M-type ferrite composite as a microwave absorber with wide bandwidth in the ghz range

S. Sugimoto; S. Kondo; K. Okayama; H. Nakamura; D. Book; T. Kagotani; M. Homma

doi:10.1109/20.801112

M-type ferrite composite as a microwave absorber with wide bandwidth in the ghz range

S. Sugimoto, S. Kondo, K. Okayama, H. Nakamura, D. Book, T. Kagotani, M. Homma

ENG - Materials Science

Research output: Contribution to journal › Article › peer-review

168 Citations (Scopus)

Abstract

The electromagnetic wave absorption properties of Ba M-type (BaF_{12. 2x}. Ir_xMe_xO₁₉) ferrite - epoxy resin composites were investigated. After measuring the complex permittivities of the samples, the regions of complex permeabilities in which the reflection loss (R. L. ) becomes less than -20 dB (-20 dB Regions), were calculated. Altering the conditions such as sintering temperature, particle size and the ratio of ferrite powder in the composite samples, resulted in frequency dependencies of permeabilities that agree well with the calculated -20 dB regions, and which lead to an expansion in bandwidth (frequency range (Δf) of R. L. -20 dB). The BaFe₉(Ti_{0. 5}Mn_{0. 5})₃O₁₉ ferrite-resin composite, which was produced by sintering at 1573K for 20 h, crushing into powder (150-300 (Jin) and mixing with epoxy resin at a ratio of 70 mass%, exhibited a wide bandwidth (Af=7. 2 GHz) from 13. 75 GHz to 20. 95 GHz. Af values of 1. 4-5. 4 GHz in the frequency range 6. 35-15. 65 GHz, were obtained by changing the composition of the BeFe_12-x(Ti_{0. 5}Mn_{0. 5})_xO₁₉ epoxy resin composite from x=3. 5 to 4. 5.

Original language	English
Pages (from-to)	3154-3156
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	35
Issue number	5 PART 1
DOIs	https://doi.org/10.1109/20.801112
Publication status	Published - 1999

Keywords

Composite
Electromagnetic absorber
Impedance matching
M-type ferrite

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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title = "M-type ferrite composite as a microwave absorber with wide bandwidth in the ghz range",

abstract = "The electromagnetic wave absorption properties of Ba M-type (BaF12. 2x. IrxMexO19) ferrite - epoxy resin composites were investigated. After measuring the complex permittivities of the samples, the regions of complex permeabilities in which the reflection loss (R. L. ) becomes less than -20 dB (-20 dB Regions), were calculated. Altering the conditions such as sintering temperature, particle size and the ratio of ferrite powder in the composite samples, resulted in frequency dependencies of permeabilities that agree well with the calculated -20 dB regions, and which lead to an expansion in bandwidth (frequency range (Δf) of R. L. -20 dB). The BaFe9(Ti0. 5Mn0. 5)3O19 ferrite-resin composite, which was produced by sintering at 1573K for 20 h, crushing into powder (150-300 (Jin) and mixing with epoxy resin at a ratio of 70 mass%, exhibited a wide bandwidth (Af=7. 2 GHz) from 13. 75 GHz to 20. 95 GHz. Af values of 1. 4-5. 4 GHz in the frequency range 6. 35-15. 65 GHz, were obtained by changing the composition of the BeFe12-x(Ti0. 5Mn0. 5)xO19 epoxy resin composite from x=3. 5 to 4. 5.",

keywords = "Composite, Electromagnetic absorber, Impedance matching, M-type ferrite",

author = "S. Sugimoto and S. Kondo and K. Okayama and H. Nakamura and D. Book and T. Kagotani and M. Homma",

note = "Funding Information: Manuscript received March 3,1999. M. Homma, Tel& Fax: +81-22-217-7331. This work was partly supported by Grant-in Aid for Scientific Research (No. 09450254) from the Ministry of Educ., Sci., Sports & Culture of Japan.",

year = "1999",

doi = "10.1109/20.801112",

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volume = "35",

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T1 - M-type ferrite composite as a microwave absorber with wide bandwidth in the ghz range

AU - Sugimoto, S.

AU - Kondo, S.

AU - Okayama, K.

AU - Nakamura, H.

AU - Book, D.

AU - Kagotani, T.

AU - Homma, M.

N1 - Funding Information: Manuscript received March 3,1999. M. Homma, Tel& Fax: +81-22-217-7331. This work was partly supported by Grant-in Aid for Scientific Research (No. 09450254) from the Ministry of Educ., Sci., Sports & Culture of Japan.

PY - 1999

Y1 - 1999

N2 - The electromagnetic wave absorption properties of Ba M-type (BaF12. 2x. IrxMexO19) ferrite - epoxy resin composites were investigated. After measuring the complex permittivities of the samples, the regions of complex permeabilities in which the reflection loss (R. L. ) becomes less than -20 dB (-20 dB Regions), were calculated. Altering the conditions such as sintering temperature, particle size and the ratio of ferrite powder in the composite samples, resulted in frequency dependencies of permeabilities that agree well with the calculated -20 dB regions, and which lead to an expansion in bandwidth (frequency range (Δf) of R. L. -20 dB). The BaFe9(Ti0. 5Mn0. 5)3O19 ferrite-resin composite, which was produced by sintering at 1573K for 20 h, crushing into powder (150-300 (Jin) and mixing with epoxy resin at a ratio of 70 mass%, exhibited a wide bandwidth (Af=7. 2 GHz) from 13. 75 GHz to 20. 95 GHz. Af values of 1. 4-5. 4 GHz in the frequency range 6. 35-15. 65 GHz, were obtained by changing the composition of the BeFe12-x(Ti0. 5Mn0. 5)xO19 epoxy resin composite from x=3. 5 to 4. 5.

AB - The electromagnetic wave absorption properties of Ba M-type (BaF12. 2x. IrxMexO19) ferrite - epoxy resin composites were investigated. After measuring the complex permittivities of the samples, the regions of complex permeabilities in which the reflection loss (R. L. ) becomes less than -20 dB (-20 dB Regions), were calculated. Altering the conditions such as sintering temperature, particle size and the ratio of ferrite powder in the composite samples, resulted in frequency dependencies of permeabilities that agree well with the calculated -20 dB regions, and which lead to an expansion in bandwidth (frequency range (Δf) of R. L. -20 dB). The BaFe9(Ti0. 5Mn0. 5)3O19 ferrite-resin composite, which was produced by sintering at 1573K for 20 h, crushing into powder (150-300 (Jin) and mixing with epoxy resin at a ratio of 70 mass%, exhibited a wide bandwidth (Af=7. 2 GHz) from 13. 75 GHz to 20. 95 GHz. Af values of 1. 4-5. 4 GHz in the frequency range 6. 35-15. 65 GHz, were obtained by changing the composition of the BeFe12-x(Ti0. 5Mn0. 5)xO19 epoxy resin composite from x=3. 5 to 4. 5.

KW - Composite

KW - Electromagnetic absorber

KW - Impedance matching

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ER -

M-type ferrite composite as a microwave absorber with wide bandwidth in the ghz range

Abstract

Keywords

ASJC Scopus subject areas

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