JPS54121047A - Electric wave absorbing material - Google Patents

Electric wave absorbing material

Info

Publication number
JPS54121047A
JPS54121047A JP2780378A JP2780378A JPS54121047A JP S54121047 A JPS54121047 A JP S54121047A JP 2780378 A JP2780378 A JP 2780378A JP 2780378 A JP2780378 A JP 2780378A JP S54121047 A JPS54121047 A JP S54121047A
Authority
JP
Japan
Prior art keywords
powder
electric wave
wave absorbing
absorbing material
range
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.)
Pending
Application number
JP2780378A
Other languages
Japanese (ja)
Inventor
Takeshi Ishino
Hiroshi Yamashita
Kenichi Ichihara
Takashi Watanabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Corp
Original Assignee
TDK Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TDK Corp filed Critical TDK Corp
Priority to JP2780378A priority Critical patent/JPS54121047A/en
Publication of JPS54121047A publication Critical patent/JPS54121047A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H01Q17/004—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems using non-directional dissipative particles, e.g. ferrite powders

Landscapes

  • Hard Magnetic Materials (AREA)
  • Soft Magnetic Materials (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

PURPOSE:To obtain a thin electric wave absorbing material for 2-4 GHz bands by dispersing the mixture magnetic powder composed by mixing the ferrite powder and the metal iron powder with the fixed range of weight percent into the organic high-molecule material with a fixed ratio. CONSTITUTION:The mixture magnetic powder is composed by mixing the ferrite powder containing at least one kind of metal selected among the group of Mn, Ni, Mg, zinc, Co and copper with the metal iron powder in the weight percent range of 1:0.2-7.6. Such magnetic powder is then dispersed into the organic high-molecule material containing the plasticizer, the hardener and the like in the range of the cubic percent of 26-42 to the whole and then kneaded with the roller, ball mill, sand mill and others to be shaped into the coating form or the sheet form. This electric wave absorbing material is then mounted or coated on the wave reflector in the thickness of 2-3.8 mm to secure a high reflective attenuation quantity at the 2-4 GHz bands. This material features the reduced fluctuation of the absorption characteristics to the change of thickness of the material, thus ensuring the excellent coating performance as well as a high ecomonical property.
JP2780378A 1978-03-13 1978-03-13 Electric wave absorbing material Pending JPS54121047A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2780378A JPS54121047A (en) 1978-03-13 1978-03-13 Electric wave absorbing material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2780378A JPS54121047A (en) 1978-03-13 1978-03-13 Electric wave absorbing material

Publications (1)

Publication Number Publication Date
JPS54121047A true JPS54121047A (en) 1979-09-19

Family

ID=12231125

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2780378A Pending JPS54121047A (en) 1978-03-13 1978-03-13 Electric wave absorbing material

Country Status (1)

Country Link
JP (1) JPS54121047A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58112202A (en) * 1981-12-26 1983-07-04 矢崎総業株式会社 Noise preventing high voltage resistance wire
JPS61500338A (en) * 1983-11-07 1986-02-27 ザ　ダウ　ケミカル　カンパニ− Low density electromagnetic radiation absorbing composition
JPS6472925A (en) * 1987-09-14 1989-03-17 Fuji Electrochemical Co Ltd Magnesium-zinc ferrite material
JP2012508339A (en) * 2008-10-06 2012-04-05 フロデザイン ウィンド タービン コーポレーション Wind turbine with reduced radar signature

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5193146A (en) * 1975-02-13 1976-08-16

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5193146A (en) * 1975-02-13 1976-08-16

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58112202A (en) * 1981-12-26 1983-07-04 矢崎総業株式会社 Noise preventing high voltage resistance wire
JPS6223409B2 (en) * 1981-12-26 1987-05-22 Yazaki Corp
JPS61500338A (en) * 1983-11-07 1986-02-27 ザ　ダウ　ケミカル　カンパニ− Low density electromagnetic radiation absorbing composition
JPS6472925A (en) * 1987-09-14 1989-03-17 Fuji Electrochemical Co Ltd Magnesium-zinc ferrite material
JP2012508339A (en) * 2008-10-06 2012-04-05 フロデザイン ウィンド タービン コーポレーション Wind turbine with reduced radar signature

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