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1. 发明专利

JP2006351860A COMMON-MODE CHOKE COIL 审中-公开
公开(公告)号：JP2006351860A
公开(公告)日：2006-12-28
申请号：JP2005176570
申请日：2005-06-16
申请人： NIPPON TELEGRAPH & TELEPHONE , NTT ADVANCED TECH KK , SANRITSU ELECTRIC
发明人： HIRAKATA KATSUMI , OKAYASU RYOICHI , MIYAKE MAKOTO , AKIYAMA YOSHIHARU , SUZUKI TAKAHITO
IPC分类号： H01F17/06 , H01F19/00
摘要： PROBLEM TO BE SOLVED: To provide a common-mode choke coil suitable for miniaturization capable of preventing common-mode noise over a wide band without upsizing it and without attenuating a high frequency normal mode signal. SOLUTION: A pair of windings 2, 3 are formed by simultaneously winding two insulated wires L1, L2 about a closed magnetic circuit core 1 forming a closed magnetic circuit, and the both ends of the two insulated wires L1, L2 forming the pair of windings 2, 3 are connected to input terminals 4i, 5i and output terminals 4o, 5o, respectively. The pair of windings 2, 3 are formed by winding the two insulated wires L1, L2 about both cores 1a, 1b divided by a straight line L intersecting the closed magnetic circuit 1 at two points x, y from one intersection point x toward the other one y respectively by extending them across the straight line L and over the cores 1a, 1b. COPYRIGHT: (C)2007,JPO&INPIT

2. 发明专利

JP2006345038A PRINTED ANTENNA 审中-公开
公开(公告)号：JP2006345038A
公开(公告)日：2006-12-21
申请号：JP2005166654
申请日：2005-06-07
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OKUGAWA YUICHIRO , AKIYAMA YOSHIHARU
IPC分类号： H01Q1/38 , H01Q9/40 , H01Q13/08
摘要： PROBLEM TO BE SOLVED: To provide a wideband printed antenna that has radiation properties being omnidirectional on a horizontal surface over a wide band, and is advantageous in manufacturing costs and mounting. SOLUTION: The printed antenna has: coplanar track (the combination of an inner conductor 3 and grounds 4 each existing at the left/right of the inner conductor 3) formed by using a conductor thin film on a dielectric substrate 1; and a radiation element 2. The radiation element 2 has a slot 5, and the ground 4 of the coplanar track has a slot 6. COPYRIGHT: (C)2007,JPO&INPIT

3. 发明专利

JPH08240646A TESTING METHOD OF WITHSTAND STRENGTH TO PULSE INTERFERENCE WAVE SYNCHRONOUS WITH SIGNAL 失效
公开(公告)号：JPH08240646A
公开(公告)日：1996-09-17
申请号：JP4582295
申请日：1995-03-06
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： CHIKARAISHI SATORU , AKIYAMA YOSHIHARU , SUGANO SHIN
IPC分类号： G01R31/30 , G01R31/00
摘要： PURPOSE: To improve the reproducibility of the result of a test by a method wherein a voltage or the like simulating a pulse interference wave is impressed synchronously with the operation of a device to be tested. CONSTITUTION: A signal being synchronous with the operation of a device 1 to be tested (e.g. a control signal from an internal control circuit) is taken out by a synchronous signal detecting circuit 7 and transmitted to a synchronous signal shaping circuit 8. The signal shaped by the shaping circuit 8 is inputted to an external trigger terminal of a pulse waveform generating device 3 or to a computer 10 controlling the generating device 3. The generating device 3 outputs a voltage or the like simulating a pulse interference wave, synchronously with the signal inputted to the external trigger terminal or with a command sent from the computer 10. The voltage or the like outputted from the generating device 3 is inputted to impression circuits 4 and 5 and impressed on the device 1 to be tested. By taking out the signal being synchronous with the operation of the device 1 to be tested and by making the generating device 3 operate in this way, a test of a pulse interference wave withstand strength having high reproducibility is executed.

4. 发明专利

JPH07167904A INTERFERING WAVE BEARING FORCE TEST EQUIPMENT 失效
公开(公告)号：JPH07167904A
公开(公告)日：1995-07-04
申请号：JP31331593
申请日：1993-12-14
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： AKIYAMA YOSHIHARU , SUGANO SHIN , KUWABARA NOBUO , IDEGUCHI TAKESHI
IPC分类号： G01R29/08 , G01R31/00
摘要： PURPOSE:To rotate a test equipment without moving a wave absorber so as to realize a specified uniformity of electromagnetic field by setting a wave absorber table across a part of a turn table and arranging the wave absorber thereon. CONSTITUTION:A wave absorber table 24 is composed by being divided into four parts 1 to 4. A wooden plate 7 is used to raise the table 24 from a reference ground surface 9 and from the surface of a turn table 12. Also a conductor 10 connected electrically to the reference ground surface 9 is inserted between the wave absorber and the table 24. The area of the conductor 10 is desirably equal to or more than arrangement area of the wave absorber. Then the turn table 12 is buried in the floor surface of a wave dark room, and supported rotatably. The table 24 is inserted between the wave absorber and the reference ground surface 9, so that the surface of the turn table 12 may be in no contact with the wave absorber, and the uniformity of electromagnetic field is not varied even if a test equipment 13 is rotated, and thus ab equipment excellent in test efficiency can be realized.

5. 发明专利

JPH05322952A INTERFERENCE WAVE RESISTANCE TESTING METHOD AND ANECHOIC CHAMBER 失效
公开(公告)号：JPH05322952A
公开(公告)日：1993-12-07
申请号：JP15009092
申请日：1992-05-19
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： AKIYAMA YOSHIHARU , KUWABARA NOBUO , IDEGUCHI TAKESHI
IPC分类号： G01R29/10 , G01R31/00 , G01R31/30
摘要： PURPOSE:To improve the reproducibility of resistance test by prescribing an electromagnetic field which is applied to an equipment to be supplied in reference to an electromagnetic field distribution of a plane wave which is propagated on a semiinfinite plane and then using electric wave absorbers with different heights for achieving the electromagnetic field. CONSTITUTION:In an anechoic chamber 1, an electric wave absorber 4 is higher than an electric wave absorber 3 and is at a height which does not cause direct wave of a radiation antenna 2 which radiates electromagnetic wave to an equipment 5 to be absorbed within a range which is approximately 80cm from the floor at a location where the equipment 5 to be supplied is installed. The absorber 4 is lower than the absorber 3 which is near the antenna in reference to the floor and does not exceed a line 4a which connects the antenna 2 and the lowest point of the equipment 5, thus prescribing application electromagnetic field for a height of 80cm or less which is not prescribed conventionally and obtaining reproducibility even in a test of a large information processing device.

6. 发明专利

JP2019002869A 電磁的情報漏洩評価装置、電磁的情報漏洩評価方法、および電磁的情報漏洩評価プログラム审中-公开
公开(公告)号：JP2019002869A
公开(公告)日：2019-01-10
申请号：JP2017119651
申请日：2017-06-19
申请人： NIPPON TELEGRAPH & TELEPHONE , UNIV TOHOKU
发明人： ITAMI TAKESHI , CHOKAI YOHEI , SUZUKI YASUNAO , NAKAMURA MASAYUKI , AKIYAMA YOSHIHARU , HONMA TAKAFUMI , HAYASHI YUICHI , AOKI TAKAFUMI
IPC分类号： G01R29/08
摘要：【課題】電子機器から放射される漏洩電磁波から、画面情報が再現される電磁的盗視に対するリスクを、少ない計算コストで効率的かつ自動的に評価すること。【解決手段】電子機器から放射される漏洩電磁波Lから、電子機器70において表示されている画面情報が再現されるリスクを評価する電磁的情報漏洩評価装置10であって、電子機器70から放射される漏洩電磁波Lを計測し、かつ漏洩電磁波Lが計測された環境と同一環境において、電子機器70から漏洩電磁波Lが放射されていない場合に取得される背景雑音を計測する計測部20と、漏洩電磁波Lと背景雑音との間でt検定を行う検定部30と、t検定によって得られるt値に基づいて、漏洩電磁波Lから画面情報が再現されるリスクを評価する評価部50とを備える。【選択図】図1

7. 发明专利

JPH05223875A EVALUATING METHOD FOR JAMMING WAVE BEARING FORCE TESTING DEVICE 失效
公开(公告)号：JPH05223875A
公开(公告)日：1993-09-03
申请号：JP6154392
申请日：1992-02-17
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： AKIYAMA YOSHIHARU , KUWABARA NOBUO , IDEGUCHI TAKESHI
IPC分类号： G01R29/08 , G01R31/00
摘要： PURPOSE:To correctly evaluate the performance of an electromagnetic field impressing device for use in an interfering wave bearing power test by installing diffused objects in a interfering wave bearing power test device, measuring change of the diffusion electromagnetic field produced, and comparing the result with the corresponding theoretical value. CONSTITUTION:For example, a metal ball 2 is placed in a TEM cell 1. An electric field sensor 3 for measuring the electric field distribution around the metal ball 2 has as small an element as practicable to enable measurement of the spot intensity of electric field and is constructed as small as possible so as not to cause turbulence in the electric field distribution. For example, a 8mm element and the sensor 3 are connected together by a resistance wire while the sensor 3 and a display 5 are by an optical fiber cable 4 to lessen the influence upon the electric field distribution. Then measurement is conducted under certain conditions. In this manner, a ball whose electromagnetic field distribution when placed in a plane wave is clarified theoretically, is placed, and each electric field distribution in this case is measured, and this is compared with the theoretical value to serve knowing the size of the specimen which is measurable.

8. 发明专利

JP2019003889A 耐雷ヒューズ审中-公开
公开(公告)号：JP2019003889A
公开(公告)日：2019-01-10
申请号：JP2017119408
申请日：2017-06-19
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NAKAMURA NAOMICHI , GOTO SHINJI , AKIYAMA YOSHIHARU
IPC分类号： H01H85/055
摘要：【課題】雷サージ電流では溶断せず、異常電流では確実に溶断するヒューズを実現することが可能な耐雷ヒューズを提供すること。【解決手段】入力端子部10aと、出力端子部10bと、前記入力端子部10aと出力端子部10bとの間に介在したヒューズエレメント10cと、少なくとも前記ヒューズエレメント10cを被覆する絶縁カバー部10dと、少なくとも前記絶縁カバー部10dを被覆する導電性材料のメッキ処理部10eと、を備える。【選択図】図1

9. 发明专利

JP2019003844A 高周波分離ヒューズ审中-公开
公开(公告)号：JP2019003844A
公开(公告)日：2019-01-10
申请号：JP2017118234
申请日：2017-06-16
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NAKAMURA NAOMICHI , GOTO SHINJI , AKIYAMA YOSHIHARU
IPC分类号： H01H85/12 , H01H85/08 , H01H85/17
摘要：【課題】高周波の雷サージ電流では溶断せず、低周波の異常電流では確実に溶断する高周波分離ヒューズを提供すること。【解決手段】高周波電流を分離し、低周波電流によって溶断される高周波分離ヒューズ1であって、低周波電流を入力ポート部1a側から出力ポート部1b側へ流すことが可能な異常電流溶断部1dと、異常電流溶断部1dを覆うように配置され、高周波電流および低周波電流を入力ポート部1a側から出力ポート部1b側へ流すことが可能な外部筐体部1cとを備え、異常電流溶断部1dを流れる低周波電流が、予め決定された電流量を超える異常電流である場合、異常電流溶断部1dが溶断することによって、入力ポート部1aから出力ポート部1b側への異常電流の流れを遮断する。【選択図】図1

10. 发明专利

JPH06160449A INSTRUMENT FOR MEASURING INFLUENCE OF OBJECT ON ELECTROMAGNETIC FIELD 失效
公开(公告)号：JPH06160449A
公开(公告)日：1994-06-07
申请号：JP33496992
申请日：1992-11-24
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： AKIYAMA YOSHIHARU , KUWABARA NOBUO , IDEGUCHI TAKESHI
IPC分类号： G01R29/08 , G01R31/30
摘要： PURPOSE:To properly and efficiently measure the influence of an object on an electromagnetic field. CONSTITUTION:At the time of measuring the distribution of an electromagnetic field near a metallic object to be measured placed in the electromagnetic field, the intensity of the electromagnetic field is sent to an O/E converter 8 through an optical fiber 7 after the intensity is converted into an optical signal by means of a reception antenna having a small size and high input impedance. A network analyzer 1 measures the intensity of the electromagnetic field based on an electric signal converted by means of the converter 8.

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