε_r is necessary to produce the zero-reflection absorber at a given frequency and thickness

Keywords

electromagnetic wave absorption; ferrites; filled polymers; impedance matching; magnetic permeability; permittivity; rubber; X-band frequencies; complex permeability; ferrite-rubber composite; matching thickness; microwave absorption; minimum reflection loss; permittivity spectra; reflection/transmission technique; wave-impedance-matching; zero-reflection absorber; Composite materials; Conducting materials; Electromagnetic wave absorption; Ferrites; Frequency; Magnetic materials; Permeability; Permittivity measurement; Reflection; Rubber;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.278872

Filename

278872