EP0485635A4 - Body for absorbing electromagnetic wave - Google Patents

Body for absorbing electromagnetic wave

Info

Publication number
EP0485635A4
EP0485635A4 EP19910911181 EP91911181A EP0485635A4 EP 0485635 A4 EP0485635 A4 EP 0485635A4 EP 19910911181 EP19910911181 EP 19910911181 EP 91911181 A EP91911181 A EP 91911181A EP 0485635 A4 EP0485635 A4 EP 0485635A4
Authority
EP
European Patent Office
Prior art keywords
electromagnetic wave
absorbing electromagnetic
absorbing
wave
electromagnetic
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.)
Withdrawn
Application number
EP19910911181
Other versions
EP0485635A1 (en
Inventor
Shigeru Ohsawa
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.)
WR Grace and Co Conn
Original Assignee
WR Grace and Co Conn
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 WR Grace and Co Conn filed Critical WR Grace and Co Conn
Publication of EP0485635A1 publication Critical patent/EP0485635A1/en
Publication of EP0485635A4 publication Critical patent/EP0485635A4/en
Withdrawn legal-status Critical Current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
    • 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
    • H01Q17/008—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems with a particular shape
EP19910911181 1990-06-12 1991-06-12 Body for absorbing electromagnetic wave Withdrawn EP0485635A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP151680/90 1990-06-12
JP15168090A JPH0444300A (en) 1990-06-12 1990-06-12 Electric wave absorber

Publications (2)

Publication Number Publication Date
EP0485635A1 EP0485635A1 (en) 1992-05-20
EP0485635A4 true EP0485635A4 (en) 1992-07-15

Family

ID=15523909

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910911181 Withdrawn EP0485635A4 (en) 1990-06-12 1991-06-12 Body for absorbing electromagnetic wave

Country Status (3)

Country Link
EP (1) EP0485635A4 (en)
JP (1) JPH0444300A (en)
WO (1) WO1991020179A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5260513A (en) * 1992-05-06 1993-11-09 University Of Massachusetts Lowell Method for absorbing radiation
US5373296A (en) * 1992-08-18 1994-12-13 Tdk Corporation Electromagnetic wave absorber and wave absorption structure
US5453745A (en) * 1992-11-30 1995-09-26 Mitsubishi Cable Industries, Ltd. Wideband wave absorber
JPH09275295A (en) * 1996-04-05 1997-10-21 Nec Corp Radio wave absorbent
JPH1187978A (en) * 1997-09-09 1999-03-30 Nitto Boseki Co Ltd Incombustible radio wave absorber
JP2000022380A (en) * 1998-06-30 2000-01-21 Riken Corp Radio wave absorber
JP4144754B2 (en) 2004-05-31 2008-09-03 Ｔｄｋ株式会社 Radio wave absorber

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1766335B1 (en) * 1958-07-05 1970-10-15 Mcmillan Edward Bellamy Microwave absorbers

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02111099A (en) * 1988-10-20 1990-04-24 Tdk Corp Electromagnetic wave absorber

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1766335B1 (en) * 1958-07-05 1970-10-15 Mcmillan Edward Bellamy Microwave absorbers

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
EDN/EEE vol. 17, no. 3, 1 February 1972, NEWTON, MASS., US page 68; 'Radiation Absorber' *
PATENT ABSTRACTS OF JAPAN vol. 14, no. 302 (E-0946)28 June 1990 *
See also references of WO9120179A1 *

Also Published As

Publication number Publication date
JPH0444300A (en) 1992-02-14
WO1991020179A1 (en) 1991-12-26
EP0485635A1 (en) 1992-05-20

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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17P Request for examination filed

Effective date: 19920211

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A4 Supplementary search report drawn up and despatched

Effective date: 19920526

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STAA Information on the status of an ep patent application or granted ep patent

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18W Application withdrawn

Withdrawal date: 19931116