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1. 发明授权

US4356494A Dual reflector antenna 失效
标题翻译：双反射天线
公开(公告)号：US4356494A
公开(公告)日：1982-10-26
申请号：US227902
申请日：1981-01-23
申请人： Takashi Katagi , Shuji Urasaki , Takashi Ebisui , Katsuhiko Aoki
发明人： Takashi Katagi , Shuji Urasaki , Takashi Ebisui , Katsuhiko Aoki
IPC分类号： H01Q19/18 , H01Q19/19
CPC分类号： H01Q19/19
摘要： An earth station antenna is employed for telecommunicating with a satellite in combination with an automatic tracking apparatus. The antenna is a dual reflector antenna which comprises a main reflector, a sub-reflector and a primary radiator, and the used frequency band of the antenna is at least 1.8 octaves. A parameter t of the antenna, defined by a configuration of the primary radiator is less than 0.3 at the lowest operating frequency. The phase center of the primary radiator, at a low frequency within the operating frequency range, is made to correspond with the focus of the sub-reflector.The above parameter t is defined by: ##EQU1## where: .lambda.: wavelength in free space,D.sub.h : aperture diameter of the primary radiator,L.sub.h : center axial length from the radiator apex to the radiator aperture plane, andL.sub.s : length from the radiator aperture plane to the bottom surface of the sub-reflector.
摘要翻译：采用地球站天线与卫星进行通信，结合自动跟踪装置。该天线是双反射器天线，其包括主反射器，副反射器和主辐射器，天线的使用频带为至少1.8倍。在最低工作频率下，由主辐射器的配置限定的天线的参数t小于0.3。初级辐射器在工作频率范围内的低频的相位中心与副反射器的焦点相对应。上述参数t由下式定义：其中：λ：自由空间中的波长，Dh：主辐射器的孔径，Lh：从散热器顶点到散热器孔径平面的中心轴向长度，Ls：来自散热器孔径平面到底部反射器的底面。

2. 发明授权

US5784034A Antenna apparatus 失效
标题翻译：天线装置
公开(公告)号：US5784034A
公开(公告)日：1998-07-21
申请号：US789685
申请日：1997-01-27
申请人： Yoshihiko Konishi , Masataka Ohtsuka , Yoshiyuki Chatani , Makoto Matsunaga , Shuji Urasaki , Takashi Katagi
发明人： Yoshihiko Konishi , Masataka Ohtsuka , Yoshiyuki Chatani , Makoto Matsunaga , Shuji Urasaki , Takashi Katagi
IPC分类号： H01Q21/08 , H01Q1/32 , H01Q1/36 , H01Q9/30 , H01Q9/32 , H01Q9/42 , H01Q11/08 , H01Q13/08 , H01Q21/00 , H01Q21/24 , H01Q21/29
CPC分类号： H01Q1/362 , H01Q21/29
摘要： Herein is revealed a helical antenna apparatus wherein the direction of beam radiation hardly changes even if the frequency in use changes. Two helical antennas which are wound with two conductive wires spirally, respectively, at equal intervals with a specified pitch .alpha. in the form of a cylinder are disposed along the length of the helical antennas so that the axes thereof substantially coincide with each other. By determining the lengths of the feeders of the respective helical antennas appropriately in order to set the phase of supplied power, it is possible to form the beam of signals radiated into space in the shape of conical beam having a directivity oriented obliquely upward. Additionally, it is possible to obtain the conical beam in which the direction of beam radiation does not change even if the frequency in use is changed.
摘要翻译：这里揭示了一种螺旋天线装置，其中即使所使用的频率发生变化，射束辐射的方向也几乎不变化。沿着螺旋天线的长度，以螺旋形的方式螺旋地缠绕有两个螺旋天线的两个螺旋天线分别以等间隔以特定的圆柱形形式的间距α设置，使得其轴线基本上彼此重合。通过适当地确定各个螺旋天线的馈线的长度以设定所提供的功率的相位，可以形成辐射到具有倾斜向上定向的锥形束形状的空间中的信号光束。此外，即使改变使用频率，也可以获得束辐射方向不变化的锥形束。

3. 发明授权

US6043776A Mobile satellite communication system 失效
标题翻译：移动卫星通信系统
公开(公告)号：US6043776A
公开(公告)日：2000-03-28
申请号：US33169
申请日：1998-03-02
申请人： Isamu Chiba , Takashi Katagi , Shuji Urasaki , Yoshihiko Konishi , Makoto Matsunaga , Akio Iso
发明人： Isamu Chiba , Takashi Katagi , Shuji Urasaki , Yoshihiko Konishi , Makoto Matsunaga , Akio Iso
IPC分类号： H04B7/26 , H04B7/185 , H04B7/204
CPC分类号： H04B7/2041
摘要： A mobile satellite communication system including an artificial satellite which is situated in a satellite orbit and develops an active phased array antenna so as to accomplish a line to a terrestrial station using a portable terminal in a specific area. As a result, a service that satisfies a demand for communication in the specific area can be realized.
摘要翻译：一种移动卫星通信系统，其包括位于卫星轨道中的人造卫星，并且开发有源相控阵天线，以便在特定区域中使用便携式终端完成到地面站的线路。结果，可以实现满足特定区域中的通信需求的服务。

4. 发明授权

US4618866A Dual reflector antenna system 失效
标题翻译：双反射天线系统
公开(公告)号：US4618866A
公开(公告)日：1986-10-21
申请号：US546048
申请日：1983-10-27
申请人： Shigeru Makino , Takashi Katagi , Shuji Urasaki , Shunichiro Kawabata , Yuji Kobayashi
发明人： Shigeru Makino , Takashi Katagi , Shuji Urasaki , Shunichiro Kawabata , Yuji Kobayashi
IPC分类号： H01Q19/17 , H01Q19/19 , H01Q25/00
CPC分类号： H01Q25/007 , H01Q19/192
摘要： An antenna system in which primary radiators are disposed on the radiation side of beams from a main reflector and in opposition to a subreflector and in which the subreflector and the primary radiators are disposed in positions offset from beam blocking positions.
摘要翻译：一种天线系统，其中一次辐射器设置在来自主反射器的光束的辐射侧并且与副反射器相对，并且其中副反射器和一次辐射器设置在偏离光束阻挡位置的位置。

5. 发明授权

US5966097A Antenna apparatus 失效
标题翻译：天线装置
公开(公告)号：US5966097A
公开(公告)日：1999-10-12
申请号：US856190
申请日：1997-05-14
申请人： Toru Fukasawa , Isamu Chiba , Tsutomu Endo , Shin-ichi Satoh , Shuji Urasaki
发明人： Toru Fukasawa , Isamu Chiba , Tsutomu Endo , Shin-ichi Satoh , Shuji Urasaki
IPC分类号： H01Q21/30 , H01Q1/38 , H01Q5/10 , H01Q9/30 , H01Q9/40 , H01Q9/42 , H01Q13/08 , H01Q19/00
CPC分类号： H01Q19/005 , H01Q5/378 , H01Q9/40 , H01Q9/42
摘要： A non-driven first linear element is disposed in the vicinity of an inverted-F second linear antenna element. The driven second linear element is disposed over a conductive plate having a flat shape, in such a manner as to be substantially parallel to the inverted-F antenna. The non-driven element has a short-circuited end of the inverted-F antenna, and has substantially the same resonant frequency as that of the inverted-F antenna.
摘要翻译：非驱动的第一线性元件设置在倒F型第二线性天线元件附近。被驱动的第二线性元件设置在具有平坦形状的导电板上，以使其基本上平行于倒F天线。非驱动元件具有倒F天线的短路端，并且具有与倒F天线基本相同的谐振频率。

6. 发明授权

US5160984A Amplifying feedback FET semiconductor element 失效
标题翻译：放大反馈FET半导体元件
公开(公告)号：US5160984A
公开(公告)日：1992-11-03
申请号：US732934
申请日：1991-07-19
申请人： Mitsuru Mochizuki , Tadashi Takagi , Shuji Urasaki
发明人： Mitsuru Mochizuki , Tadashi Takagi , Shuji Urasaki
IPC分类号： H03F1/34 , H03F1/48 , H03F3/193 , H03F3/60 , H03F3/68
CPC分类号： H03F3/193 , H03F1/34 , H03F3/604 , H03F2200/372
摘要： In an amplifying feedback-type FET semiconductor element for use as a wide-band microwave amplifier in telecommunications system such as a radar, a monolithic IC feedback circuit is located between at least two parallel FET cells of an FET semiconductor element and also between gate and drain lead electrodes of the FET semiconductor element. The feedback circuit includes at least two connecting lines and at least one passive element and is connected to the two lead electrodes. With this arrangement, it is possible to reduce the total length of said connecting lines to a minimum, thus guaranteeing a frequency characteristic showing a flat gain over a wide band.
摘要翻译：在用作诸如雷达的电信系统中的宽带微波放大器的放大反馈型FET半导体元件中，单片IC反馈电路位于FET半导体元件的至少两个并联FET单元之间，也位于栅极与 FET半导体元件的漏极引线电极。反馈电路包括至少两条连接线和至少一个无源元件，并连接到两个引线电极。通过这种布置，可以将所述连接线的总长度减小到最小，从而保证在宽带上显示平坦增益的频率特性。

7. 发明授权

US06222505B1 Composite antenna apparatus 失效
标题翻译：复合天线装置
公开(公告)号：US06222505B1
公开(公告)日：2001-04-24
申请号：US09308333
申请日：1999-05-19
申请人： Tsutomu Endo , Isamu Chiba , Masataka Ohtsuka , Yoshihiko Konishi , Shuji Urasaki
发明人： Tsutomu Endo , Isamu Chiba , Masataka Ohtsuka , Yoshihiko Konishi , Shuji Urasaki
IPC分类号： H01Q136
CPC分类号： H01Q21/30 , H01Q1/242 , H01Q1/243 , H01Q1/244 , H01Q5/35 , H01Q5/50 , H01Q9/30 , H01Q11/08 , H01Q21/29
摘要： A composite antenna apparatus comprising a balun connected to an inner conductor at the upper end of a coaxial line 11, one end of a helical element formed by a pair of wire conductors is connected to the balun, the other end is wound symmetrically around the coaxial line using the the coaxial line as a center so as to face the balun and is connected to the outer conductor 13 at the lower end of the coaxial line. The provision of an outer conductor connecting terminal connected to the outer conductor and an inner conductor connecting terminal connected to the inner conductor at the lower end of the coaxial line, allows the formation, on the same axis, of a helical antenna fed by the coaxial line via the helical element and a monopole antenna formed by the outer conductor of the coaxial line. Thereby equivalent gain in the horizontal plane and a reduction in the occupied volume is achieved.
摘要翻译：一种复合天线装置，包括连接到同轴线路11的上端的内导体的平衡 - 不平衡转换器，由一对线导体形成的螺旋形元件的一端连接到平衡 - 不平衡变换器，另一端围绕同轴线对称地卷绕使用同轴线作为中心，以面对平衡 - 不平衡变换器，并连接到同轴线下端的外导体13。设置连接到外导体的外导体连接端子和连接到同轴线下端的内导体的内导体连接端子允许在相同轴线上形成由同轴线馈送的螺旋天线经由螺旋元件的线和由同轴线的外导体形成的单极天线。因此，实现了水平面中的等效增益和占用体积的减小。

8. 发明授权

US5184093A Frequency synthesizer 失效
标题翻译：频率合成器
公开(公告)号：US5184093A
公开(公告)日：1993-02-02
申请号：US840937
申请日：1992-02-25
申请人： Kenji Itoh , Akio Iida , Shuji Urasaki
发明人： Kenji Itoh , Akio Iida , Shuji Urasaki
IPC分类号： H03L7/18 , H03L7/185
CPC分类号： H03L7/18 , H03L7/1806 , H03L7/185
摘要： A frequency synthesizer, including a direct digital synthesizer (DDS) for providing wave amplitude data as a standard signal source, and a phase lock loop for comparing a branched synthesizer frequency with the standard signal source at a phase comparator. A frequency converter converts the output frequency of the DDS to a higher frequency and provides the resultant higher frequency to the phase comparator in the phase loop. A small loop dividing ratio is obtained by converting the low frequency of the DDS to a higher frequency. A spurious of the synthesizer output signal is reduced and provides a low power consumption apparatus.
摘要翻译：一种频率合成器，包括用于提供波幅数据作为标准信号源的直接数字合成器（DDS）和用于在分相合成器频率与相位比较器上的标准信号源进行比较的锁相环。变频器将DDS的输出频率转换为更高的频率，并在相位环路中将相应的较高频率提供给相位比较器。通过将DDS的低频转换为更高的频率来获得小的环路分频比。减少合成器输出信号的杂散，并提供低功耗设备。

9. 发明授权

US5101172A Linear amplifier 失效
标题翻译：线性放大器
公开(公告)号：US5101172A
公开(公告)日：1992-03-31
申请号：US630474
申请日：1990-12-19
申请人： Yukio Ikeda , Gen Toyoshima , Noriharu Suematsu , Yoji Isota , Tadashi Takagi , Shuji Urasaki
发明人： Yukio Ikeda , Gen Toyoshima , Noriharu Suematsu , Yoji Isota , Tadashi Takagi , Shuji Urasaki
IPC分类号： H03F1/02 , H03F1/32 , H03F3/189
CPC分类号： H03F1/3247 , H03F1/0238 , H03F1/3282 , H03F2200/102 , H03F2200/438
摘要： A linear amplifier includes a variable attenuator and a phase shifter for modifying the amplitude and phase of an input signal to compensate for amplitude and phase distortion caused by non-linear characteristics of a high-powered amplifier utilized in a microwave band communications system. An amplitude comparator and a phase comparator compare the amplitudes and phases of input and output signals of the linear amplifier circuit to develop control signals for controlling the operation of the variable attenuator and phase shifter. The elimination of digital signal processing circuitry allows increased speed of operation that is essential for use in the microwave bands.
摘要翻译：线性放大器包括可变衰减器和移相器，用于修改输入信号的幅度和相位，以补偿由微波频带通信系统中使用的高功率放大器的非线性特性引起的幅度和相位失真。振幅比较器和相位比较器比较线性放大器电路的输入和输出信号的幅度和相位，以产生用于控制可变衰减器和移相器的操作的控制信号。数字信号处理电路的消除允许增加在微波带中使用所必需的操作速度。

10. 发明授权

US5093637A Modulation device with input signal modification for correction of amplifier nonlinearities 失效
标题翻译：具有输入信号修正的调制器件，用于校正放大器非线性
公开(公告)号：US5093637A
公开(公告)日：1992-03-03
申请号：US631506
申请日：1990-12-21
申请人： Yoji Isota , Gen Toyoshima , Noriharu Suematsu , Yukio Ikeda , Tadashi Takagi , Shuji Urasaki
发明人： Yoji Isota , Gen Toyoshima , Noriharu Suematsu , Yukio Ikeda , Tadashi Takagi , Shuji Urasaki
IPC分类号： H04L27/36 , H03C3/02 , H03C3/08 , H03F1/32 , H04L27/01 , H04L27/20
CPC分类号： H03F1/3247 , H03C3/08 , H03F1/3288 , H04L27/2071 , H03C3/02 , H03F2200/102 , H03F2201/3227 , H03F2201/3233
摘要： In a modulation system using an amplitude and a phase of a carrier wave as information such as a QPSK system, a modulation device modifies an input signal series to compensate the nonlinear characteristics of an amplifier located at a later stage, and provides a carrier wave modulated by the modified signal series to the amplifier. A first arithmetic circuit obtains an amplitude and a phase of an input signal by calculation. A ROM is set with correction data corresponding to the calculated amplitude so as to compensate the nonlinearity of the amplifier. A modification value generating circuit and a RAM output an amount of compensation so as to further modify the correction data according to part of an output signal from the amplifier to compensate amplifier characteristic changes due to temperature variations and the like. A second arithmetic circuit provides a signal series produced from the modified amplitude and phase to a quadrature modulator.
摘要翻译：在使用载波的振幅和相位作为诸如QPSK系统的信息的调制系统中，调制装置修改输入信号序列以补偿位于后期的放大器的非线性特性，并提供载波调制通过改进的信号系列到放大器。第一算术电路通过计算获得输入信号的振幅和相位。 ROM设置有与所计算的幅度对应的校正数据，以补偿放大器的非线性。修改值产生电路和RAM输出补偿量，以便根据来自放大器的输出信号的一部分进一步修改校正数据，以补偿由于温度变化等引起的放大器特性变化。第二运算电路提供从修正的幅度和相位产生的信号到正交调制器。

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