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11. 发明专利

JPH1093364A DESIGN METHOD FOR MICROWAVE HIGH OUTPUT POWER AMPLIFIER 失效
公开(公告)号：JPH1093364A
公开(公告)日：1998-04-10
申请号：JP29130696
申请日：1996-09-10
申请人： JISEDAI EISEI TSUSHIN HOSO SYS , FUJITSU LTD
发明人： ISHIDA HITOSHI , KAWAKAMI YOICHI , ISHII KYOICHI
IPC分类号： H03F3/60 , H03F3/193
摘要： PROBLEM TO BE SOLVED: To provide the design method for the microwave high output power amplifier which is simply realized and from which a maximum power is obtained while satisfying almost the matching with a load. SOLUTION: The design method of the microwave high output power amplifier has a step (1) where an optimum load resistor (r1) to obtain a non-distortion maximum power is obtained through drawing based on an I-V characteristic (DC characteristic) between a drain and a source of a GaAS FET, a step (2) where an S parameter providing a maximum output of the GaAs FET is measured by a small signal operation, a step (3) where each equivalent circuit constant is decided so as to be in matching with the S parameter obtained as above, and a step (4), where the equivalent circuit constant Rds (equivalent drain-source resistance) obtained as above is replaced with an optimum load resistance (r1) obtained in the step (1) above and the actual circuit design is conducted finally. The microwave high output power amplifier is designed by the steps as above.

12. 发明专利

JPH11295366A METHOD FOR MEASURING PATTERN DIRECTION OF ANTENNA ABOARD SATELLITE USING MULTIBEAM, ETC., OR METHOD FOR ESTIMATING POSITION OF MOBILE GROUND STATION 失效
公开(公告)号：JPH11295366A
公开(公告)日：1999-10-29
申请号：JP10319598
申请日：1998-04-14
申请人： JISEDAI EISEI TSUSHIN HOSO SYS
发明人： TAKEDA OSAMU , HASHIMOTO YUKIO , KAWAKAMI YOICHI
IPC分类号： G01R29/10 , G01S19/38 , H01Q3/26 , G01S5/14
摘要： PROBLEM TO BE SOLVED: To eliminate errors due to a time change in the conventional antenna pattern measurement when a pattern of a multibeam antenna aboard a satellite is measured. SOLUTION: According to this method for measuring a pattern direction of an antenna aboard a satellite using multibeams, etc., a test signal of a plurality of beams emitted from a multibeam transmission antenna 2 aboard a satellite 1 or the like is multiplexed, e.g. frequency divided or the like, and detected almost simultaneously at one fixed ground station 6. A relative level difference of two detection powers among the plurality of beams detected at the ground station 6 is detected. The direction of a pattern 4 of the transmission antenna aboard the satellite 1 or the like is measured from the intersection of a plurality of contour curves based on the relative level difference.

13. 发明专利

JPH11266115A EXTENSION TYPE ANTENNA TRUSS STRUCTURE 失效
公开(公告)号：JPH11266115A
公开(公告)日：1999-09-28
申请号：JP6635398
申请日：1998-03-17
申请人： MITSUBISHI ELECTRIC CORP , JISEDAI EISEI TSUSHIN HOSO SYS
发明人： NAKAGAWA JUN , YAMATO MITSUTERU , HARIO KENICHI , TSUNODA HIROAKI , KAWAKAMI YOICHI
IPC分类号： H01Q15/14 , H01Q1/08 , H01Q1/28
摘要： PROBLEM TO BE SOLVED: To provide an extension type antenna truss structure which surely allow an antenna reflection mirror part to be extended, takes a satisfactory balance of the inner force structurally, is light-weight and can make the storage size smaller. SOLUTION: On an upper surface of a basic module 1 of an extension truss is installed a mirror surface 2a of an antenna reflection mirror surface part 2, on a lower surface is installed a rear surface cable 2b, and by connecting both of them with a tie cable 2c, a reflection mirror surface shape is formed. Moreover, an upper and lower screen inner material for carrying in-surface flexibility of a conventional truss structure is removed and the in-surface flexibility of the truss structure can be secured by the antenna reflection mirror surface part 1.

14. 发明专利

JPH10160775A METHOD FOR MEASURING PATTERN OF ANTENNA MOUNTED ON SATELLITE 失效
公开(公告)号：JPH10160775A
公开(公告)日：1998-06-19
申请号：JP32903196
申请日：1996-11-26
申请人： JISEDAI EISEI TSUSHIN HOSO SYS
发明人： HARIO KENICHI , TAKEDA OSAMU , MIYAUCHI MASAO , KAWAKAMI YOICHI
IPC分类号： G01R29/10 , H01Q3/26 , H01Q25/02 , H04B7/185
摘要： PROBLEM TO BE SOLVED: To provide a method for measuring the radiation pattern and the direction of peak directivity of a communication antenna mounted on a satellite conveniently on an orbit using existing units mounted on the satellite. SOLUTION: An existing receiving antenna 6 for communication mounted on a satellite is connected with a transmission antenna 7 for communication. A signal transmitted from the ground is received by the receiving antenna 6 and then transmitted back to the ground through the transmission antenna 7 in order to measure the receiving sensitivity of the receiving antenna 6. The receiving sensitivity is measured, (1) while varying the attitude of the satellite 5, (2) while varying the position of ground antenna systems 1a, 1b or (3) while varying the radiation pattern of the receiving antenna 6 thus measuring the radiation pattern of the receiving antenna 6.

15. 发明专利

JP2000196549A METHOD FOR MODULATING PLURALITY OF CARRIERS 失效
公开(公告)号：JP2000196549A
公开(公告)日：2000-07-14
申请号：JP36828498
申请日：1998-12-25
申请人： JISEDAI EISEI TSUSHIN HOSO SYS
发明人： HASHIMOTO YUKIO , TAKEDA OSAMU , KAWAKAMI YOICHI
IPC分类号： H04L27/20 , H04J1/20 , H04J11/00 , H04J13/00 , H04L27/26
摘要： PROBLEM TO BE SOLVED: To effectively utilize a dynamic range of an amplifier by avoiding a defect of an amplifier input reaching a multiple of number of carriers resulting from sum of maximum values of instantaneous amplitude of the carriers when phases of the carriers are matched in the case of using a method of synthesizing a plurality of the carriers from one or a few reference oscillators to decrease a maximum input voltage possibly to be caused. SOLUTION: In the method for modulating a plurality of carriers, one or a few reference oscillators 1 generate a plurality of carriers and each modulator 8 for a transmitter for frequency multiplex communication or code multiplex communication that digitally modulates a plurality of the carriers gives an optional offset to each carrier as an initial phase so as to reduce a maximum amplitude of the input to a high frequency amplifier, Thus, the dynamic range of the amplifier 10 where a linear operating region is limited or a maximum input amplitude voltage has a limitation can effectively be utilized.

16. 发明专利

JPH10327015A MESH MIRROR SURFACE 失效
公开(公告)号：JPH10327015A
公开(公告)日：1998-12-08
申请号：JP13182397
申请日：1997-05-22
申请人： MITSUBISHI ELECTRIC CORP , JISEDAI EISEI TSUSHIN HOSO SYS
发明人： SUGIMOTO TOSHIO , HARIO KENICHI , TSUNODA HIROAKI , KAWAKAMI YOICHI
IPC分类号： H01Q15/14 , H01Q1/28
摘要： PROBLEM TO BE SOLVED: To spread a mesh mirror surface in a prescribed shape without obstructing a truss structure by the fixed point reaction force of the mesh mirror surface by providing stand-off constituted of a highly rigid material on the vertex of the mirror surface outermost peripheral part of the truss structure and providing the stand-off constituted of a cable material on the other. SOLUTION: Among the stand-off for fixing a reinforcing cable 2 and a back surface cable 4 at the vertex of the respective modules of the truss structure, the stand-off 7a constituted of the highly rigid material made of CFRP is provided on the plural vertexes of the mirror surface outermost peripheral part and the stand-off 7b constituted of the cable material is provided on the other vertexes. Thus, among reaction force from a mesh 1 generated at the connection point of a cable and the truss structure immediately before development end, the reaction force in a tangent direction to the mirror surface acts only on the vertexes of the mirror surface outermost peripheral part of the truss structure. Also, among the reaction force acting on the vertex of the internal module of the truss structure, since the component force in the tangent direction to the mirror surface is small, truss development force is not obstructed.

17. 发明专利

JPH10256697A MOUNTING STRUCTURE OF CHIP TYPE PART 失效
公开(公告)号：JPH10256697A
公开(公告)日：1998-09-25
申请号：JP6112197
申请日：1997-03-14
申请人： FUJITSU LTD , JISEDAI EISEI TSUSHIN HOSO SYS
发明人： YABE NORIO , OBA TAKESHI , ISHIDA HITOSHI , KAWAKAMI YOICHI
IPC分类号： H05K3/30 , H05K1/18 , H05K3/34
摘要： PROBLEM TO BE SOLVED: To provide a mounting structure for chip type parts wherein a mounting area is reduced relating to series/parallel connection of chip type parts. SOLUTION: On a printed wiring board 20, the first supporting means 34 which comprises the first recessed part engaging with the first chip type parts 22, an the second supporting means 36 which comprises the second recessed part engaging with the second chip type parts 28 are mounted. Relating to plural first chip type parts 22, the first electrode 24 engages with the first recessed part, to be mounted with the first electrode 24 on the side of printed wiring board 20. Relating to the second chip type parts 28, the third electrode 30 engages with the second recessed part, to be mounted with the third electrode 24 on the side of printed wiring board 20. The adjoining first and second chip type parts 22 and 28 are insulated and separated from each other with an insulating means. The first and second chip type parts 22 and 28, being a pair, is electrically connected with the connection means 38. Thus, the chip type parts 22 and 28 are series/parallel connected.

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