专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH06209181A RADIO WAVE ABSORBER 失效
公开(公告)号：JPH06209181A
公开(公告)日：1994-07-26
申请号：JP226693
申请日：1993-01-11
申请人： NEC CORP , NEC ENVIRONMENT ENG LTD , TODA KOGYO CORP
发明人： HATAKEYAMA KENICHI , SHIMIZU SHIGEMI , YAMAMOTO SHIGEHISA , NAKAMURA TATSUYA
IPC分类号： H01Q17/00 , H05K9/00
摘要： PURPOSE:To obtain radio wave absorber having a magnetic material layer whose permeability is large even in a high frequency band, by arranging pin- shaped soft ferrite sintered bodies vertically to a plate surface, and installing a magnetized permanent magnet on at least one surface of the plate. CONSTITUTION:Pin-shaped soft ferrite sintered bodies with 1-10mm diameter whose aspect ratio is 5 or larger are so arranged that the pin direction is vertical to the plane surface, and a ferrite plate 5 is formed by combining them with resin. Hard ferrite particle powder is kneaded in resin, and a layer of 2-30 mm in thickness is formed on the ferrite plate 5. Magnetized permanent magnets 4 are laminated on one side or on both sides or alternately laminated. A the pin-shaped soft ferrite sintered bodies used in the above process is nickel zinc spinel ferrite sintered bodies, or W type or Y type or Z type hexagonal system ferrite sintered bodies. The surface magnetic flux density of the permanent magnet is at least 100G. By a dielectric laminate using this, radio wave absorber is constituted.

2. 发明专利

JPH05291782A 失效
公开(公告)号：JPH05291782A
公开(公告)日：1993-11-05
申请号：JP11541992
申请日：1992-04-08
申请人： NEC CORP , TODA KOGYO CORP , NEC ENVIRONMENT ENG LTD
发明人： HATAKEYAMA KENICHI , HANKOU EIJI , YAMAMOTO SHIGEHISA , YOSHIUCHI AKIRA
IPC分类号： H05K9/00
摘要： PURPOSE:To stabilize electric wave absorbing performance and then reduce weight by mixing three types, namely a base material, a filling substance, and a conductive substance, simultaneously or constituting an electronic absorber by mixing either two types and then mixing the remaining one type to the mixture. CONSTITUTION:A base material such as a paint, rubber, and epoxy resin, a non-conductive and non-magnetic granular object such as granular polyetylene, expanded stylene beads, and glass ball, and a conductive material such as a conductive particle and a conductive fiber are mixed simultaneously or two types, namely a base material such as epoxy resin and a filling substance such as expanded styrene beads with a diameter of 6mm are mixed and then the conductive material such as conductive particle and conductive fiber are mixed to these two types, thus constituting an electric wave absorber. In this manner, a secondary surface is constituted on purpose and then a conductive particle, a conductive fiber, or a magnetic particle is laid out on the secondary surface, thus maldistributing the particle and hence stabilizing electric wave absorbing performance.

3. 发明专利

JPH05206677A RADIO WAVE ABSORBER 失效
公开(公告)号：JPH05206677A
公开(公告)日：1993-08-13
申请号：JP3565192
申请日：1992-01-27
申请人： NEC CORP , TODA KOGYO CORP , NEC ENVIRONMENT ENG LTD
发明人： HANKOU EIJI , HATAKEYAMA KENICHI , YAMAMOTO SHIGEHISA , SHIMIZU SHIGEMI
IPC分类号： B32B7/02 , H05K9/00
摘要： PURPOSE:To adjust the ratio of imaginary part/real part of a dielectric constant easily by a method wherein layers of dielectrics whose ratios of imaginary part/real part of the respective dielectric constants are different from each other are laminated. CONSTITUTION:A magnetic layer 2 and a dielectric layer 1 are laminated. The dielectric layer 1 is composed of laminated two layers of different dielectrics. The ratio of imaginary part/real part (tandelta) of the dielectric constant of the first dielectric 4 is tandelta 1. In accordance with the selection of the thicknesses of the layers of the dielectrics 4 and 5, the equivalent tandelta of the dielectric layer 1 can be adjusted within a range of 0.6-2.0. The first dielectric 4 is obtained by mixing particles of epoxy rubber, etc., with conductive particles or conductive fibers. The second dielectric 5 is obtained by impregnating foamed resin with conductive particles or conductive fibers. With this constitution, tandelta values can be easily adjusted.

4. 发明专利

JPH05206676A RADIO WAVE ABSORBER 失效
公开(公告)号：JPH05206676A
公开(公告)日：1993-08-13
申请号：JP3564792
申请日：1992-01-27
申请人： NEC CORP , TODA KOGYO CORP , NEC ENVIRONMENT ENG LTD
发明人： HATAKEYAMA KENICHI , YAMAMOTO SHIGEHISA , NAKAMURA TATSUYA , SHIMIZU SHIGEMI
IPC分类号： B32B7/02 , H01F1/00 , H01F1/34 , H05K9/00
摘要： PURPOSE:To avoid radio wave interference by a method wherein a magnetic material layer is composed of laminated magnetic sheets and bonded permanent magnet sheets. CONSTITUTION:A magnetic material layer 2 is composed of laminated magnetic sheets and bonded permanent magnet sheets. Not less than 90wt.% of soft ferrite particles having diameters of 0.5mum-5mm are kneaded with resin and the mixture is processed into a sheet having a thickness of 3-30mm to obtain the magnetic sheet. Hard ferrite particles are kneaded with resin and the mixture is processed into a sheet having a thickness of 2-30mm and the sheet is magnetized to obtain the bonded permanent magnet sheet. One or both sides of the magnetic sheet is or are cladded with the bonded permanent magnet sheet or sheets or the magnetic sheets and the bonded permanent magnet sheets are alternately laminated to compose a multilayer bonded magnetic unit. The surface magnetic flux density of the bonded permanent magnet sheet is not less than 100G. With this constitution, processability, moldability and installability can be improved and the radio wave absorber of the present invention can be easily applied to the wall of a building, etc., to avoid radio wave interference.

5. 发明专利

JPH0521982A ELECTROMAGNETICWAVE ABSORBER 失效
公开(公告)号：JPH0521982A
公开(公告)日：1993-01-29
申请号：JP19722391
申请日：1991-07-11
申请人： NEC ENVIRONMENT ENG LTD , NEC CORP , TODA KOGYO CORP
发明人： KIZAKI TAKASHI , YOSHIUCHI AKIRA , HATAKEYAMA KENICHI , YAMAMOTO SHIGEHISA
IPC分类号： H05K9/00
摘要： PURPOSE:To reduce the thickness of a electromagneticwave absorber by using a water-absorptive electrolyte as the filler to increase the dielectric constant of the absorber. CONSTITUTION:Utilizing that a water-absorptive electrolyte contains a constant amount of moisture under a constant temperature and humidity, it is filled with an open cell foam to increase dielectric constant. That is, as conventional, filling carbon black is added with a constant amount of electrolyte to give a electromagneticwave loss. This way enables an increase in dielectric constant and a decrease in height of a electromagneticwave absorber.

6. 发明专利

JPH05299870A 失效
公开(公告)号：JPH05299870A
公开(公告)日：1993-11-12
申请号：JP12678892
申请日：1992-04-20
申请人： NEC CORP , TODA KOGYO CORP , NEC ENVIRONMENT ENG LTD
发明人： HATAKEYAMA KENICHI , YAMAMOTO SHIGEHISA , NAKAMURA TATSUYA , SHIMIZU SHIGEMI
IPC分类号： H05K9/00
摘要： PURPOSE:To reduce a thickness, a weight of a film and to widen a frequency band of absorption characteristics without using a sintered material solidified on a plate by mixing spinel ferrite particles having diameters of a special range in resin and forming a magnetic layer in a thickness of a special range. CONSTITUTION:A radio wave absorbing material for forming a magnetic layer to be laminated on a metal plate has a layer which contains spinel ferrite particles each having a diameter of 0.5mum-5mm in resin and has a thickness of 10-30mm of 90wt. pattern or more. The resin layer having a high electric resistance is formed among the particles thereby to increase an electric resistance of an entire system. An increase in the resistance and an increase in a resonance frequency are simultaneously realized by introducing the resin layer thereby to obtain frequency characteristics of desired permeability. Particularly, excellent permeability characteristics are obtained in a high frequency band. Since a radio wave absorber using it is not formed of a sintered material, excellent processing.moldability and executability are realized to obtain excellent absorbing characteristics.

7. 发明专利

JPH05291785A 失效
公开(公告)号：JPH05291785A
公开(公告)日：1993-11-05
申请号：JP11971192
申请日：1992-04-13
申请人： NEC CORP , TODA KOGYO CORP , NEC ENVIRONMENT ENG LTD
发明人： HATAKEYAMA KENICHI , YAMAMOTO SHIGEHISA , NAKAMURA TATSUYA , SHIMIZU SHIGEMI
IPC分类号： B32B7/02 , H01F1/00 , H05K9/00
摘要： PURPOSE:To improved wave absorbing characteristics as well as machining property, forming property, and execution property of an electric wave absorber utilizing ferrite. CONSTITUTION:In the title absorber, a magnetic layer 2 is provided on a metal layer 1 and further a dielectric layer 3 is laminated on it in one piece. The magnetic layer 2 consists of a multi-layer structure of first and second layers, which are 1-30mm thick and made of a mixture of resin and 90wt.% or more magnetic particles of 0.5mum-5mm in diameter, The first layer includes a soft magnetic material where the frequency dispersion of the real part of permeability is (1/omega) (n>=1), and the second layer includes a soft magnetic material where the frequency dispersion of the real part of permeability is (1/omega) (n

8. 发明专利

JPH05291784A 失效
公开(公告)号：JPH05291784A
公开(公告)日：1993-11-05
申请号：JP11970592
申请日：1992-04-13
申请人： NEC CORP , TODA KOGYO CORP , NEC ENVIRONMENT ENG LTD
发明人： HATAKEYAMA KENICHI , YAMAMOTO SHIGEHISA , NAKAMURA TATSUYA , SHIMIZU SHIGEMI
IPC分类号： H01F1/00 , H05K9/00
摘要： PURPOSE:To improved electric wave absorbing characteristics as well as machining property, forming property, and execution property of an electric wave absorber utilizing ferrite. CONSTITUTION:In the title absorber, a magnetic layer 2 is provided on a metal layer 1 and further a dielectric layer 3 is laminated on it in one piece. The magnetic layer 2 allows a needle-shaped ferrite sintered body with a diameter of 1-10mm and an aspect ratio of 5 or higher to be aligned so that the direction of the needle shape is in vertical direction for the plate surface of the layer and these to be combined by resin. The magnetic layer 2 obtains characteristics where the real part of permeability is large at a wider frequency range.

9. 发明专利

JPH03226000A WAVE ABSORBER 失效
公开(公告)号：JPH03226000A
公开(公告)日：1991-10-04
申请号：JP2179690
申请日：1990-01-31
申请人： NEC CORP , NEC ENVIRONMENT ENG LTD
发明人： HARADA TAKASHI , HATAKEYAMA KENICHI , KIZAKI TAKASHI , YOSHIUCHI AKIRA
IPC分类号： H05K9/00
摘要： PURPOSE:To obtain a wave-absorbing characteristic whose attenuation amount is high by a method wherein a conductive fiber dispersion dielectric layer composed of a dielectric in which conductive fibers are dispersed into a high-polymer resin is laid between the layer of a magnetic loss body such as a ferrite or the like and the layer of a dielectric loss body in which a conductor such as carbon graphite or the like is dispersed into a high-polymer resin. CONSTITUTION:A laminated body of a magnetic loss body 2, a conductive fiber dispersion dielectric layer 3 and a dielectric loss body 4 is formed on the surface of a conductor 1. The magnetic loss body 2 is a nickel-zinc ferrite sintered body. The conductive fiber dispersion dielectric layer 3 is molded by spraying carbon fiber as conductive fibers 5 which have been dispersed into a glass fiber. The dielectric loss body 4 on the conductive fiber dispersion dielectric layer 3 is a pyramid-shaped molded body of foamed urethane to which carbon has been dispersed. It is possible to obtain a high attenuation amount over a wide band from several tens of MHz to several tens of GHz or higher.

10. 发明专利

JPH09306662A ELECTROMAGNETIC WAVE HEATING DEVICE 失效
公开(公告)号：JPH09306662A
公开(公告)日：1997-11-28
申请号：JP14100396
申请日：1996-05-10
申请人： NIPPON ELECTRIC IND , NEC CORP
发明人： WATANABE MASAKI , TAKEUCHI YASUO , MURAI YASUMASA , HATAKEYAMA KENICHI , TSUKAGOSHI TSUNEO
IPC分类号： H05B6/68
摘要： PROBLEM TO BE SOLVED: To detect the finish of a heat treatment work and automatically stop the work in the batch process in which electromagnetic waves are irradiated to a material to be heated and the materials are heated as a batch, and automatically stop the work after the heat treatment work of the final part of the material to be heated is finished in the continuous process, and efficiently conduct heat treatment work of a large volume of materials to be heated. SOLUTION: At least a thermometer 4 detecting the temperature of a heating part, a moisture sensor 5 detecting the moisture of the heating part, a power meter 6 in which electromagnetic waves containing microwaves emitted from a magnetron 1 are made incident and power corresponding to the incident electromagnetic waves is outputted, and a current transformer 7 detecting the reflecting power of the magnetron 1 are installed. A control part 3 in which when a detecting signal outputted from at least either of the thermometer 4, the moisture sensor 5, the power meter 6, and the current transformer 7 is inputted, the moisture content contained in kitchen refuse 9 is detected from the signal, and power supply to a magnetron power source 2 is automatically controlled and/or stopped is installed.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式