JP7847546B2 - 電波吸収体、および電波吸収装置 - Google Patents

電波吸収体、および電波吸収装置

Info

Publication number
JP7847546B2
JP7847546B2 JP2022579588A JP2022579588A JP7847546B2 JP 7847546 B2 JP7847546 B2 JP 7847546B2 JP 2022579588 A JP2022579588 A JP 2022579588A JP 2022579588 A JP2022579588 A JP 2022579588A JP 7847546 B2 JP7847546 B2 JP 7847546B2
Authority
JP
Japan
Prior art keywords
radio wave
wave absorber
radio
absorber
wave absorbing
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.)
Active
Application number
JP2022579588A
Other languages
English (en)
Japanese (ja)
Other versions
JPWO2022168885A1 (https=
JPWO2022168885A5 (https=
Inventor
俊雄 廣井
敦 畠山
涼平 藤田
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.)
Maxell Ltd
Original Assignee
Maxell Ltd
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 Maxell Ltd filed Critical Maxell Ltd
Publication of JPWO2022168885A1 publication Critical patent/JPWO2022168885A1/ja
Publication of JPWO2022168885A5 publication Critical patent/JPWO2022168885A5/ja
Application granted granted Critical
Publication of JP7847546B2 publication Critical patent/JP7847546B2/ja
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/045—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/342—Oxides
    • H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
    • H01F1/348—Hexaferrites with decreased hardness or anisotropy, i.e. with increased permeability in the microwave (GHz) range, e.g. having a hexagonal crystallographic structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/36—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
    • H01F1/37—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles in a bonding agent
    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • H05K9/0083—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising electro-conductive non-fibrous particles embedded in an electrically insulating supporting structure, e.g. powder, flakes, whiskers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/102—Oxide or hydroxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/107—Ceramic
    • B32B2264/108—Carbon, e.g. graphite particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/208—Magnetic, paramagnetic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B32B2307/737—Dimensions, e.g. volume or area
    • B32B2307/7375—Linear, e.g. length, distance or width
    • B32B2307/7376—Thickness
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/10—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
    • H01F1/11—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
    • H01F1/113—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles in a bonding agent

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Dispersion Chemistry (AREA)
  • Power Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
JP2022579588A 2021-02-04 2022-02-02 電波吸収体、および電波吸収装置 Active JP7847546B2 (ja)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2021016906 2021-02-04
JP2021016906 2021-02-04
JP2021149155 2021-09-14
JP2021149155 2021-09-14
PCT/JP2022/004120 WO2022168885A1 (ja) 2021-02-04 2022-02-02 電波吸収体、および電波吸収装置

Publications (3)

Publication Number Publication Date
JPWO2022168885A1 JPWO2022168885A1 (https=) 2022-08-11
JPWO2022168885A5 JPWO2022168885A5 (https=) 2023-10-31
JP7847546B2 true JP7847546B2 (ja) 2026-04-17

Family

ID=82741535

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2022579588A Active JP7847546B2 (ja) 2021-02-04 2022-02-02 電波吸収体、および電波吸収装置

Country Status (4)

Country Link
US (1) US20250331141A1 (https=)
EP (1) EP4290995A4 (https=)
JP (1) JP7847546B2 (https=)
WO (1) WO2022168885A1 (https=)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025028488A1 (ja) * 2023-08-03 2025-02-06 マクセル株式会社 電磁波吸収体
TWI860187B (zh) * 2023-11-30 2024-10-21 大陸商宏啟勝精密電子（秦皇島）有限公司 耐彎折電路板及其製備方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004003259A (ja) 2001-08-31 2004-01-08 Tdk Corp 電波音波吸収体、電波音波吸収パネル、電波吸収防音壁、道路付帯設備ならびに電波および音波の反射抑制方法
JP2005109095A (ja) 2003-09-30 2005-04-21 Tdk Corp 不要電波抑制構造及び電波吸収仕切壁
JP2009239211A (ja) 2008-03-28 2009-10-15 Mitsubishi Cable Ind Ltd 電波吸収シートおよびその設置方法
WO2019235364A1 (ja) 2018-06-06 2019-12-12 国立大学法人 東京大学 電波吸収積層フィルム、その製造方法、及びそれを含む素子

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0312500U (https=) * 1989-06-22 1991-02-07
JPH0314294U (https=) * 1989-06-27 1991-02-13
JP4787978B2 (ja) 2006-09-01 2011-10-05 国立大学法人 東京大学 電波吸収性磁性結晶および電波吸収体
JP6616653B2 (ja) 2014-12-03 2019-12-04 国立大学法人 東京大学 電磁波吸収体及び膜形成用ペースト
EP3478046A4 (en) * 2016-06-22 2020-02-19 Maxell Holdings, Ltd. ELECTRIC WAVE ABSORBING FILM
JP6454445B2 (ja) 2016-11-04 2019-01-16 マクセルホールディングス株式会社 電磁波吸収シート
EP3606309B1 (en) * 2017-03-30 2023-09-06 FUJIFILM Corporation Electromagnetic wave absorber and method for producing electromagnetic wave absorber
US11804659B2 (en) * 2017-07-20 2023-10-31 Maxell, Ltd. Electromagnetic wave absorbing composition, and electromagnetic wave absorption body

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004003259A (ja) 2001-08-31 2004-01-08 Tdk Corp 電波音波吸収体、電波音波吸収パネル、電波吸収防音壁、道路付帯設備ならびに電波および音波の反射抑制方法
JP2005109095A (ja) 2003-09-30 2005-04-21 Tdk Corp 不要電波抑制構造及び電波吸収仕切壁
JP2009239211A (ja) 2008-03-28 2009-10-15 Mitsubishi Cable Ind Ltd 電波吸収シートおよびその設置方法
WO2019235364A1 (ja) 2018-06-06 2019-12-12 国立大学法人 東京大学 電波吸収積層フィルム、その製造方法、及びそれを含む素子

Also Published As

Publication number Publication date
EP4290995A1 (en) 2023-12-13
EP4290995A4 (en) 2025-01-01
JPWO2022168885A1 (https=) 2022-08-11
WO2022168885A1 (ja) 2022-08-11
US20250331141A1 (en) 2025-10-23

Similar Documents

Publication Publication Date Title
US11766854B2 (en) Composite material for shielding electromagnetic radiation, raw material for additive manufacturing methods and a product comprising the composite material, as well as a method of manufacturing the product
JP6764465B2 (ja) 電波吸収シート
EP3657922B1 (en) Electromagnetic wave absorbing composition, and electromagnetic wave absorption body
KR101528667B1 (ko) 전자파 흡수체
JP7030694B2 (ja) 電磁波吸収体
JP7847546B2 (ja) 電波吸収体、および電波吸収装置
US20200008328A1 (en) Electromagnetic-wave absorbing sheet
EP2928277B1 (en) Electromagnetic wave blocking material and layered body for electromagnetic wave blocking
JP2019071426A (ja) 電磁波吸収シート
KR101420059B1 (ko) 전자파 흡수체
JP7751708B2 (ja) 電磁波吸収体
JP2006114877A (ja) 電磁波吸収シート、電磁波吸収シート積層体及びそれらを用いた電磁波吸収性ハウジング
JP2018056492A (ja) 電波吸収シート
JPWO2022168885A5 (https=)
CN111133848A (zh) 电磁波吸收体用组合物和电磁波吸收体
JPWO2019235539A1 (ja) 電磁波吸収体、および、電磁波吸収体用組成物
KR101926453B1 (ko) 전자기파 차폐시트용 조성물 및 전자기파 차폐시트
WO2023126876A1 (en) Electromagnetic absorber application to radar retroreflective devices
JPWO2025028488A5 (https=)
CN121420635A (zh) 电磁波吸收体

Legal Events

Date Code Title Description
A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20230525

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20241127

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20251211

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20260209

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20260331

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20260407

R150 Certificate of patent or registration of utility model

Ref document number: 7847546

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150