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1. 发明专利

JP2003110345A ANTENNA ELEMENT AND COMMUNICATION APPARATUS USING THE SAME 审中-公开
公开(公告)号：JP2003110345A
公开(公告)日：2003-04-11
申请号：JP2001295743
申请日：2001-09-27
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： OKABE HIROSHI , TAKEDA ERIKO , AOYAMA HIROSHI , KIKUCHI KEIKO
IPC分类号： H01Q13/08 , H01Q1/24 , H01Q1/36 , H01Q1/38 , H01Q9/42
摘要： PROBLEM TO BE SOLVED: To provide an antenna element which is used for a mobile communication apparatus or the like, and in which radiation efficiency can be improved irrespective of shape of a circuit board conductor and wide bandwidth can be realized, and to provide a communication apparatus using the antenna element. SOLUTION: In this antenna element, a λ/2 radiation electrode which stretches from the central part of a surface of base substance composed of dielectrics in the symmetrical directions is installed on the surface. A ground conducting line is connected with a part in the vicinity of the center of the electrode, a power feed conductor line is connected with a part being isolated a specified distance from the central part, and at least one end portion out of both end portions of the radiation electrode is made an opened end. Impedance matching between the radiation electrode and a high-frequency signal source can be obtained, by adjusting drawing the power feeding conductor line and the ground conductor line.

2. 发明专利

JP2002271129A ANTENNA ELEMENT AND COMMUNICATIONS EQUIPMENT USING THE SAME 失效
公开(公告)号：JP2002271129A
公开(公告)日：2002-09-20
申请号：JP2001063168
申请日：2001-03-07
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： OKABE HIROSHI , TAKEDA ERIKO , AOYAMA HIROSHI , KIKUCHI KEIKO
IPC分类号： H01Q13/08 , H01Q1/36 , H01Q1/38 , H01Q9/26 , H01Q9/42 , H04B1/38 , H04B1/3822
摘要： PROBLEM TO BE SOLVED: To provide an antenna element to be used for the communications equipment of a traveling object, capable of improving the radiating efficiency and realizing band widening, regardless of the shape of the circuit board conductor by setting excitation at the antenna as being concluded, and to provide communications equipment which uses the antenna element. SOLUTION: This antenna element is provided with two similar radiating conductors extended to symmetric directions from a certain position on the surface of a board constituted of dielectric, and the edge of one radiating conductor near the other radiating conductor is formed as a power feeding edge. The edge of the other radiating conductor near one radiating conductor is formed as a ground edge, and the other edges of the both radiating conductors are formed as open edges. Then, a power feeding conductor connected to the power feeding edge and a ground conductor connected to the ground edge are arranged adjacently on the board, and the impedance of the ground conductor is matched with the input impedance of the power feeding conductor.

3. 发明专利

JPS6489963A RESONANCE TYPE CONVERTER 失效
公开(公告)号：JPS6489963A
公开(公告)日：1989-04-05
申请号：JP24348087
申请日：1987-09-28
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： IWATO TAISUKE , ONDA KENICHI , YAGINUMA TAKAO , MATSUDA YASUO , AOYAMA HIROSHI
IPC分类号： H02M3/28
摘要： PURPOSE:To stop working with safety, by interrupting current fed to a load on the secondary side of a transformer, to be set in a non-load state, at the time of stopping the working of a converter, and by setting a main switch in an OFF-state. CONSTITUTION:So far as a resonance type converter is concerned, to both the ends of the primary winding of a transformer 20, two main switches 15-16 confronted with each other are connected, and the converter is driven by respective driving circuits 12-13. On the secondary side of the transformer 20, at the directly rear section of a secondary winding having a center tap, a current interrupting circuit 10 for receiving working-stopping signal generated when excess current or the like is generated, and for interrupting secondary side current is set, and a rectifier circuit 21 and a smoothing circuit 22 are connected. Besides, said working-stopping signal is fed also to the driving circuits 12-13 for turning both the main switches 15-16 OFF via a delay circuit 11. Then, the current interrupting circuit 10 is worked, and current fed to a load 14 is interrupted. After delay for a specified period, the main switches 15-16 are set in an OFF-state.

4. 发明专利

JPH01243852A DESIGN METHOD AND DESIGN SUPPORT APPARATUS FOR VOLTAGE-RESONANCE TYPE CONVERTER 失效
公开(公告)号：JPH01243852A
公开(公告)日：1989-09-28
申请号：JP7043588
申请日：1988-03-24
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： YAGINUMA TAKAO , ONDA KENICHI , MATSUDA YASUO , AOYAMA HIROSHI , IWATO TAISUKE
IPC分类号： H02M3/28 , G06F17/50
摘要： PURPOSE:To shorten the design period of the apparatus, by deciding the equivalent circuit of a converter in such manner that said circuit corresponds to the commutation overlapping period and power transmission period of a full-wave rectifier circuit, and by analyzing the performance characteristic of said converter and determining its circuit constant in accordance therewith. CONSTITUTION:In a voltage-resonance type push-pull converter to be designed, a DC power supply Ei is symmetrically connected with the primary winding of a transformer T via a DC reactor Li and a pair of switching elements Q1, Q2, and a resonating capacitor Cr is juxtaposed with said primary winding to form a resonance circuit. Said switching elements Q1, Q2 are alternately ON-OFF driven by a detection winding Ng simultaneously with the zero voltage point of a resonance voltage to supply a load R with power from their secondary winding via a magnetic amplifier circuit MA, a full-wave rectifier circuit and the like. Also, the design support apparatus of said converter is composed of a data input means 1, a performance analysis means 2, a resonance current operating means 3, a circuit constant operating means 4, and a data output means 5 so that characteristics of the converter are analyzed and its design data are obtained in the manner of corresponding to its commutation overlapping period and power transmission period.

5. 发明专利

JPH01243848A RESONANCE-TYPE POWER CONVERTER 失效
公开(公告)号：JPH01243848A
公开(公告)日：1989-09-28
申请号：JP7043688
申请日：1988-03-24
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： AOYAMA HIROSHI , ONDA KENICHI , YAGINUMA TAKAO , MATSUDA YASUO , IWATO TAISUKE
IPC分类号： H02M3/28
摘要： PURPOSE:To prevent magnetic saturation of the title converter, by disposing in an array a reactor of a value smaller than that of the self-inductance of the primary winding of a transformer in equivalence to the primary or secondary winding. CONSTITUTION:A resonance-type DC-DC converter forms a DC input power source with a series circuit of a DC power source Ei and a reactor Li, which is connected to the primary winding of a transformer T through a pair of switching elements Q1 and Q2. A resonance circuit 1 of a resonance capacitor Cr and a reactor Lr is disposed in an array to this primary winding. Switching elements Q1 and Q2 are driven by a drive circuit 2 coming from the resonance type voltage detection winding Ng of the transformer T. On this occasion, for the value of the resonance reactor Lr, the reactor of such a value is used as is sufficiently smaller than that of the self-inductance Li of the whole primary winding. The switching frequency can thereby be heightened to high frequency without regard to the value of the self-inductance Li and the saturation of the transformer core can be prevented.

6. 发明专利

JP2005150876A Antenna, its manufacturing process, and communication apparatus employing the antenna 有权
标题翻译：天线及其制造工艺和通讯设备使用天线
公开(公告)号：JP2005150876A
公开(公告)日：2005-06-09
申请号：JP2003382003
申请日：2003-11-12
申请人： Hitachi Ltd , Hitachi Metals Ltd , 日立金属株式会社 , 株式会社日立製作所
发明人： TAKEI TAKESHI , AOYAMA HIROSHI
IPC分类号： H01Q13/08 , H01Q1/22 , H01Q1/24 , H01Q1/38 , H01Q1/40 , H01Q1/52 , H01Q5/10 , H01Q9/30 , H01Q9/42 , H01Q5/01
CPC分类号： H01Q9/30 , H01Q1/243 , H01Q1/38
摘要： PROBLEM TO BE SOLVED: To provide a small multimode antenna capable of sharing one feeding point by a plurality of frequencies in order to embodying a small and inexpensive multimedia radio terminal, and to provide its manufacturing process and a communication apparatus employing the antenna. SOLUTION: The antenna comprises a radiation conductor 1 arranged above a ground conductor 6, and first and second distributed constant circuits 2 and 3 being coupled with the radiation conductor 1. Each distributed constant circuit 2, 3 comprises a transmission line and has a branch wherein one end of the radiation conductor 1 is connected with one end of the distributed constant circuit 2 and the other end of the radiation conductor 1 is connected with one end of the distributed constant circuit 3. Joint of one end of the radiation conductor 1 and one end of the distributed constant circuit 2 becomes a single feeding point 9 where the radiation conductor 1 serves as the ground potential. The distributed constant circuit 2, 3 is designed as an equivalent circuit where different stubs are connected in parallel with the transmission line thus realizing impedance matching for a plurality of frequencies at the feeding point 9. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了提供一种能够通过多个频率共享一个馈电点的小型多模天线，以便体现小型且便宜的多媒体无线电终端，并提供其制造过程和采用该天线的通信装置。解决方案：天线包括布置在接地导体6上方的辐射导体1，第一和第二分布常数电路2和3与辐射导体1耦合。每个分布常数电路2,3包括传输线，并且具有分支，其中辐射导体1的一端与分布常数电路2的一端连接，辐射导体1的另一端与分布常数电路3的一端连接。辐射导体的一端的接头 1，分布常数电路2的一端成为辐射导体1用作接地电位的单个馈电点9。分布常数电路2,3设计为等效电路，其中不同的短截线与传输线并联连接，从而实现馈电点9处的多个频率的阻抗匹配。版权所有（C）2005，JPO＆NCIPI

7. 发明专利

JPH07170783A ACCESS CONTROLLER FOR CONVEYING LINEAR MOTOR 失效
公开(公告)号：JPH07170783A
公开(公告)日：1995-07-04
申请号：JP31626093
申请日：1993-12-16
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： NAKAGAKI HARUSHIGE , TANAKA HIROMI , AOYAMA HIROSHI
IPC分类号： H02P25/06 , H02P7/00 , H02P5/00
摘要： PURPOSE:To provide an access controller for bringing motor speed substantially into agreement with an access command input by providing a means for damping the motor speed in a part of a servo system, and suppressing the unnecessary increase and rapid change of the speed. CONSTITUTION:If a frequency function f1 is inputted from a command input 1, motor speed (v) rises with a delay. In accordance with this, position deviation DELTAN increases also, and tries to increase the motor speed rapidly. But the motor control signal corresponding to DELTAN becomes suppressed one, since the increase of the motor speed is detected by a speed-voltage converter 12 and voltage proportional to the speed is fed back to a comparator 13. As a result, the motor speed is damped, and the speed (v) changes slowly and does not exceed the input command f1. A similar response approximately equal to f1 is obtained.

8. 发明专利

JPS6469262A RESONANT CONVERTER 失效
公开(公告)号：JPS6469262A
公开(公告)日：1989-03-15
申请号：JP22565487
申请日：1987-09-09
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： ONDA KENICHI , MATSUDA YASUO , ABE KIMIHITO , IWATO TAISUKE , AOYAMA HIROSHI
IPC分类号： H02M3/28
摘要： PURPOSE:To ensure the initiation of oscillation, by providing a shortpreventive switching elements and an oscillation prevention circuit on the secondary side of a transformer. CONSTITUTION:A resonant converter is composed of switching elements M1-M2, a resonance circuit 1 made up of a transformer T, etc., a short-prevention circuit 2, an oscillation prevention circuit 3, a self-exciting oscillation circuit 4, a smoothing circuit 5, a fullwave rectification circuit 6, etc. If the secondary winding of the transformer T is brought into a short-circuit state, then the resonance current flowing to the secondary winding of the transformer T will flow to the secondary winding side where the winding becomes short and no voltage will be induced to each winding of the transformer T. On this account, no voltage can be applied any longer to control electrode of switching elements M1 and M2 from a winding Ns for self-exciting oscillation and oscillating operation will stop. In addition, the short-prevention circuit 2 prevents the secondary winding from getting to be shorted and the resonance current from flowing to the secondary winding side.

9. 发明专利

JP2009170704A Ferrite sintered compact and magnetic material antenna 有权
标题翻译：铁粉烧结紧密和磁性材料天线
公开(公告)号：JP2009170704A
公开(公告)日：2009-07-30
申请号：JP2008007952
申请日：2008-01-17
申请人： Hitachi Metals Ltd , 日立金属株式会社
发明人： GONDA MASAYUKI , FUJII SHIGEO , AOYAMA HIROSHI
IPC分类号： H01F1/11 , H01Q7/08
摘要： PROBLEM TO BE SOLVED: To provide a ferrite sintered compact with high magnetic permeability and low loss, which exhibits small variations in magnetic permeability even when the sintering temperature varies, and also to provide a small-sized magnetic material antenna suitable for use in a high-frequency band and a broad band. SOLUTION: A ferrite sintered compact is characterized in that it has a Y-type ferrite represented by a formula A 2 M 2 Fe 12 O 22 (wherein A denotes Ba and Sr, and M denotes Co and Zn) as its main phase and an initial permeability at 500 MHz of 4 or more, and that, in cross-sectional observation of the ferrite sintered compact, the area rate of a Ba-Sr rich phase, in which the content ratios of Ba and Sr are higher than that of the Y-type ferrite as the main phase, is less than 1%. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了提供具有高磁导率和低损耗的铁氧体烧结体，即使烧结温度变化，磁导率的变化也很小，并且还提供适合使用的小尺寸磁性材料天线在高频带和宽带中。解决方案：铁氧体烧结体的特征在于其具有由式A 2 2 Fe 12

10. 发明专利

JP2008072686A Antenna device and multi-band type wireless communication apparatus using the same 有权
标题翻译：天线装置和多带无线通信装置
公开(公告)号：JP2008072686A
公开(公告)日：2008-03-27
申请号：JP2007094051
申请日：2007-03-30
申请人： Hitachi Metals Ltd , 日立金属株式会社
发明人： TAKAGI YASUNORI , AOYAMA HIROSHI , IDENO HIROTO
IPC分类号： H01Q9/42 , H01Q1/24 , H01Q1/38 , H01Q5/00 , H01Q5/10 , H01Q5/364
摘要： PROBLEM TO BE SOLVED: To provide an antenna device, while saving space, which is capable of operating in wide bands (in a multi-band) and of achieving an excellent gain and maintaining non-directivity of vertically polarized waves in each band. SOLUTION: The antenna device has a conductor antenna 110 of which an end portion 111a on one end side is mounted as a power feeding section and an end portion 112a on the other end side is mounted as an open end terminal, and a substrate 120 disposed between the one end side and the other end side of the conductor antenna and made of an insulating material which is coupled to the one end side and the other end side, wherein the conductor antenna is approximately U-shaped. Thus, the substrate is coupled in a place where an electric field strength of the conductor antenna having a folded-back portion is increased, thus achieving the wideband, high gain and non-directivity of vertically polarized waves even in each band. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了提供天线装置，同时节省能够在宽带（多频带）中工作的空间，并且在每个天线装置中实现极好的增益并保持垂直极化波的非方向性带。解决方案：天线装置具有导体天线110，其一端侧的端部111a安装为供电部，另一端侧的端部112a作为开放端子安装，基板120设置在导体天线的一端侧和另一端侧之间，并且由连接到一端侧和另一端侧的绝缘材料制成，其中导体天线大致为U形。因此，在具有折回部分的导体天线的电场强度增加的地方，基板被耦合，从而即使在每个波段也实现了垂直极化波的宽带，高增益和非方向性。版权所有（C）2008，JPO＆INPIT

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