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    • 53. 发明授权
    • Power amplifier, power distributor, and power combiner
    • 功率放大器,配电器和功率组合器
    • US06980057B2
    • 2005-12-27
    • US10872380
    • 2004-06-22
    • Shigeru MorimotoHisashi Adachi
    • Shigeru MorimotoHisashi Adachi
    • H03F3/26H03F3/60H01P5/12H03F3/68
    • H03F3/602H03F3/265H03F2200/06
    • In a power amplifier of the present invention, distributed constant lines 105a and 105b have a total line length corresponding to a ½ wavelength of a fundamental wave so as to invert the phase of a fundamental wave component of a first signal amplified by a first amplification element 102a. A series resonant circuit 106 is connected a tone end between the distributed constant lines 105a and 105b, which invert the phase of a second-order harmonic component, so as to be in parallel connection with the distributed constant lines 105a and 105b. Further, the series resonant circuit 106 is connected at the other end to an output side of the second amplification element 102b. The series resonant circuit 106 resonates with a second-order harmonic frequency, thereby canceling out the second-order harmonic component.
    • 在本发明的功率放大器中,分布常数线路105a和105b具有对应于基波的1/2波长的总线路长度,以便将第一信号放大的第一信号的基波分量的相位反转, 放大元件102a。 串联谐振电路106连接在分布常数线路105a和105b之间的音调端,其使二次谐波分量的相位反转,以便与分布常数线路105a和105b并联连接 。 此外,串联谐振电路106在另一端连接到第二放大元件102b的输出侧。 串联谐振电路106与二次谐波频率谐振,从而消除二次谐波分量。
    • 55. 发明授权
    • Radio frequency power amplifier having a tertiary harmonic wave feedback
circuit
    • 具有三次谐波反馈电路的射频功率放大器
    • US5767743A
    • 1998-06-16
    • US728438
    • 1996-10-10
    • Shigeru MorimotoMasahiro Maeda
    • Shigeru MorimotoMasahiro Maeda
    • H03F1/34H03F3/193
    • H03F1/342H03F3/1935
    • An RF power amplifier includes an input-side tertiary harmonic wave control circuit and an output-side tertiary harmonic wave control circuit, respectively connected to a gate and a drain of a signal amplification FET. The RF power amplifier also includes a tertiary harmonic wave feedback circuit connected in parallel with the signal amplification FET. The tertiary harmonic wave feedback circuit includes an input-side tertiary harmonic wave bandpass filter, a tertiary harmonic wave amplification FET, a phase shifter and an output-side tertiary harmonic wave bandpass filter. These circuit elements are connected in series. Due to such a configuration, a voltage waveform and a current waveform each having a nearly rectangular shape can be easily generated at an output terminal (a drain) of the signal amplification FET, not only in the region around the efficiency saturation point whore the FET operates in a non-linear mode, but also in other linear-operation regions. Thus, the RF power amplifier can operate with improved efficiency.
    • RF功率放大器包括分别连接到信号放大FET的栅极和漏极的输入侧三次谐波控制电路和输出侧三次谐波控制电路。 RF功率放大器还包括与信号放大FET并联连接的三次谐波反馈电路。 三次谐波反馈电路包括输入侧三次谐波波带通滤波器,三次谐波放大FET,移相器和输出侧三次谐波带通滤波器。 这些电路元件串联连接。 由于这样的结构,在信号放大用FET的输出端子(漏极)处,不仅可以在FET的效率饱和点周围的区域容易地生成各自具有近似矩形形状的电压波形和电流波形 工作在非线性模式,但也在其他线性操作区域。 因此,RF功率放大器可以以更高的效率工作。