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21. 发明专利

JPH08166842A OPTICAL BUS CIRCUIT DEVICE 失效
公开(公告)号：JPH08166842A
公开(公告)日：1996-06-25
申请号：JP30878594
申请日：1994-12-13
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： ITO KEIICHIRO , MIKAZUKI TETSUO , KATAGIRI YOSHIMASA , WATABE AKINORI
IPC分类号： G06F3/00
摘要： PURPOSE: To provide an optical bus circuit device capable of diverting conventional dedicated circuts, unchangeable in the load state of common circuit by the number and arrangement of the dedicated circuits, fast in operation and easy in connection. CONSTITUTION: A circuit board 11 is provided with the common circuit 1 consisting of an optical transmitting circuit 4, an optical star coupler 61, and an optical fiber 71. Further, the circuit board 11 is fitted with a connector 3 connected to the electric circuit for an optical transmitting circuit 4 and an optical receiving circuit 5. The dedicated circuits 2 formed on a circuit board 21 are connected detachably to connectors 3. An electric signal outputted from one dedicated circuit 2 is sent to the optical transmiting circuit 4 through the connector 3 to become a light signal, which is sent to the optical receiving circuit 5 through the optical star coupler 61 and optical fiber 71 to become an electric signal, so that the electric signal is sent to other dedicated circuits 2 through the connectors 3.

22. 发明专利

JPH06244632A POWER FEEDING CIRCUIT FOR ARRAY ANTENNA 失效
公开(公告)号：JPH06244632A
公开(公告)日：1994-09-02
申请号：JP2876693
申请日：1993-02-18
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： ITO KEIICHIRO , ISHII OSAMU
IPC分类号： H01Q21/06
摘要： PURPOSE:To provide power feeding at an antenna provided with a negative resistance element and impedance matching at the same time by forming the N+1 terminal pairs of circuit networks combining 2N pairs of transmission lines provided with a specified length and a characteristic impedance. CONSTITUTION:The transmission line of the characteristic impedance shown by a formula I with the length of a 1/4 wavelength on a line is connected to an n-th [(n) is an integer larger than 1 and smaller than N) element (assuming that a resistance value is defined as Rn and the set values of the amplitude and phase of a supplying current are respectively defined as xsin and deltan (radian.)] Further, the transmission line of the characteristic impedance shown by a formula IV with the length of Ln simultaneously satisfying the conditions of formulas II and III or Ln+kappa (kappa is an integer larger than 1) adding the integer multiple of a wavelength to that value is continuously serially connected. Then, all the N pieces of terminals on the side, where respective elements are not connected, are connected at one point and high frequency power is supplied to that junction. In the formulas I-TV, (m) is integers from 1 to N, Sn is the code of a resistor Rn, and lambdadn is the wavelength on the line.

23. 发明专利

JPH06112731A ARRAY ANTENNA 失效
公开(公告)号：JPH06112731A
公开(公告)日：1994-04-22
申请号：JP26152192
申请日：1992-09-30
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： ISHII OSAMU , ITO KEIICHIRO , KAGOSHIMA KENICHI
IPC分类号： H01Q3/34 , H01Q21/12
摘要： PURPOSE:To provide a compact array antenna which can ensure the high gain. CONSTITUTION:An array antenna contains the antenna elements of odd numbers, e.g. 8-1, 8-3 and 8-5 which have the positive polarity of the radiation resistance secured in a driving state and the negative antenna elements of even numbers, e.g. 8-2 and 8-4 respectively. In such a constitution of the array antenna, the coincidence is secured between the phase of the electric power supplied from the antenna element of the negative radiation resistance and the phase of the input electric power supplied to the antenna from the outside. Furthermore the sum of each electric power is distributed to the antenna elements of the positive radiation resistance. For these purposes, a feeding circuit network 10 having the branches is added to the array antenna.

24. 发明专利

JPH0697723A COMPACT ANTENNA 失效
公开(公告)号：JPH0697723A
公开(公告)日：1994-04-08
申请号：JP26793692
申请日：1992-09-11
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SUZUKI TAKAFUMI , ITO KEIICHIRO , NAGAI YASUHIRO , MICHIGAMI OSAMU
IPC分类号： H01Q9/04
摘要： PURPOSE:To provide a highly efficient compact antenna by forming a miniature radiation element on a dielectric substrate. CONSTITUTION:A meandering radiation element 11 consists of a folded linear conductor formed on a dielectric substrate 14 and has an element length of 8mm shorter than a rectilinear half-wavelength dipole element that is used in a resonant state in terms of the main polarized wave field direction. The element 11 is used as an antenna radiation element. The physical length of the element 11 is reduced in the main polarized wave field direction less than the length set under vacuum due to the dielectric constant of the substrate 14. Furthermore a matching circuit 12 (12a) to secure the matching of their impedances is connected between the element 11 and a feeding system 13.

25. 发明专利

JPH05248844A 失效
公开(公告)号：JPH05248844A
公开(公告)日：1993-09-28
申请号：JP19582792
申请日：1992-03-06
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TSURU KOUJI , ITO KEIICHIRO , MICHIGAMI OSAMU
IPC分类号： G01B15/00 , G01B15/02 , H01L21/66
摘要： PURPOSE:To measure the width or the thickness of a linear conductor thin film, which is formed on a substrate made of dielectric. CONSTITUTION:When the width or the thickness of a linear conductor thin filmy which is formed on a substrate 1 of dielectric, is measured, microstrip lines having stubs 2 corresponding to the thin film are conductor thin film is formed. The transmitting frequency characteristics of the microstrip lines having the stubs 2 are measured. The width or the thickness of the linear conductor thin film is measured by using a notch frequency based on the transmitting frequency characteristics.

26. 发明专利

JPH05226901A EQUALIZER FOR HIGH FREQUENCY COMMUNICATION SYSTEM 失效
公开(公告)号：JPH05226901A
公开(公告)日：1993-09-03
申请号：JP5890492
申请日：1992-02-12
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NAGAI YASUHIRO , ITO KEIICHIRO , MICHIGAMI OSAMU , SUZUKI TAKAFUMI
IPC分类号： H01P1/00 , H01P9/00 , H04B3/14
摘要： PURPOSE:To provide the equalizer for a high frequency communication system by applying the equalizer to a broad band at a low loss in order to allow the equalizer to be compatible with an optical communication system capable of long distance transmission at a high transfer speed. CONSTITUTION:A center conductor 15 is made of a superconducting oxide thin film, the entire delay line is formed in a meandering form and coupling lines 20 being basic components of the delay line and are formed in a meandering form, then a low loss is realized and miniaturization is realized, the degree of coupling of a high frequency signal to be propagated is set to a proper degree and frequency dispersion is provided to the signal delay line, a relative delay time required for the equalizer is obtained and reproduction of the optical fiber dispersion over a broad band is compensated.

27. 发明专利

JPH05206705A HIGH-FREQUENCY FILTER 失效
公开(公告)号：JPH05206705A
公开(公告)日：1993-08-13
申请号：JP3708792
申请日：1992-01-28
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NAGAI YASUHIRO , SUZUKI TAKAFUMI , ITO KEIICHIRO , MICHIGAMI OSAMU
IPC分类号： H01L39/00 , H01P1/203 , H01P7/08
摘要： PURPOSE:To obtain a high-frequency filter in which an excellent pass block characteristic is enhanced and the pass block action is enabled or disabled selectively with a simple operation. CONSTITUTION:A half-wavelength resonator 9 being a center conductor on a board 5 is made of a superconducting thin film and magnetic field application elements 10 are provided on the whole or a part of the half-wavelength resonator 9 so as to be opposed to each other. Thus, while a small surface resistance, a large signal attenuation, a small resistance loss and miniaturization, etc., are realized, the superconductivity of the half-wavelength resonator 9 is reduced or lost and the pass band block action of the resonator with respect to a specific frequency by applying the magnetic field of the magnetic field application elements 10 to the resonator, thereby disabling the pass band blocking action of the resonator with respect to a specific frequency.

28. 发明专利

JPH05110329A SUPERCONDUCTING ANTENNA 失效
公开(公告)号：JPH05110329A
公开(公告)日：1993-04-30
申请号：JP29386891
申请日：1991-10-15
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SUZUKI TAKAFUMI , NAGAI YASUHIRO , ITO KEIICHIRO , MICHIGAMI OSAMU
IPC分类号： H01P5/08 , H01P5/02 , H01Q1/38 , H01Q9/26
摘要： PURPOSE:To obtain a small sized oxide conduction antenna with less connection and high reliability while the high gain performance is maintained by forming a meander radiation element being a single line and a 1/4 wavelength meander matching circuit onto one superconducting film substrate. CONSTITUTION:A meander radiation element 1 being a single line and a 1/4 wavelength meander matching circuit 2 comprising a coplaner strip flat couple line in the superconducting antenna comprising a feeding system 3, the matching circuit and the radiation element are formed to one superconducting film substrate 4. Moreover, the antenna consists of the radiation element in self- resonance at an operating center frequency in which the electric element length in the main polarized wave electric field direction is shorter than the electric length of a linear half wavelength dipole element used in the resonance state. Thus, the mechanical connection part is reduced and the state with high performance is maintained, then the basic module of the small sized antenna required for the base station use antenna system is provided.

29. 发明专利

JPH04207403A SUPERCONDUCTING DEVICE AND PRODUCTION THEREOF 失效
公开(公告)号：JPH04207403A
公开(公告)日：1992-07-29
申请号：JP33054790
申请日：1990-11-30
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KOSHIMOTO YASUHIRO , ISHII OSAMU , ITO KEIICHIRO
IPC分类号： C04B37/02 , H01B12/06 , H01B13/00 , H01L39/00 , H01L39/02 , H01P1/04 , H01P3/08 , H01P11/00 , H01Q13/08 , H01R4/68
摘要： PURPOSE:To facilitate the connection to conductors indispensable for formation of the device while taking advantage of the characteristics of a high-temp. superconducting material by forming fiber-shaped underlying films along the direction where currents are ought flow on the surface of the superconducting thick film corresponding to a part to be joined to another member. CONSTITUTION:The fiber-shaped underlying films 5' are formed along the direction where the currents are ought flow on the surface of the superconducting thick film 7 corresponding to the part to be joined to the another member of the superconducting device constituted by forming the patterned superconducting thick film 7 via a metallic film 5 on a ceramic substrate 4. Then, the superconducting material is formed in the fibrous shape in an energizing direction and, therefore, a metallic connector 11 fused in the comb tooth- shaped alloy part has the form of being electrically press welded to the superconducting fiber 7. Since the joint area of the superconductor-metal is increased in parallel with the metallic joint, the resistance of the juncture is lowered. The easy connection of the high-frequency parts formed by using the high-temp. superconducting material with other parts is possible in this way.

30. 发明专利

JPS6448217A FLOATING TYPE MAGNETIC HEAD 失效
公开(公告)号：JPS6448217A
公开(公告)日：1989-02-22
申请号：JP20400087
申请日：1987-08-19
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： ITO KEIICHIRO , KOSHIMOTO YASUHIRO , KISHIGAMI JUNICHI , NISHIMURA TSUTOMU
IPC分类号： G11B5/127 , G11B5/31
摘要： PURPOSE:To obtain an efficient floating type head by opposing a 1st magnetic pole to a medium at the narrow width, opposing the 2nd magnetic pole to the medium at the width larger than the width of the 1st magnetic pole, sticking a soft magnetic film to the surface facing the medium and parting the part stuck with the soft magnetic film at about 0.2-0.5 times the shortest wavelength of recording as compared to the 1st magnetic pole from the medium surface. CONSTITUTION:A lower magnetic film 2a, a coil 2c, and an upper magnetic film 2b are laminated on a substrate 41 which constitutes a slider material. In addition, a protective film 2d, a gap layer, a coil flattening layer, etc., are inserted. The spacing between the upper and lower magnetic films is, therefore, wide in the coil part and is narrow at both ends thereof so as to constitute a closed magnetic path. The magnetic films therebetween are formed to a tapered shape. The main magnetic pole 21 is disposed on the lower magnetic film 2a and the auxiliary magnetic pole 22 on the upper magnetic film 2b. The part corresponding to the auxiliary magnetic pole 22 is etched and thereafter, the soft magnetic film of the thickness smaller than the etching depth is stuck thereto. The retraction depth of the auxiliary magnetic pole 22 is set at about 0.2-0.5 times the shortest wavelength. The floating type magnetic head which can maintain high efficiency is thereby obtd.

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