JPS6467997A - Radio wave absorber containing ferrite - Google Patents
Radio wave absorber containing ferriteInfo
- Publication number
- JPS6467997A JPS6467997A JP22469387A JP22469387A JPS6467997A JP S6467997 A JPS6467997 A JP S6467997A JP 22469387 A JP22469387 A JP 22469387A JP 22469387 A JP22469387 A JP 22469387A JP S6467997 A JPS6467997 A JP S6467997A
- Authority
- JP
- Japan
- Prior art keywords
- carbon
- layer
- carbon fiber
- bead
- powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000859 α-Fe Inorganic materials 0.000 title abstract 4
- 239000006096 absorbing agent Substances 0.000 title abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 5
- 229910052799 carbon Inorganic materials 0.000 abstract 5
- 239000000843 powder Substances 0.000 abstract 5
- 229920000049 Carbon (fiber) Polymers 0.000 abstract 4
- 239000004917 carbon fiber Substances 0.000 abstract 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 4
- 239000011324 bead Substances 0.000 abstract 3
- 239000002245 particle Substances 0.000 abstract 3
- 239000011203 carbon fibre reinforced carbon Substances 0.000 abstract 2
- 239000011230 binding agent Substances 0.000 abstract 1
- 239000004568 cement Substances 0.000 abstract 1
- 239000002131 composite material Substances 0.000 abstract 1
- 239000004567 concrete Substances 0.000 abstract 1
- 238000010030 laminating Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000004576 sand Substances 0.000 abstract 1
Landscapes
- Aerials With Secondary Devices (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
PURPOSE:To obtain a composite panel which exhibits excellent absorbing effect in frequencies of wide range by laminating a layer containing carbon fiber or carbon bead in sand and cement mixture, and a layer containing ferrite powder. CONSTITUTION:In a 2-layer concrete panel, carbon fiber and carbon bead are contained in a first layer on which a metal plate is bonded on its rear face, and ferrite powder is contained in a second layer. The ferrite powder may be of powder normally sold in a market. The carbon fiber may be of normal carbon fiber, and may employ that having 5-30mum of diameter and 0.3-15mm of length. The bead employ lumped carbon formed generally by adding binder to spherical carbon particles or powder carbon having 50-1500mum of particle size and lumping it in particle size of 50-1500mum. This radio wave absorber is effective for radio waves having wavelengths of wide range, and particularly effective for radio waves for television waves, i.e., VHF, UHF bands.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62224693A JPH0834354B2 (en) | 1987-09-08 | 1987-09-08 | Radio wave absorber containing ferrite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62224693A JPH0834354B2 (en) | 1987-09-08 | 1987-09-08 | Radio wave absorber containing ferrite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6467997A true JPS6467997A (en) | 1989-03-14 |
| JPH0834354B2 JPH0834354B2 (en) | 1996-03-29 |
Family
ID=16817758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62224693A Expired - Lifetime JPH0834354B2 (en) | 1987-09-08 | 1987-09-08 | Radio wave absorber containing ferrite |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0834354B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03203396A (en) * | 1989-12-29 | 1991-09-05 | Nippon Steel Corp | Wave absorbing body for tv frequency band |
| JPH03203397A (en) * | 1989-12-29 | 1991-09-05 | Nippon Steel Corp | Wave absorbing body for tv frequency band |
| JPH0463499A (en) * | 1989-12-29 | 1992-02-28 | Nippon Steel Corp | Radio wave absorber for tv frequency band |
| US5095616A (en) * | 1990-10-26 | 1992-03-17 | Tektronix, Inc. | Grounding method for use in high frequency electrical circuitry |
| JPH04163999A (en) * | 1990-10-29 | 1992-06-09 | Tdk Corp | Radio wave absorber |
| JPH04167602A (en) * | 1990-10-29 | 1992-06-15 | Tdk Corp | Wave absorber |
| KR100730597B1 (en) * | 2005-02-23 | 2007-06-20 | 주식회사 인트켐 | Architectural ceramic panel with broadband electromagnetic wave absorption function and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5267945A (en) * | 1975-12-04 | 1977-06-06 | Tdk Corp | Electric wave absorbing wall |
| JPS6242498A (en) * | 1985-08-19 | 1987-02-24 | 日本電気株式会社 | Radio wave absorbing body |
| JPS6245100A (en) * | 1985-08-21 | 1987-02-27 | 日本電気株式会社 | Radio wave absorbing body |
-
1987
- 1987-09-08 JP JP62224693A patent/JPH0834354B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5267945A (en) * | 1975-12-04 | 1977-06-06 | Tdk Corp | Electric wave absorbing wall |
| JPS6242498A (en) * | 1985-08-19 | 1987-02-24 | 日本電気株式会社 | Radio wave absorbing body |
| JPS6245100A (en) * | 1985-08-21 | 1987-02-27 | 日本電気株式会社 | Radio wave absorbing body |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03203396A (en) * | 1989-12-29 | 1991-09-05 | Nippon Steel Corp | Wave absorbing body for tv frequency band |
| JPH03203397A (en) * | 1989-12-29 | 1991-09-05 | Nippon Steel Corp | Wave absorbing body for tv frequency band |
| JPH0463499A (en) * | 1989-12-29 | 1992-02-28 | Nippon Steel Corp | Radio wave absorber for tv frequency band |
| US5095616A (en) * | 1990-10-26 | 1992-03-17 | Tektronix, Inc. | Grounding method for use in high frequency electrical circuitry |
| JPH04163999A (en) * | 1990-10-29 | 1992-06-09 | Tdk Corp | Radio wave absorber |
| JPH04167602A (en) * | 1990-10-29 | 1992-06-15 | Tdk Corp | Wave absorber |
| KR100730597B1 (en) * | 2005-02-23 | 2007-06-20 | 주식회사 인트켐 | Architectural ceramic panel with broadband electromagnetic wave absorption function and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0834354B2 (en) | 1996-03-29 |
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