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    • 2. 发明授权
    • Transmitting-receiving module of radar system
    • 雷达系统的发射接收模块
    • US07436353B2
    • 2008-10-14
    • US11509765
    • 2006-08-25
    • Haruo Kojima
    • Haruo Kojima
    • G01S7/02G01S13/00
    • G01S7/034
    • A transmitting-receiving module of a radar system which is an embodiment of the present invention, includes, a transmitting circuit for sending transmitting RF signal, a three terminal circulator having three terminals and with the first terminal of which is connected a transmitting-receiving antenna, a first RF switch which is connected with the second terminal of the three terminal circulator and the output can be switched over, a second RF switch with input which can be switched over, an attenuator connected between the first RF switch and the second switch, and a receiving circuit connected with the output terminal of the second RF switch, when radar signal is being transmitted, the first RF switch is connected with the attenuator, and the second RF switch is not connected with the attenuator, when radar signal is being received, the first RF switch is connected with the second RF switch directly or connected through a low noise amplifier.
    • 作为本发明的实施例的雷达系统的发送接收模块包括:发送发送RF信号的发送电路,具有三个终端的三端环行器,其第一端连接有发送接收天线 可以将与三端环行器的第二端连接的第一RF开关和输出切换,具有能切换的输入的第二RF开关,连接在第一RF开关和第二开关之间的衰减器, 以及与所述第二RF开关的输出端子连接的接收电路,当正在发送雷达信号时,当接收到雷达信号时,所述第一RF开关与所述衰减器连接,并且所述第二RF开关不与所述衰减器连接 ,第一RF开关直接与第二RF开关连接或通过低噪声放大器连接。
    • 3. 发明授权
    • Limiter circuit
    • 限制器电路
    • US07009462B2
    • 2006-03-07
    • US10785064
    • 2004-02-25
    • Haruo Kojima
    • Haruo Kojima
    • H01P1/22
    • H01P1/227
    • A limiter circuit comprises a quarter-wave transmission line, a first limiter element, a first DC return element, a second limiter element and a second DC return element. The quarter-wave transmission line, which has a predetermined characteristic impedance, comprises a signal line conductor and a common line conductor. The first limiter element is connected through a termination between the signal line conductor and the common line conductor at one side of the transmission line. The first DC return element is connected in parallel with the first limiter element. The second limiter element is connected between the signal line conductor and the common line conductor at another side of the transmission line. The second DC return element is connected to in parallel with the second limiter element.
    • 限幅器电路包括四分之一波长传输线,第一限幅元件,第一直流返回元件,第二限幅元件和第二直流返回元件。 具有预定特性阻抗的四分之一波长传输线包括信号线导体和公共线导体。 第一限幅器元件通过信号线导体和传输线一侧的公共线路导体之间的端接连接。 第一直流返回元件与第一限幅元件并联连接。 第二限制器元件连接在信号线导体和传输线另一侧的公共线路导体之间。 第二直流返回元件与第二限幅元件并联连接。
    • 5. 发明授权
    • Pulse electric power amplification apparatus
    • 脉冲电力放大装置
    • US08581664B2
    • 2013-11-12
    • US13331492
    • 2011-12-20
    • Haruo Kojima
    • Haruo Kojima
    • H03G9/00H03F3/04H03F3/72
    • H03F3/72H03F2200/405H03F2203/7227
    • A pulse electric power amplification apparatus includes first, second, final-stage and drive amplification devices. In initial stage, the first device in upstream, having a predetermined thermal time constant, receives a high frequency signal while the second device in downstream, having a different thermal time constant, is cascade-connected to it. In final stage, the drive device drives the final-stage device in downstream, which is cascade-connected to the second device. The apparatus further includes a power supply switching circuit, first and second differentiating circuits. The first and second differentiating circuits, having time constants corresponding to thermal time constants of the first and second devices, respectively, receive a pulse signal with which the high frequency signal is modulated. The power supply switching circuit, also receiving the pulse signal, switches a voltage outputted from a positive bias power supply and inputs the switched voltage to the first, second, drive and final-stage devices.
    • 脉冲电力放大装置包括第一,第二,末级和驱动放大装置。 在初始阶段,具有预定的热时间常数的上游的第一设备接收高频信号,而具有不同热时间常数的下游的第二设备与其级联连接。 在最后阶段,驱动装置驱动下游的最后级装置,该下级装置级联连接到第二装置。 该装置还包括电源开关电路,第一和第二微分电路。 具有分别对应于第一和第二装置的热时间常数的时间常数的第一和第二微分电路接收高频信号被调制的脉冲信号。 也接收脉冲信号的电源开关电路切换从正偏置电源输出的电压,并将切换的电压输入到第一,第二驱动和最后级装置。
    • 6. 发明申请
    • Transmitting-receiving module of radar system
    • 雷达系统的发射接收模块
    • US20070115170A1
    • 2007-05-24
    • US11509765
    • 2006-08-25
    • Haruo Kojima
    • Haruo Kojima
    • H04B7/00G01S1/00G01S3/00G01S5/00
    • G01S7/034
    • A transmitting-receiving module of a radar system which is an embodiment of the present invention, includes, a transmitting circuit for sending transmitting RF signal, a three terminal circulator having three terminals and with the first terminal of which is connected a transmitting-receiving antenna, a first RF switch which is connected with the second terminal of the three terminal circulator and the output can be switched over, a second RF switch with input which can be switched over, an attenuator connected between the first RF switch and the second switch, and a receiving circuit connected with the output terminal of the second RF switch, when radar signal is being transmitted, the first RF switch is connected with the attenuator, and the second RF switch is not connected with the attenuator, when radar signal is being received, the first RF switch is connected with the second RF switch directly or connected through a low noise amplifier.
    • 作为本发明的实施例的雷达系统的发送接收模块包括:发送发送RF信号的发送电路,具有三个终端的三端环行器,其第一端连接有发送接收天线 可以将与三端环行器的第二端连接的第一RF开关和输出切换,具有能切换的输入的第二RF开关,连接在第一RF开关和第二开关之间的衰减器, 以及与所述第二RF开关的输出端子连接的接收电路,当正在发送雷达信号时,当接收到雷达信号时,所述第一RF开关与所述衰减器连接,并且所述第二RF开关不与所述衰减器连接 ,第一RF开关直接与第二RF开关连接或通过低噪声放大器连接。
    • 7. 发明申请
    • Limiter circuit
    • 限制器电路
    • US20050024159A1
    • 2005-02-03
    • US10785064
    • 2004-02-25
    • Haruo Kojima
    • Haruo Kojima
    • H01P1/00H01P1/22H03G11/00H03G11/02
    • H01P1/227
    • A limiter circuit comprises a quarter-wave transmission line, a first limiter element, a first DC return element, a second limiter element and a second DC return element. The quarter-wave transmission line, which has a predetermined characteristic impedance, comprises a signal line conductor and a common line conductor. The first limiter element is connected through a termination between the signal line conductor and the common line conductor at one side of the transmission line. The first DC return element is connected in parallel with the first limiter element. The second limiter element is connected between the signal line conductor and the common line conductor at another side of the transmission line. The second DC return element is connected to in parallel with the second limiter element.
    • 限幅器电路包括四分之一波长传输线,第一限幅器元件,第一直流返回元件,第二限幅元件和第二直流返回元件。 具有预定特性阻抗的四分之一波长传输线包括信号线导体和公共线导体。 第一限幅器元件通过信号线导体和传输线一侧的公共线路导体之间的端接连接。 第一直流返回元件与第一限幅元件并联连接。 第二限制器元件连接在信号线导体和传输线另一侧的公共线路导体之间。 第二直流返回元件与第二限幅元件并联连接。
    • 9. 发明授权
    • Semiconductor amplifier
    • 半导体放大器
    • US07423491B2
    • 2008-09-09
    • US11742263
    • 2007-04-30
    • Haruo Kojima
    • Haruo Kojima
    • H03F1/52
    • H03F1/52H03F1/523H03F2200/75
    • A first power source 11 for supplying a bias voltage to a gate electrode G of a field effect transistor 13, which amplifies high-frequency signals, and a second power source 15 for supplying a bias voltage to a drain electrode D of the field effect transistor 13 are provided. The protective resistance 12 is connected between the gate electrode G of the field effect transistor 13 and the first power source 11, and the bias voltage controller 14 is connected between the drain electrode D of the field effect transistor 13 and the second power source 11. Further, a voltage detector 16 is connected between both ends of the protective resistance 12 to detect a voltage drop generated between both ends of the protective resistance 12, when a rectified current flows to the gate electrode G from the drain electrode D of the field effect transistor 13.
    • 用于向放大高频信号的场效应晶体管13的栅电极G提供偏置电压的第一电源11和用于向场效应晶体管的漏电极D提供偏置电压的第二电源15 13。 保护电阻12连接在场效应晶体管13的栅电极G和第一电源11之间,偏置电压控制器14连接在场效应晶体管13的漏电极D和第二电源11之间。 此外,当整流的电流从场效应的漏电极D流到栅电极G时,电压检测器16连接在保护电阻12的两端之间,以检测保护电阻12的两端之间产生的电压降 晶体管13。
    • 10. 发明授权
    • Semiconductor amplifier
    • 半导体放大器
    • US07262668B2
    • 2007-08-28
    • US11148168
    • 2005-06-09
    • Haruo Kojima
    • Haruo Kojima
    • H03F1/52
    • H03F1/52H03F1/523H03F2200/75
    • A first power source 11 for supplying a bias voltage to a gate electrode G of a field effect transistor 13, which amplifies high-frequency signals, and a second power source 15 for supplying a bias voltage to a drain electrode D of the field effect transistor 13 are provided. The protective resistance 12 is connected between the gate electrode G of the field effect transistor 13 and the first power source 11, and the bias voltage controller 14 is connected between the drain electrode D of the field effect transistor 13 and the second power source 11. Further, a voltage detector 16 is connected between both ends of the protective resistance 12 to detect a voltage drop generated between both ends of the protective resistance 12, when a rectified current flows to the gate electrode G from the drain electrode D of the field effect transistor 13.
    • 用于向放大高频信号的场效应晶体管13的栅电极G提供偏置电压的第一电源11和用于向场效应晶体管的漏电极D提供偏置电压的第二电源15 13。 保护电阻12连接在场效应晶体管13的栅电极G和第一电源11之间,偏置电压控制器14连接在场效应晶体管13的漏电极D和第二电源11之间。 此外,当整流的电流从场效应的漏电极D流到栅电极G时,电压检测器16连接在保护电阻12的两端之间,以检测保护电阻12的两端之间产生的电压降 晶体管13。