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公开(公告)号：JPH01256198A
公开(公告)日：1989-10-12
申请号：JP8429588
申请日：1988-04-05
Applicant: NEC CORP
Inventor： HARADA TAKASHI , HATAKEYAMA KENICHI
Abstract: PURPOSE:To minimize decrease of shielding effect by providing one or more cross-shaped or radial cut to a cloth or nonwoven fabric surface of good conductive fiber such as fine metal fiber, metal coated resin fiber and carbon fiber. CONSTITUTION:A cross-shaped cut 2 for cable through is provided to a surface of cloth or nonwoven fabric 1 of conductive fiber such as metal fiber having a diameter of several mum-1mm, carbon fiber and metal coated resin fiber. Usually, edges of the conductive cloth or nonwoven fabric 1 are put in and fixed by a conductive frame 3 of metal, etc., which is made equipotential by use of conductive adhesive, etc. The size of the cut 2 is minimized to allow a connector provided on both edges of a cable 5 passing through. Therefore, clearance at the cut 2 caused by the through cable 5 remains at a small section near the cable 5 due to the flexibility of the conductive cloth or the nonwoven fabric 1. It is also possible to minimize decrease of shield effect even through a cable having a relatively large connector.
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公开(公告)号：JPH01179399A
公开(公告)日：1989-07-17
申请号：JP93988
申请日：1988-01-05
Applicant: NEC CORP
Inventor： INUI TETSUJI , HATAKEYAMA KENICHI , YOSHIUCHI AKIRA
Abstract: PURPOSE:To obtain a sheet-shaped thin radio wave absorber which has good characteristics in both vertical incidence and grazing incidence, by a structure wherein strip-shaped radio wave absorber sheets each of which has the specific thickness and length for a wavelength lambda are arranged cyclically in a surface of a dielectric sheet made of a material with relative low loss and buried therein. CONSTITUTION:Strip-shaped high loss sheets 1 (radio wave absorber sheets) are inserted into a low loss sheet 2 (dielectric sheet) and the size of each the strip-shaped high loss sheet 1 is adjusted to the predetermined wavelength, and thereby both wave absorber and wave scattering effects are obtained in the strip-shaped high loss sheets 1. Further, a plurality of the strip-shaped high loss sheets 1 are superposed each other, and thereby in addition to said effects, a multiple reflection effect is obtained among the strip-shaped high loss sheets 1, 1,.... Moreover, medium constants of the strip-shaped high loss sheet 1 and the low loss sheet 2, and thickness of the low loss sheet 2, and inserting positions, shape and arranging method about the strip-shaped sheets 1 are adjusted, respectively, and thereby a radio wave absorber can be provided which has good characteristics in both vertical incidence and grazing incidence. The size factors of the wave absorber are set for a wavelength lambda as follows ; d w in length.
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公开(公告)号：JPS63200599A
公开(公告)日：1988-08-18
申请号：JP3397787
申请日：1987-02-16
Applicant: NEC CORP
Inventor： HATAKEYAMA KENICHI , INUI TETSUJI
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公开(公告)号：JPS63194399A
公开(公告)日：1988-08-11
申请号：JP2664287
申请日：1987-02-06
Applicant: NEC CORP
Inventor： HATAKEYAMA KENICHI , INUI TETSUJI
IPC: H05K9/00
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公开(公告)号：JPS6314499A
公开(公告)日：1988-01-21
申请号：JP15824186
申请日：1986-07-04
Applicant: NEC CORP
Inventor： HATAKEYAMA KENICHI , INUI TETSUJI
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Patent Agency Ranking
公开(公告)号：JPS61202831A
公开(公告)日：1986-09-08
申请号：JP4435185
申请日：1985-03-06
Applicant: NEC CORP
Inventor： HATAKEYAMA KENICHI , INUI TETSUJI
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公开(公告)号：JP2001176593A
公开(公告)日：2001-06-29
申请号：JP36190399
申请日：1999-12-20
Applicant: NEC CORP , NEC TOHOKU LTD
Inventor： KIKUCHI KAZUYA , HATAKEYAMA KENICHI
IPC: H01R13/11 , H01R11/12 , H01R13/115 , H01R43/16
Abstract: PROBLEM TO BE SOLVED: To provide a contact for a connector that is able to shorten the time required to fabricate, coping with a fine pitch, to reduce the cost, to contact a male contact with a rolled surface having high smoothness, and to have an enough insertion length of the male contact. SOLUTION: A connector 1 includes a main body 12, a pair of elastic pieces 13 extending in a beam shape from both sides of the main body 12 to the same side, and a contact 14 formed at the tip of each of the elastic pieces 13. The contact also includes a protrusion 23 formed at the tip of each of the elastic pieces 13 extending in an opposite direction to the other elastic piece 13, and equipped with a contact 14. The contacts 14 can oppose to each other by distorting or bending the pair of elastic pieces 13. As a result, there is no need for forming the main body 13 having a U-shaped cross-section, and the contacts 14 can be arranged by deviating the positions against the main body 12.
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公开(公告)号：JPH09275295A
公开(公告)日：1997-10-21
申请号：JP8422396
申请日：1996-04-05
Applicant: NEC CORP , TOKIN CORP , TOHOKU KAKO KK
Inventor： HATAKEYAMA KENICHI , TOGAWA HITOSHI , NISHIMURA MIKIO
Abstract: PROBLEM TO BE SOLVED: To enable a radio wave absorbent to be lessened in weight and improved in fire resistance without deteriorating it in radio wave absorbing properties by a method wherein ceramic fiber where conductive material is attached is formed into nonwoven fabric, and the radio wave absorbent is formed of the nonwoven fabric. SOLUTION: A radio wave absorbent 10 is formed of nonwoven nonwoven fabric of ceramic fiber 14 where conductive fiber 12 is attached. The ceramic fiber 14 is mainly formed of alumina or silica and 2.8μm in average diameter. Nonwoven fabric 10mm in thickness of ceramic fiber 14 is dipped into an aqueous solution where carbon particles are dispersed so as to attach carbon particles to the ceramic fiber and dried up for the formation of the radio wave absorbent. By this setup, a radio wave absorbent can be enhanced in fire resistance keeping light in weight and without deteriorating in radio wave absorbing properties by taking advantage of the action of the ceramic fiber 14.
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公开(公告)号：JPH08146061A
公开(公告)日：1996-06-07
申请号：JP29135294
申请日：1994-11-25
Applicant: NEC CORP
Inventor： TSUKAGOSHI TSUNEO , HATAKEYAMA KENICHI , MASUDA KOICHIRO
Abstract: PURPOSE: To provide a high-frequency current probe which has a relatively simple structure and can be manufactured inexpensively and is less affected by external magnetic field by forming, as a whole, a probe body with one member. CONSTITUTION: Since a probe body 1 is formed with one member and is in relatively simple structure by filling a magnetic body 4 inside, the number of parts required for manufacture is small, the manufacturing process can be reduced, and the probe can be manufactured inexpensively. Further, since the body 1 is constituted of a metal member, a measurement error due to the influence of external magnetic field can be suppressed to accurately measure current. Further, since a cable 5 to be measured and an internal metal cylinder 11 form a coaxial line, thus inducing a current with an equal amount of current flowing to the cable 5 at the body 1, increasing an output signal, and improving measurement sensitivity. Therefore, for example, even if equivalent noise components up to now are received, noise components can be effectively suppressed in terms of error rate, thus improving the S/N ratio of output signal and achieving an accurately measurement.
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公开(公告)号：JPH05299870A
公开(公告)日：1993-11-12
申请号：JP12678892
申请日：1992-04-20
Applicant: NEC CORP , TODA KOGYO CORP , NEC ENVIRONMENT ENG LTD
Inventor： HATAKEYAMA KENICHI , YAMAMOTO SHIGEHISA , NAKAMURA TATSUYA , SHIMIZU SHIGEMI
IPC: H05K9/00
Abstract: 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.
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