Millimeter wave absorber using M-type hexagonal ferrite

Author

Iijima, Yasushi ; Houjou, Yuji ; Sato, Risaburo

Author_Institution

Electromagnetic Compatibility Res. Labs. Co. Ltd., Sendai, Japan

Volume

2

fYear

2000

fDate

2000

Firstpage

547

Abstract

Millimeter wave absorption properties of M-type hexagonal ferrite SrFe_12-xAl_xO₁₉ composites have been investigated. The complex permittivity and permeability of the materials were measured by a free space method. When ferric ion was partially substituted by aluminum ion, the ferromagnetic resonance frequency moved up from 52 GHz to 83 GHz, corresponding to the increase of substitution amount: x=0 to 2. The result of material constant measurement was applied to the design of the impedance matched wave absorbers, and it was found that thin sheet absorbers for the V-band are possible using M-type hexagonal ferrite composites

Keywords

composite materials; electromagnetic wave absorption; ferrites; ferromagnetic resonance; impedance matching; permeability; permittivity measurement; polymers; 52 GHz; 83 GHz; M-type hexagonal ferrite composites; V-band; aluminum ion; complex permeability; complex permittivity; ferric ion; ferromagnetic resonance frequency; free space method; impedance matched wave absorbers; material constant measurement; millimeter wave absorber; millimeter wave absorption properties; resin; substitution amount; thin sheet absorbers; Absorption; Aluminum; Extraterrestrial measurements; Ferrites; Magnetic resonance; Millimeter wave measurements; Millimeter wave technology; Permeability measurement; Permittivity measurement; Resonant frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility, 2000. IEEE International Symposium on

Conference_Location

Washington, DC

Print_ISBN

0-7803-5677-2

Type

conf

DOI

10.1109/ISEMC.2000.874679

Filename

874679