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1. 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。

2. 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。

3. 发明授权

US5142240A Amplifier circuit with correction of amplitude and phase distortions 失效
标题翻译：具有校正和相位失真校正的放大器电路
公开(公告)号：US5142240A
公开(公告)日：1992-08-25
申请号：US631502
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： H03F1/02 , H03F1/32 , H03F3/189 , H03F3/193
CPC分类号： H03F1/0227 , H03F1/3223
摘要： A high frequency amplifier circuit comprises an amplitude characteristic correction circuit and a phase characteristic correction circuit for compensating the non-linearity of the input-output characteristics of the amplifier. The amplitude characteristic correction circuit varies the drain voltage or the collector voltage of the amplifier in accordance with the envelope level of an input signal in such a manner that the relationship between the amplitude of the output of the amplifier and the amplitude of the input signal has linearity. On the other hand, the phase characteristic correction circuit provides a quantity of phase shift to the input signal in accordance with the envelope level of the input signal, and the phase-shifted input signal is applied to the amplifier in such a manner that the phase of the output of the amplifier and that of the input signal coincide with each other.
摘要翻译：高频放大器电路包括用于补偿放大器的输入 - 输出特性的非线性的幅度特性校正电路和相位特性校正电路。幅度特性校正电路根据输入信号的包络电平来改变放大器的漏极电压或集电极电压，使得放大器的输出的幅度与输入信号的幅度之间的关系具有线性度另一方面，相位特性校正电路根据输入信号的包络电平向输入信号提供一定量的相移，并且将相移输入信号以这样的方式施加到放大器：的放大器的输出和输入信号的输出相互重合。

4. 发明授权

US5093629A Amplifier circuit having second order signal cancellation 失效
标题翻译：具有二次信号消除的放大器电路
公开(公告)号：US5093629A
公开(公告)日：1992-03-03
申请号：US631845
申请日：1990-12-21
申请人： Gen Toyoshima , Yukio Ikeda , Noriharu Suematsu , Yoji Isota , Tadashi Takagi , Shuji Urasaki
发明人： Gen Toyoshima , Yukio Ikeda , Noriharu Suematsu , Yoji Isota , Tadashi Takagi , Shuji Urasaki
IPC分类号： H03F1/32
CPC分类号： H03F1/3223
摘要： An amplifier circuit suitable for use in various types of communication devices, radar systems and the like, wherein a fundamental-wave signal extracted from an input side is converted into a second order signal and the second order signal is shifted so as to be opposite in phase and equal in amplitude to a second order signal produced by an amplifier such as an FET or multistage operational amplifier. The phase shifted signal is applied to the amplifier output, whereby the second order signal produced by the amplifier can assuredly be equivalently short-circuited and the operation efficiency of the amplifier can be improved.
摘要翻译：一种适用于各种通信装置，雷达系统等的放大电路，其中从输入侧提取的基波信号被转换为二阶信号，并且第二级信号被移位以相对于相位等于由诸如FET或多级运算放大器的放大器产生的二阶信号。相位移信号被施加到放大器输出，由放大器产生的二阶信号可以确实等效地短路，并且可以提高放大器的工作效率。

5. 发明授权

US5151664A Low-distortion radio-frequency amplifying apparatus 失效
标题翻译：低失真无线电频率放大器
公开(公告)号：US5151664A
公开(公告)日：1992-09-29
申请号：US633950
申请日：1990-12-26
申请人： Noriharu Suematsu , Tadashi Takagi , Shuji Urasaki
发明人： Noriharu Suematsu , Tadashi Takagi , Shuji Urasaki
IPC分类号： H03F1/32 , H03F3/189 , H04L27/00
CPC分类号： H03F1/3247
摘要： A low-distortion radio-frequency amplifying apparatus is equipped with a distortion compensating circuit for generating a distortion signal which cancels a distortion generated during radio-frequency amplification. The apparatus detects a signal corresponding to an envelope power of the output or input of an amplifier, varies a distortion compensating characteristic according to the power value, and compensates a distortion over a wide dynamic range. The apparatus includes a detector for detecting an envelope detection signal of the amplifier, and a controller for compensating the distortion compensating characteristic according to the detected signal.

6. 发明授权

US5043673A Compensating circuit for a high frequency amplifier 失效
标题翻译：高频放大器的补偿电路
公开(公告)号：US5043673A
公开(公告)日：1991-08-27
申请号：US500960
申请日：1990-03-29
申请人： Noriharu Suematsu , Tadashi Takagi , Shuji Urasaki , Katsuhisa Uno , Masahiro Kamiyama
发明人： Noriharu Suematsu , Tadashi Takagi , Shuji Urasaki , Katsuhisa Uno , Masahiro Kamiyama
IPC分类号： H03F1/32 , H03F3/60
CPC分类号： H03F1/3223 , H03F3/602
摘要： A non-linearity compensating circuit for a high frequency amplifier includes a first divider for dividing a high frequency input signal into two signals, a distortion generating amplifier for non-linearly amplifying the first output of the first divider, a linear amplifier for linearly amplifying the second output from the first divider, a second divider for dividing the output of the linear amplifier into first and second signals, a first combiner for combining the output of the distortion generating amplifier with the first signal to extract the distortion component of the distortion generating amplifier, and a second combiner for combining the second signal with the distortion component.
摘要翻译：一种用于高频放大器的非线性补偿电路，包括用于将高频输入信号分成两个信号的第一分频器，用于非线性放大第一分频器的第一输出的失真发生放大器，用于线性放大第二分频器，用于将线性放大器的输出分为第一和第二信号;第一组合器，用于将失真发生放大器的输出与第一信号组合，以提取失真发生放大器的失真分量以及用于将第二信号与失真分量组合的第二组合器。

7. 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。

8. 发明授权

US5089790A Field effect transistor amplifier 失效
标题翻译：场效应晶体管放大器
公开(公告)号：US5089790A
公开(公告)日：1992-02-18
申请号：US575617
申请日：1990-08-31
申请人： Mitsuru Mochizuki , Youji Isota , Tadashi Takagi , Shuji Urasaki
发明人： Mitsuru Mochizuki , Youji Isota , Tadashi Takagi , Shuji Urasaki
IPC分类号： H03F3/193 , H03F3/60
CPC分类号： H03F3/1935
摘要： A field effect transistor amplifer has a high gain in a plurality of microwave frequency bands. In a field effect transistor with the gate terminal and the drain terminal thereof connected to a matching circuit on the input side and a matching circuit on the output side, respectively, a resonance circuit which is composed of a series circuit including at least one second inductor and a capacitor and connected in parallel to a resistor, is connected between at least one of the gate terminal of the field effect transistor and the ground and between the drain terminal of the field effect transistor and the ground. When a series circuit including the first inductor, at least one second inductor and the capacitor is resonated and short-circuited, the gain at the resonance frequency is dropped and a gain in the range outside of the desired bands is suppressed. When a series circuit including at least one second inductor and the capacitor and connected to the resistor is resonated and short-circuited, the drop of the gain at the resonance frequency due to the resistor is suppressed. This thereby enables high gains to be obtained in the desired bands.
摘要翻译：场效应晶体管放大器在多个微波频带中具有高增益。在其栅极端子和漏极端子分别连接到输入侧的匹配电路和输出侧的匹配电路的场效应晶体管中，分别由包括至少一个第二电感器的串联电路组成的谐振电路并且并联连接到电阻器的电容器连接在场效应晶体管的栅极端子和接地之间以及场效应晶体管的漏极端子与地之间的至少一个之间。当包括第一电感器，至少一个第二电感器和电容器的串联电路被谐振和短路时，谐振频率处的增益下降，并且抑制期望频带之外的范围内的增益。当包括至少一个第二电感器和电容器并且连接到电阻器的串联电路被谐振和短路时，由于电阻器而导致的谐振频率处的增益的下降被抑制。由此，能够获得期望频带的高增益。

9. 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。

10. 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。

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