GB1339791A - Electro-magnetic wave attenuators - Google Patents

Electro-magnetic wave attenuators

Info

Publication number
GB1339791A
GB1339791A GB178171A GB178171A GB1339791A GB 1339791 A GB1339791 A GB 1339791A GB 178171 A GB178171 A GB 178171A GB 178171 A GB178171 A GB 178171A GB 1339791 A GB1339791 A GB 1339791A
Authority
GB
United Kingdom
Prior art keywords
electro
jan
medium
product
magnetic wave
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.)
Expired
Application number
GB178171A
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
TDK Electronics Corp
Original Assignee
TDK Corp
TDK Electronics 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, TDK Electronics Corp filed Critical TDK Corp
Publication of GB1339791A publication Critical patent/GB1339791A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/76—Prevention of microwave leakage, e.g. door sealings
    • H05B6/763—Microwave radiation seals for doors
    • 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
    • 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
    • H01Q17/001—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems for modifying the directional characteristic of an aerial

Abstract

1339791 Ferrite compositions TDK ELECTRONICS CORP 14 Jan 1971 [21 Jan 1970 30 Oct 1970] 1781/71 Heading H1H [Also in Divisions H4 and H5] An electromagnetic wave absorbing medium comprises a mixture of a ferromagnetic material, such as a powdered ferrite, and a dielectric material, such as rubber, or a resin. It is arranged that the product of the moduli of the complex relative permittivity and permeability of the medium exceeds 10, and that the product of their real parts exceeds 6. The medium may be used in a seal for the door of an oven or other chamber heated by microwaves.
GB178171A 1970-01-21 1971-05-14 Electro-magnetic wave attenuators Expired GB1339791A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP509870 1970-01-21

Publications (1)

Publication Number Publication Date
GB1339791A true GB1339791A (en) 1973-12-05

Family

ID=11601888

Family Applications (1)

Application Number Title Priority Date Filing Date
GB178171A Expired GB1339791A (en) 1970-01-21 1971-05-14 Electro-magnetic wave attenuators

Country Status (3)

Country Link
DE (1) DE2102840A1 (en)
GB (1) GB1339791A (en)
NL (1) NL172291C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2134128A (en) * 1983-01-27 1984-08-08 Oilfield Inspection Services Magnetically conductive materials and articles and methods using them
GB2153367A (en) * 1984-01-30 1985-08-21 Picker Int Ltd Flexible shim for n.m.r. apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3133441C2 (en) * 1981-08-24 1984-02-02 Precitronic Gesellschaft für Feinmechanik und Electronic mbH, 2000 Hamburg Shielding against electromagnetic impulses
GB2122059B (en) * 1982-05-28 1985-08-07 Tdk Electronics Co Ltd An absorber device for microwave leakage
JPS59158016A (en) * 1983-02-28 1984-09-07 ティーディーケイ株式会社 Electromagnetically shielding material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2134128A (en) * 1983-01-27 1984-08-08 Oilfield Inspection Services Magnetically conductive materials and articles and methods using them
GB2153367A (en) * 1984-01-30 1985-08-21 Picker Int Ltd Flexible shim for n.m.r. apparatus
US4631481A (en) * 1984-01-30 1986-12-23 Picker International Limited N.M.R. shims

Also Published As

Publication number Publication date
NL7100825A (en) 1971-07-23
NL172291C (en) 1988-01-18
DE2102840A1 (en) 1971-07-29
NL172291B (en) 1983-03-01

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years