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11. 发明专利

JPS62293803A ANTENNA SYSTEM FOR VEHICLE 失效
公开(公告)号：JPS62293803A
公开(公告)日：1987-12-21
申请号：JP13746786
申请日：1986-06-13
申请人： YAGI ANTENNA , HITACHI LTD
发明人： IMAI TAKESHI , TAKAHASHI AKIRA , HARADA NOBUYUKI
IPC分类号： H01Q1/32 , H01Q1/40 , H01Q9/28
摘要： PURPOSE:To attain sufficient performance without projecting provision of an antenna at the outside of a car body by coating the surface of a metallic plate by an insulating material and arranging the coated plate at the outside of the car body. CONSTITUTION:An antenna 3 is arranged to a recess 2a formed to a car body 1 made of a metal, e.g., to the front part of a roof 2. The antenna 3 has a prescribed gap to the roof 2 and the surface of the metallic plate 3a having through holes is coated by an insulation material 3b such as an FRP and the coated plate is arranged to the gap. Thus, the car body 2 and the antenna 3 are insulated electrically, the sheath of a feeder, e.g., one end of a coaxial cable 4 is connected to the car body 1, the core is connected to the antenna 3 and the other end is connected to an antenna terminal of a receiver 5. Thus, the antenna 3 is not projected at the outside of the car body 1 and the antenna conductor offers a large area, then a sufficient induced voltage is obtained to the reception signal.

12. 发明专利

JPS6232706A GROUND TYPE SMALL FOLDED ANTENNA SYSTEM 失效
公开(公告)号：JPS6232706A
公开(公告)日：1987-02-12
申请号：JP17118985
申请日：1985-08-05
申请人： YAGI ANTENNA , MITSUKAICHI MASASHI
发明人： TAKAHASHI AKIRA , MITSUKAICHI MASASHI
IPC分类号： H01Q9/26
摘要： PURPOSE:To stabilize impedance characteristics by arranging plural down leads for a grounded type folded antenna. CONSTITUTION:The down leads 25, 26 are suspended from the top of a metallic column 22 to both the sides through loading coils 23, 24. Each of the down leads 25, 26 are constituted of plural conductors 31 and their equivalent radius is approximately equal to the radius of the metallic column 22. Consequently, the input impedance observed from the transmitter 30 side is suppressed at about 100-j550(OMEGA) and matching with the 50OMEGA transmitter 30 can be easily obtained. Since the tow down leads 25, 26 are suspended, the variation ratio of antenna impedance is reduced to a half, and even at the high input impedance having its maximum efficiency, the impedance characteristics can be moreover stabilized by reaching the earth resistance of the ground 21 to zero. Consequent ly, the input impedance can be stabilized at the maximum efficience point of the antenna.

13. 发明专利

JPS626503A SYNTHESIZER FOR PLANE ANTENNA 失效
公开(公告)号：JPS626503A
公开(公告)日：1987-01-13
申请号：JP14393185
申请日：1985-07-02
申请人： YAGI ANTENNA
发明人： TAKAHASHI AKIRA
IPC分类号： H01Q13/18 , H01Q13/20 , H01Q19/10
摘要： PURPOSE:To decrease the attenuation in comparison with a coaxial cable and a strip line and to facilitate the processing by coupling a feeder to a dielectric line constituted by inserting a dielectric slub between a reflecting plate of a plane antenna and a metallic plate provided in parallel with the plate. CONSTITUTION:The dielectric slub 16 is fitted to the reflecting plate 15 of the plane antenna on the other side to a disc element 11. Further, a main feeder 13 is extracted at the side of the reflecting plate 15 via a through hole provided to a base 14 and coupled with the dielectric slub 16 by a coupler 17. An electromagnetic wave is polarized in parallel with the reflecting plate 15 and propagated along the dielectric slub 16. The metallic plate 18 whose cross section is a channel shape with a height lambdag/2 and length lambdao (lambdag is the propagation wavelength of the surface wave mode and lambdao is a wavelength of a plane electromagnetic wave in air) is fixed to the reflection plate 15 and the metallic plate 18 clips the dielectric slub 16 together with the reflection plate 15. Even when the U-shape metallic plate 18 is not shielded entirely, no radio wave is leaked and the processing is facilitated.

14. 发明专利

JPS619761B2 JPS619761B2 - 失效
公开(公告)号：JPS619761B2
公开(公告)日：1986-03-26
申请号：JP6836175
申请日：1975-06-06
申请人： Yagi Antenna
发明人： SEKIUCHI KAZUNORI , TAKAHASHI AKIRA
IPC分类号： H01P1/18 , H01P1/185 , H01P1/22 , H03H7/20 , H03H7/24
CPC分类号： H03H7/20

15. 发明专利

JPS6040724B2 失效
公开(公告)号：JPS6040724B2
公开(公告)日：1985-09-12
申请号：JP9246778
申请日：1978-07-31
申请人： YAGI ANTENNA
发明人： FUJITA RIKUO , SEKIUCHI KAZUNORI , TAKAHASHI AKIRA
IPC分类号： H04N5/21 , H01Q3/26 , H04B7/08

16. 发明专利

JPS60114005A ANTENNA MATCHING DEVICE 失效
公开(公告)号：JPS60114005A
公开(公告)日：1985-06-20
申请号：JP22182783
申请日：1983-11-25
申请人： YAGI ANTENNA
发明人： TAKAHASHI AKIRA , MINASE ATSUSHI
IPC分类号： H01Q1/00 , H03H7/40 , H04B1/04
摘要： PURPOSE:To execute efficient and stable operation by matching impedance based on a reflection coefficient calculated from a progressive and a reflected wave detected from a power fed to a transmission antenna even with the transmission antenna having a low antenna height and whose grounding is incomplete. CONSTITUTION:When a power from a communication equipment is fed to a feeding point 18, matching devices 21-23 match the input impedance of an antenna 15. The reflected wave from the feeding point 18 is fed to a directional coupler 24 via a matching device 25 and the progressive wave being the transmission power is fed to the antenna 15 via the matching device 25 from the directional coupler 24. The directional coupler 24 extracts separately a part of the progressive wave and the reflected wave respectively out of the power and transmits the result to an AD converter 27 via a prreamplifier 26. A CPU28 calculates the reflecting coefficient of the antenna 15 from each signal of the progressive wave and the reflected wave being digital quantity, changes the reactance of the matching device 25 by driving a motor M1 or M2 based on the calculated reflection coefficient so as to match the impedance.

17. 发明专利

JPS59177613A Information transmitting device of moving object tracking system 失效
标题翻译：移动物体跟踪系统的信息发送装置
公开(公告)号：JPS59177613A
公开(公告)日：1984-10-08
申请号：JP5328183
申请日：1983-03-29
申请人： Hitachi Kiden Kogyo Ltd , Toshihiro Tsumura , Yagi Antenna Co Ltd
发明人： TAKAHASHI AKIRA , MORIFUJI MOTOYOSHI , TSUMURA TOSHIHIRO , IMAMURA YOSHINOBU , KAMEI SHIGEKI , WARATANI HIROHARU
IPC分类号： G01S17/66 , G05D1/02
CPC分类号： G05D1/0234
摘要： PURPOSE:To transmit information efficiently and to prevent malfunctions by tracking a moving object running along a required path and irradiating it with an optical beam from a master station to transmit information. CONSTITUTION:An information signal 11 on the master station side is inputted to a signal processor 12 and is outputted to an optical modulator 13. This optical modulator 13 is connected directly to a driving device 14 and is so turned that a radiated optical beam 16 is always irradiated to a moving object 18 through a position detector 15 and an optical beam generator 17 which generates the radiated optical beam 16. The moving object 18 is provided with a reflector 19 which reflects the radiated optical beam in parallel, and the beam is reflected to the master station side as a reflected optical beam 20, and this beam 20 is inputted to said position detector 15 and is used as a position detection signal. Further, a part of the reflected optical beam 20 is branched by a splitter 21 and is converted photoelectrically by an optical demodulator, and the information signal 11 from the master station is outputted as an output signal 24 through an information processor 23.
摘要翻译：目的：有效传输信息，并通过跟踪沿所需路径运行的移动物体并用来自主站的光束照射信息来防止故障传输。构成：主站侧的信息信号11被输入到信号处理器12，并被输出到光调制器13.该光调制器13直接连接到驱动装置14，并被转动使得辐射光束16为总是通过位置检测器15和产生辐射光束16的光束发生器17照射到运动物体18.运动物体18设置有反射器19，反射器19平行地反射辐射的光束，并且光束被反射作为反射光束20到主站侧，并且该光束20被输入到所述位置检测器15，并被用作位置检测信号。此外，反射光束20的一部分由分光器21分支，并由光解调器进行光电转换，并且通过信息处理器23将来自主站的信息信号11作为输出信号24输出。

18. 发明专利

JPS5567253A SIGNAL TRANSMISSION UNIT 失效
公开(公告)号：JPS5567253A
公开(公告)日：1980-05-21
申请号：JP13987078
申请日：1978-11-15
申请人： HITACHI LTD , YAGI ANTENNA
发明人： MORIOKA MAKOTO , KURATA KAZUHIRO , KOGA YASUSHI , TAKAHASHI AKIRA , KOYAMA SATOSHI
IPC分类号： H04B10/00 , G02B7/00 , H04B10/11
摘要： PURPOSE:To improve the mobility of photography by making a signal transmission cable needless by transmitting signals from a vidicon, etc., as an infrared-ray light. CONSTITUTION:Signals from TV camera 1 pass through the signal line in support pipe 4 to operate light transmitter 2, and modulated infrared-ray light 3 is emitted from a LED. This light beam is condensed by condenser lens 5 of a light receiver and is converted to electric signals by PIN photo detector 6, and after that, this light beam is amplified by 7 and is supplied to VTR 8, etc. Further, a sure light transmission is performed by providing an automatic light tracking function in the light transmission system as well as the light receiving system.

19. 发明专利

JPS54149406A Device for controlling optical axis of information repeater using infrared rays 失效
标题翻译：用于控制使用红外线的信息重放器的光轴的装置
公开(公告)号：JPS54149406A
公开(公告)日：1979-11-22
申请号：JP5713678
申请日：1978-05-16
申请人： Yagi Antenna
发明人： KOYAMA SATOSHI , MORIFUJI MOTOYOSHI , TAKAHASHI AKIRA
IPC分类号： H04B10/11 , G01M11/00 , H04B10/00 , H04B10/032 , H04B10/077 , H04B10/112

20. 发明专利

JPS54127218A MEASURING INSTRUMENT FOR GHOSTTWAVE ARRIVAL DIRECTION 失效
公开(公告)号：JPS54127218A
公开(公告)日：1979-10-03
申请号：JP3421678
申请日：1978-03-27
申请人： JAPAN BROADCASTING CORP , YAGI ANTENNA
发明人： MORIFUJI MOTOYOSHI , TAKAHASHI AKIRA , MIYAZAWA HIROSHI , ENDOU YUKIO
IPC分类号： H04B1/10 , G01R29/00 , G01S3/34 , H04N17/00
摘要： PURPOSE:To obtain a ghost-wave-arrival-direction measuring instrument which can obtain accurately a ghost-wave arrival direction. CONSTITUTION:Fixed receiving antenna 1 and rotary receiving antenna 2 are arranged closely each other and antenna 1 is so directed that excellent reception will be made; and output signals of respective atennas 1 and 2 are processed by common local osillator 3, and a synchronizing signal of a desirable wave is extracted from the output of antenna 1 by synchronous separator circuit 4 and applied to delay-time setting circuit 5 to generate time pulses, which are used for synchronizing control of recorder 6. From the output of antenna 1, a carrier composed of the desirable wave and a ghost wave is sampled by carrier output circuit 7 and after its phase is shifted by phase converter circuit 8, the carrier is applied to synchronous detection circuit 9 together with the output of antenna 2 so as to attain synchronous detection of the ghost-wave output of antenna 2 by the carrier included in the output of antenna 1; and then, the desirable wave and ghost wave signal are converted into a pulse waveform by way of delay circuit 10 and differential amplifier 11 and delay- time fixing/sweep change-over switch S1 is switched to fixing side 1 making use of time pulses, so that sample holding will be done in circuit 12 with a specific delay time.

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