Broadband wave absorption apparatus
First Claim
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1. A broadband electromagnetic wave absorbing apparatus comprising:
- successive layers of a first dielectric body, a sintered ferrite magnetic body, a second dielectric body having a low permittivity, and a magnetic body having a low magnetic permeability overlapped on a flat reflector plate, said first dielectric being disposed between said reflector plate and said sintered ferrite magnetic body, and where the relationship between the magnetic permeability μ
1 of said sintered ferrite magnetic body and the magnetic permeability of μ
2 of said magnetic body having a low magnetic permeability is μ
1≧
25·
μ
2.
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Abstract
The provision of of an electromagnetic wave absorbing apparatus having a broadband electromagnetic wave absorbing characteristic, and which can also be used for the improvement of existing electromagnetic wave absorbing apparatus. Successive layers of an sintered ferrite magnetic body (F), a dielectric body (D) having a low permittivity, and a magnetic body (RF) having a low magnetic permeability, are overlapped on a flat reflector plate, and the relationship between the magnetic permeability μ1 of the sintered ferrite magnetic body and the magnetic permeability of the magnetic body having a low magnetic permeability is μ1≧25·μ2.
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Citations
2 Claims
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1. A broadband electromagnetic wave absorbing apparatus comprising:
successive layers of a first dielectric body, a sintered ferrite magnetic body, a second dielectric body having a low permittivity, and a magnetic body having a low magnetic permeability overlapped on a flat reflector plate, said first dielectric being disposed between said reflector plate and said sintered ferrite magnetic body, and where the relationship between the magnetic permeability μ
1 of said sintered ferrite magnetic body and the magnetic permeability of μ
2 of said magnetic body having a low magnetic permeability is μ
1≧
25·
μ
2.- View Dependent Claims (2)
Specification
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Current AssigneeMichiharu Takahashi, Yoshiyuki Naito
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Original AssigneeMichiharu Takahashi, Yoshiyuki Naito
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InventorsMizumoto, Tetsuya, Takahashi, Michiharu, Naito, Yoshiyuki
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Primary Examiner(s)Sotomayor, John B.
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Application NumberUS07/890,632Time in Patent Office663 DaysField of Search342/1, 342/2, 342/3, 342/4US Class Current342/1CPC Class CodesH01Q 17/00 Devices for absorbing waves...
