公开(公告)号：US4853702A

公开(公告)日：1989-08-01

申请号：US743883

申请日：1985-06-12

申请人： Takayasu Shiokawa ,  Koji Yasukawa ,  Yoshio Karasawa

发明人： Takayasu Shiokawa ,  Koji Yasukawa ,  Yoshio Karasawa

IPC分类号： H01Q21/29 ,  H04B7/00 ,  H04B7/08 ,  H04B7/10

CPC分类号： H01Q21/29 ,  H04B7/086 ,  H04B7/10

摘要： A radio wave receiving system comprises an antenna having at least two antenna elements, a phase shifter connected to at least one of the antenna elements, and a combiner for combining signals passed through the phase shifter and other signals not passed through the phase shifter. Through proper control of the mutual phase difference between signals from the aforementioned antenna elements by using the phase shifter, the system alters the polarization characteristic of the antenna in the direction of incidence of undesired reflected waves and consequently supresses the fading due to undesired reflected waves.

摘要翻译： 无线电波接收系统包括具有至少两个天线元件的天线，连接到至少一个天线元件的移相器和用于组合通过移相器的信号和未通过移相器的其它信号的组合器。 通过使用移相器适当地控制来自上述天线元件的信号之间的相互相位差，该系统在不期望的反射波的入射方向上改变天线的偏振特性，并因此抑制由于不期望的反射波引起的衰落。

公开(公告)号：US5493436A

公开(公告)日：1996-02-20

申请号：US408325

申请日：1995-03-21

申请人： Yoshio Karasawa ,  Takashi Matsudo ,  Hisato Iwai ,  Takayasu Shiokawa

发明人： Yoshio Karasawa ,  Takashi Matsudo ,  Hisato Iwai ,  Takayasu Shiokawa

IPC分类号： H04B10/11 ,  H04B7/26 ,  H04B10/032 ,  H04B10/07 ,  H04B10/112 ,  H04B10/22 ,  H04B10/10

CPC分类号： H04B10/1125 ,  H04B10/25759

摘要： A system for communicating between mobile units and an exchange station, with a radio frequency signal, in which an electric signal from a telephone exchange of the telephone station is converted into an optical signal with an electricity-to-light converter. The optical signal is carried via an optical fiber cable to a transmission communication antenna for emission, with amplification of the optical signal if necessary. The emitted signal is received by a receiving communication antenna, amplified with an optical amplifier if necessary, and converted to an electric signal with a light-to-electricity converter.

摘要翻译： 一种用于在移动单元和具有射频信号的交换站之间进行通信的系统，其中来自电话台的电话交换机的电信号被转换成具有电 - 光转换器的光信号。 光信号通过光纤电缆传送到用于发射的传输通信天线，如果需要则放大光信号。 发射信号由接收通信天线接收，如果需要用光放大器放大，并用光 - 电转换器转换成电信号。

公开(公告)号：US4400703A

公开(公告)日：1983-08-23

申请号：US269452

申请日：1981-06-02

申请人： Takayasu Shiokawa ,  Yoshio Karasawa

发明人： Takayasu Shiokawa ,  Yoshio Karasawa

IPC分类号： H01Q21/24 ,  H01Q11/08 ,  H01Q21/06 ,  H01Q21/28

CPC分类号： H01Q21/067 ,  H01Q11/08

摘要： A compact and light weight array antenna with a gain of approximately 13 dB comprises a plurality of axial-mode helical antennas with an antenna height of 0.4.about.0.6.lambda. (.lambda.: Wavelength) as element antennas, having cylindrical metallic rims with a rim height of approximately 0.25.lambda. surrounding each corresponding element antenna in order to suppress the characteristic degradation of the device caused by the mutual coupling of element antennas.

摘要翻译： 具有大约13dB的增益的紧凑且重量轻的阵列天线包括具有作为元件天线的天线高度为0.4λ（λ：波长）的多个轴向模式螺旋天线，具有圆柱形金属边缘，边缘高度为 大约0.25λ围绕每个对应的元件天线，以便抑制由元件天线的相互耦合引起的器件的特性劣化。

公开(公告)号：US5585803A

公开(公告)日：1996-12-17

申请号：US521068

申请日：1995-08-29

申请人： Ryu Miura ,  Toyohisa Tanaka ,  Yoshio Karasawa ,  Isamu Chiba

发明人： Ryu Miura ,  Toyohisa Tanaka ,  Yoshio Karasawa ,  Isamu Chiba

IPC分类号： H01Q3/26 ,  H01Q3/22

CPC分类号： H01Q3/26

摘要： In an apparatus and method for controlling an array antenna comprising a plurality of antenna elements arranged so as to be adjacent to each other in a predetermined arrangement configuration, a plurality of received signals received by the antenna elements is transformed into respective pairs of quadrature baseband signals, using a common local oscillation signal, wherein each pair of quadrature baseband signals is orthogonal to each other. Then predetermined first and second data are calculated based on each pair of transformed quadrature baseband signals, and are filtered using a noise suppressing filter. Respective elements of a transformation matrix for in-phase combining are calculated based on the filtered first and second data, and the received signals obtained from the each two antenna elements are put in phase based on the calculated transformation matrix. Thereafter, a plurality of received signals which are put in phase are combined in phase, and an in-phase combined received signal is outputted.

摘要翻译： 在一种用于控制阵列天线的装置和方法中，包括以预定布置配置彼此相邻布置的多个天线元件，由天线元件接收的多个接收信号被变换成相应的正交基带信号对 使用公共的本地振荡信号，其中每对正交基带信号彼此正交。 然后，基于每对变换的正交基带信号计算预定的第一和第二数据，并使用噪声抑制滤波器进行滤波。 基于滤波的第一和第二数据计算用于同相组合的变换矩阵的相应元素，并且基于所计算的变换矩阵将从每个两个天线元件获得的接收信号置于同相中。 此后，相位合并的多个接收信号被同相组合，并输出同相组合的接收信号。

公开(公告)号：US06232927B1

公开(公告)日：2001-05-15

申请号：US09251327

申请日：1999-02-17

申请人： Takashi Inoue ,  Yoshio Karasawa

发明人： Takashi Inoue ,  Yoshio Karasawa

IPC分类号： H01Q2100

CPC分类号： H04B1/7115 ,  H01Q21/08

摘要： An array antenna apparatus for use in spread spectrum communications is provided including a plurality of antenna elements aligned on a straight line. The array antenna apparatus is used in a receiving station for receiving spread-spectrum modulated radio signals having a wavelength of a predetermined carrier frequency transmitted from transmitting stations using a two-dimensional RAKE receiving method, and for performing spread spectrum communications in code division multiple access. The plurality of antenna elements are aligned such that an interval between antenna elements adjacent to each other among the plurality of antenna elements is set to a value which is larger than one half the wavelength of the carrier frequency and which is equal to or smaller than sixteen times the wavelength of the carrier frequency so as to generate grating lobes. In this case, the interval is preferably set to a value which is an integer or fractional (decimal) multiple of one half the wavelength of the carrier frequency which is greater than unity.

摘要翻译： 提供了一种用于扩频通信的阵列天线装置，其包括在直线上对准的多个天线元件。 阵列天线装置用于接收站，用于接收使用二维RAKE接收方法从发射站发送的具有预定载波频率的波长的扩频调制无线电信号，并用于在码分多址中进行扩频通信 。 多个天线元件对准，使得多个天线元件之间彼此相邻的天线元件之间的间隔被设置为大于载波频率的波长的一半的值，并且等于或小于16 乘以载波频率的波长，以便产生栅瓣。 在这种情况下，间隔优选设定为大于1的载波频率的波长的一半的整数或分数（十进制）倍数的值。

公开(公告)号：US5473333A

公开(公告)日：1995-12-05

申请号：US368633

申请日：1995-01-04

申请人： Isamu Chiba ,  Ryu Miura ,  Yoshio Karasawa

发明人： Isamu Chiba ,  Ryu Miura ,  Yoshio Karasawa

IPC分类号： H01Q3/26 ,  H01Q25/00 ,  H04B7/08 ,  G01S3/16 ,  G01S3/28

CPC分类号： H01Q3/2605 ,  H01Q25/00

摘要： In an apparatus for adaptively controlling an array antenna of M antenna elements, a multi-beam forming circuit calculates N beam field strengths in a known manner, and a beam selecting circuit selectively outputs beam field strengths not smaller than a predetermined threshold value by comparing the N beam field strengths with the threshold value. At least two adaptive control processors calculate N weight coefficients corresponding to N beams according to a constant modulus algorithm, respectively multiplies the calculated beam field strengths by the calculated N weight coefficients, and combines in phase respective signals of multiplication results, outputting the combined signal as a reception signal. In an initial state of one adaptive control processor, a weight coefficient thereof corresponding to the maximum beam field strength is set to a predetermined initial value not zero, and weight coefficients corresponding to the other beam field strengths are set to zero. In an initial state of the other adaptive control processor, a weight coefficient of the other adaptive control processor corresponding to at least a beam field strength having the second greater level is set to the initial value, and weight coefficients corresponding to the other beam field strengths is set to zero.

摘要翻译： 在用于自适应地控制M个天线元件的阵列天线的装置中，多波束形成电路以已知的方式计算N波束场强度，并且波束选择电路通过比较不同于预定阈值的波束场强 N光束场强与阈值。 至少两个自适应控制处理器根据恒模算法计算对应于N个波束的N个权重系数，分别将计算的波束场强度乘以所计算的N个加权系数，并且将乘法结果的相位信号合并，输出组合信号为 接收信号。 在一个自适应控制处理器的初始状态下，将与最大波束场强度相对应的加权系数设置为预定的初始值不为零，并将与其他波束场强对应的加权系数设置为零。 在另一个自适应控制处理器的初始状态下，对应于至少具有第二较大电平的波束场强度的其他自适应控制处理器的加权系数被设置为初始值，并且对应于另一个光束场强的加权系数 设置为零。

公开(公告)号：US06317253B1

公开(公告)日：2001-11-13

申请号：US08871064

申请日：1997-07-09

申请人： Tetsuya Miyazaki ,  Yoshio Karasawa ,  Minoru Yoshida ,  Toshikazu Gozen

发明人： Tetsuya Miyazaki ,  Yoshio Karasawa ,  Minoru Yoshida ,  Toshikazu Gozen

IPC分类号： H01S300

CPC分类号： H01S3/06754 ,  H01S3/1611 ,  H01S3/1693 ,  H01S3/1695 ,  H01S2302/00 ,  H01S2303/00

摘要： In an optical amplifier apparatus for amplifying an incident signal light having wavelengths of 1.06 &mgr;m band, a first optical isolator makes an incident signal light pass therethrough in one direction from an input end to an output end. An optical fiber includes a core mainly composed of silica glass and doped with a predetermined rare-earth element and the other elements, and a cladding of silica glass, and transfers in a single mode the signal light output from the first optical isolator. An optical multiplexer multiplexes an excitation light having an excitation wavelength of 0.8 &mgr;m band with the signal light transferred by the optical fiber, by outputting the excitation light to the optical fiber, and further transfers and outputs the signal light having wavelengths of 1.06 &mgr;m band amplified by induced emission in the optical fiber due to the rare-earth element excited by the excitation light. Further, a second optical isolator makes the signal light outputted from the optical multiplexer pass therethrough in one direction from an input end thereof to an output end thereof, and outputs the signal light as an amplified signal light.

摘要翻译： 在用于放大波长为1.06μm波段的入射信号光的光放大器装置中，第一光隔离器使入射信号光从输入端到输出端沿一个方向通过。 光纤包括主要由石英玻璃构成并掺杂有预定稀土元素的核心和其它元素以及石英玻璃的包层，并且以单一模式传输从第一光隔离器输出的信号光。 光复用器通过向光纤输出激发光，将具有0.8μm波段的激发波长的激发光与由光纤传输的信号光复用，并且进一步传输和输出波长为1.06μm波段的信号光放大 由于由激发光激发的稀土元素引起的光纤中的感应发射。 此外，第二光隔离器使得从光复用器输出的信号光从其输入端到其输出端在一个方向通过，并输出信号光作为放大信号光。

公开(公告)号：US5204981A

公开(公告)日：1993-04-20

申请号：US663404

申请日：1991-03-01

申请人： Yoshio Karasawa ,  Masayuki Yasunaga ,  Hisato Iwai

发明人： Yoshio Karasawa ,  Masayuki Yasunaga ,  Hisato Iwai

IPC分类号： H04B7/08 ,  H04B7/155 ,  H04L1/06

CPC分类号： H04B7/086

摘要： Accordingly to the present invention, when an incidence angle of a direct wave or a satellite elevation angle reaches a predetermined value, signals from two (or more) antennas, which are disposed at positions where variations in the field intensities of radio waves recevied by the two antennas are negatively correlated (i.e. when the received signal level of one of them is low, the received signal level of the other is high) or uncorrelated (i.e. the variations are not related to each other), are successively or discretely switched at a suitable switching period, by which burst-like errors are spread with time to perform the de-interleave or interleave function in decoding transmitted signals.

摘要翻译： 根据本发明，当直接波或卫星仰角的入射角达到预定值时，来自两个（或更多个）天线的信号被设置在由该天线接收的无线电波的场强度的变化的位置处 两个天线是负相关的（即当其中一个的接收信号电平低，另一个的接收信号电平高）或不相关（即，变化彼此不相关）时，在一个 合适的切换周期，突发式错误随时间扩展以在解码发送信号中执行去交织或交织功能。

公开(公告)号：US5347535A

公开(公告)日：1994-09-13

申请号：US25659

申请日：1993-03-03

申请人： Yoshio Karasawa ,  Hisato Iwai

发明人： Yoshio Karasawa ,  Hisato Iwai

IPC分类号： H04B7/02 ,  H04B7/08 ,  H04B7/26 ,  H04B10/00 ,  H04B10/80 ,  H04Q7/36 ,  H04B7/04

CPC分类号： H04B7/0894

摘要： A CDMA communication system using a spreading code has a plurality of mobile stations and at least one base station. The mobile stations and the base station are provided with respective receiving sections, each of which has a path diversity function for reducing multipath fading. The base station includes an array antenna having a plurality of integrated antenna elements spaced by a distance substantially equal to one to several wavelengths from each other so as to produce a space diversity effect. A plurality of delay devices are coupled with the respective antenna elements, for applying time delays to signals which pass through the respective antenna elements. The time delay are different from each other by a one symbol period of the spreading code or more.

摘要翻译： 使用扩展码的CDMA通信系统具有多个移动站和至少一个基站。 移动站和基站设置有各自的接收部分，每个接收部分具有用于减少多径衰落的路径分集功能。 该基站包括阵列天线，该阵列天线具有彼此间隔大约等于一至几个波长的距离的多个集成天线元件，以产生空间分集效应。 多个延迟装置与相应的天线元件耦合，以对通过各个天线元件的信号施加时间延迟。 时间延迟彼此相差扩展码的一个符号周期或更多。

公开(公告)号：US06106176A

公开(公告)日：2000-08-22

申请号：US257856

申请日：1999-02-25

申请人： Shigekazu Yanagisawa ,  Yoshio Karasawa ,  Kenji Watanabe ,  Tomoyuki Ichikawa ,  Kenichi Tanabe ,  Rie Sudo

发明人： Shigekazu Yanagisawa ,  Yoshio Karasawa ,  Kenji Watanabe ,  Tomoyuki Ichikawa ,  Kenichi Tanabe ,  Rie Sudo

IPC分类号： B41J3/36 ,  B41J2/51 ,  B41J3/407 ,  B41J11/42 ,  B41J11/66 ,  B41J19/20 ,  B41J29/393 ,  B41J11/26

CPC分类号： B41J29/393 ,  B41J19/202 ,  B41J3/4075

摘要： There are provided a method and apparatus for printing a print image on a print material by using a print head based on dot information of the print image by causing at least one of the print head and the print material to move to thereby effect relative motion between the print head and the print material at a relative speed dependent on a rotational speed of a DC motor as a drive source. Driving of the DC motor and the print head is controlled for printing of the print image. A distance from a predetermined length start position selected from a front end position, a print start position, and a print end position of the print material to a predetermined length end position at which the relative motion is to be terminated, is set to a predetermined length. Braking of the DC motor is controlled by varying a braking load on the DC motor in dependence on the relative speed and the predetermined length so as to terminate the relative motion at the predetermined length end position.

摘要翻译： 提供了一种方法和装置，用于通过使打印头和打印材料中的至少一个移动从而通过使用基于打印图像的点信息的打印头在打印材料上打印打印图像，从而实现打印头之间的相对运动 打印头和打印材料以相对速度取决于作为驱动源的DC电动机的转速。 控制直流电动机和打印头的驱动以打印打印图像。 从打印材料的前端位置，打印开始位置和打印结束位置到相对运动要终止的预定长度结束位置的预定长度开始位置的距离设定为预定长度开始位置 长度。 通过根据相对速度和预定长度改变直流电动机上的制动负荷来控制直流电动机的制动，从而终止预定长度结束位置处的相对运动。