High frequency power amplifier with high efficiency and low distortion
    121.
    发明授权
    High frequency power amplifier with high efficiency and low distortion 失效
    高效率,低失真的高频功率放大器

    公开(公告)号:US5264807A

    公开(公告)日:1993-11-23

    申请号:US744435

    申请日:1991-08-13

    摘要: A high frequency amplifier containing: a constant envelope signal generation circuit for transforming an input signal to form two constant envelope signals where phases of the constant envelope signals correspond to an amplitude of an envelope of the input signal; two amplifying circuits for separately amplifying two constant envelope signals; and a power synthesizing circuit for synthesizing the first and second amplified signals to generate an amplified signal of the input electric signal, and reflecting remaining components of the first and second amplified signals which remaining components remain in the above synthesizing operation, toward the first and second amplifying circuits. Further, an input impedance of the power synthesizing circuit may be controlled by shifting phases of the above reflected components by respectively predetermined amounts, or by adaptively shifting phases of the above reflected components responding to an input level, so that a total efficiency of the high frequency amplifier is maximized. The high frequency amplifier may contain, instead of the above two amplifying circuits and the power synthesizing circuit, a circuit for inverting a phase of one of the two constant envelope signals; and a single-ended push-pull amplifier circuit for receiving the other of the two constant envelope signals, and an output of the phase inversion circuit, and synthesizing the received signals to generate an amplified signal of the input electric signal.

    DC/DC converter, and power amplifier applying the same
    122.
    发明授权
    DC/DC converter, and power amplifier applying the same 失效
    DC / DC转换器和应用它的功率放大器

    公开(公告)号:US07973522B2

    公开(公告)日:2011-07-05

    申请号:US12005380

    申请日:2007-12-27

    IPC分类号: G05F1/40

    摘要: A DC/DC converter capable of controlling an output signal using a broadband signal input is provided. By employing the above DC/DC converter as a power supply, a highly efficient power amplifier can be configured. The above DC/DC converter includes two class-C amplifiers, a rectifier circuit connected between each output of the two class-C amplifiers, and an oscillator of a predetermined frequency signal. The predetermined frequency signal output from the oscillator is input to each of the two class-C amplifiers, and by controlling the phase difference of the predetermined frequency signal input to the two class-C amplifiers, the magnitude of a direct current voltage output from the rectifier circuit is made variable.

    摘要翻译: 提供了能够使用宽带信号输入来控制输出信号的DC / DC转换器。 通过采用上述DC / DC转换器作为电源,可以配置高效的功率放大器。 上述DC / DC转换器包括两个C类放大器,连接在两个C类放大器的每个输出端之间的整流器电路和预定频率信号的振荡器。 从振荡器输出的预定频率信号被输入到两个C类放大器中的每一个,并且通过控制输入到两个C类放大器的预定频率信号的相位差,从 整流电路是可变的。

    Wireless tag and electrically conductive pipe having wireless tag
    124.
    发明申请
    Wireless tag and electrically conductive pipe having wireless tag 有权
    无线标签和具有无线标签的导电管

    公开(公告)号:US20090273446A1

    公开(公告)日:2009-11-05

    申请号:US12318723

    申请日:2009-01-07

    IPC分类号: H04Q5/22 H02G3/00

    摘要: A wireless tag adapted for mounting inside a hollow electrically conductive pipe, includes: a contact placed in contact with the electrically conductive pipe so as to be electrically connected to the electrically conductive pipe; a lead wire placed inside the electrically conductive pipe along a longitudinal direction of the electrically conductive pipe and spaced a prescribed distance away from an inside wall of the electrically conductive pipe, thereby forming a coaxial line together with the electrically conductive pipe; and a wireless tag circuit, electrically connected at one end to the contact and at the other end to the lead wire, for generating a response signal in response to an interrogation signal transmitted from a reader/writer.

    摘要翻译: 一种适于安装在中空导电管内的无线标签,包括:与导电管接触的触点,以电连接到导电管; 沿导电管的长度方向配置在导电管的内部,与导电管的内壁隔开规定距离的导线,与导电管一起形成同轴线; 以及无线标签电路,其一端电连接到触点,另一端电连接到引线,用于响应于从读取器/写入器发送的询问信号产生响应信号。

    Antenna
    125.
    发明授权
    Antenna 有权
    天线

    公开(公告)号:US07595767B2

    公开(公告)日:2009-09-29

    申请号:US11808984

    申请日:2007-06-14

    IPC分类号: H01Q9/38

    摘要: An antenna having a construction enabling simple adjustment of impedance at the antenna connection terminal has a grounded plate; a plate-shape radiating conductor, positioned parallel to the grounded plate; a feed line conductor, one end of which is connected to a feed point of the plate-shape radiating conductor, the other end of which is connected, as an antenna terminal, to an inner conductor of a coaxial cable, and which is perpendicular to the plate-shape radiating conductor; and a conductor disc, electrically connected to the feed line conductor, and positioned parallel to the ground plate, the distance from the conductor disc to the grounded plate being adjustable.

    摘要翻译: 具有能够简单调整天线连接端子处的阻抗的结构的天线具有接地板; 板状辐射导体,平行于接地板定位; 馈电线导体,其一端连接到板状辐射导体的馈电点,其另一端作为天线端子连接到同轴电缆的内导体,并且垂直于 板状辐射导体; 以及导电盘,其电连接到馈电线导体并且平行于接地板定位,从导体盘到接地板的距离是可调整的。

    Antenna device
    126.
    发明授权
    Antenna device 失效
    天线设备

    公开(公告)号:US07423596B2

    公开(公告)日:2008-09-09

    申请号:US11826728

    申请日:2007-07-18

    IPC分类号: H01Q1/38 H01Q21/00

    摘要: An antenna device is disclosed. An antenna such as a dipole antenna and a parallel feeder each formed of a conductor pattern are disposed on a dielectric plate. The connector is connected to the antenna through the parallel feeder. The parallel feeder has a length of an integral multiple of a half wavelength and has an even number of bending points between the connecter and the antenna.

    摘要翻译: 公开了一种天线装置。 诸如偶极子天线和每个由导体图案形成的平行馈线的天线设置在电介质板上。 连接器通过平行进料器连接到天线。 平行进料器具有半波长的整数倍的长度,并且在连接器和天线之间具有偶数个弯曲点。

    DC/DC converter, and power amplifier applying the same
    127.
    发明申请
    DC/DC converter, and power amplifier applying the same 失效
    DC / DC转换器和应用它的功率放大器

    公开(公告)号:US20080144338A1

    公开(公告)日:2008-06-19

    申请号:US12005380

    申请日:2007-12-27

    IPC分类号: H02M3/335 H03G9/00

    摘要: A DC/DC converter capable of controlling an output signal using a broadband signal input is provided. By employing the above DC/DC converter as a power supply, a highly efficient power amplifier can be configured. The above DC/DC converter includes two class-C amplifiers, a rectifier circuit connected between each output of the two class-C amplifiers, and an oscillator of a predetermined frequency signal. The predetermined frequency signal output from the oscillator is input to each of the two class-C amplifiers, and by controlling the phase difference of the predetermined frequency signal input to the two class-C amplifiers, the magnitude of a direct current voltage output from the rectifier circuit is made variable.

    摘要翻译: 提供了能够使用宽带信号输入来控制输出信号的DC / DC转换器。 通过采用上述DC / DC转换器作为电源,可以配置高效的功率放大器。 上述DC / DC转换器包括两个C类放大器,连接在两个C类放大器的每个输出端之间的整流器电路和预定频率信号的振荡器。 从振荡器输出的预定频率信号被输入到两个C类放大器中的每一个,并且通过控制输入到两个C类放大器的预定频率信号的相位差,从 整流电路是可变的。

    Power amplifier with distortion compensation circuit
    128.
    发明申请
    Power amplifier with distortion compensation circuit 有权
    具有失真补偿电路的功率放大器

    公开(公告)号:US20080094139A1

    公开(公告)日:2008-04-24

    申请号:US12000616

    申请日:2007-12-14

    IPC分类号: H03F1/26

    摘要: A power amplifier negates a memory effect and is applied a linearizer using a digital predistortion system even in an inexpensive device. The power amplifier compares an input signal power against a sampled component of an output power, and provides predistortion to the input signal power so as to minimize a difference as a result of the comparison. The power amplifier comprises a gain lookup table storing a gain coefficient value corresponding to a temperature address determined for an input power; a phase lookup table storing a phase coefficient value corresponding to the temperature address determined for the input power; a transversal filter, which is input with the input power, and which outputs the temperature address; and a coefficient multiplier modulating the input signal using a gain coefficient value and a phase coefficient value, which correspond to the temperature address and which are read out from the gain coefficient lookup table and the phase lookup table.

    摘要翻译: 功率放大器消除了记忆效应,并且即使在廉价的设备中也使用数字预失真系统应用线性化。 功率放大器将输入信号功率与输出功率的采样分量进行比较,并且为输入信号功率提供预失真,以便作为比较的结果使差异最小化。 功率放大器包括:增益查找表,其存储对应于为输入功率确定的温度地址的增益系数值; 相位查找表,存储与为输入功率确定的温度地址对应的相位系数值; 横向滤波器,其输入有输入功率,并输出温度地址; 以及系数乘法器,其使用与所述温度地址对应并且从所述增益系数查找表和所述相位查找表读出的增益系数值和相位系数值来调制所述输入信号。

    Antenna device
    130.
    发明申请
    Antenna device 失效
    天线设备

    公开(公告)号:US20070290940A1

    公开(公告)日:2007-12-20

    申请号:US11826729

    申请日:2007-07-18

    IPC分类号: H01Q9/16 H01Q21/00

    摘要: An antenna device is disclosed. An antenna such as a dipole antenna and a parallel feeder each formed of a conductor pattern are disposed on a dielectric plate. The connector is connected to the antenna through the parallel feeder. The parallel feeder has a length of an integral multiple of a half wavelength and has an even number of bending points between the connecter and the antenna.

    摘要翻译: 公开了一种天线装置。 诸如偶极子天线和每个由导体图案形成的平行馈线的天线设置在电介质板上。 连接器通过平行进料器连接到天线。 平行进料器具有半波长的整数倍的长度,并且在连接器和天线之间具有偶数个弯曲点。