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    • 7. 发明申请
    • METHOD AND APPARATUS FOR PROVIDING IMPEDANCE MATCHING FOR HIGH-FREQUENCY SIGNAL TRANSMITTER
    • 用于提供高频信号发射机的阻抗匹配的方法和装置
    • US20110189964A1
    • 2011-08-04
    • US12699112
    • 2010-02-03
    • Joo Young JeonSang Hwa JungJung Hyun KimYoung Kwon
    • Joo Young JeonSang Hwa JungJung Hyun KimYoung Kwon
    • H04B1/04
    • H04B1/04
    • In accordance with another representative embodiment, a high-frequency signal transmitter a power amplifier configured to supply a high-frequency signal; an antenna configured to transmit the high-frequency signal; a transmission line configured to transfer the high-frequency signal from the power amplifier to the antenna; and an impedance matching circuit connected to the transmission line. The high-frequency signal transmitter also comprises a mismatch detector. The mismatch detector is configured to designate a comparatively poor linearity region and a comparatively good linearity region by dividing a Smith chart into the two regions based on Adjacent Channel Power Ratio (ACPR) contours drawn on the Smith chart at a point on the transmission line where the impedance matching circuit is connected, to measure a time-dependent reflection coefficient of the high-frequency signal transmitter in terms of a phase and a magnitude, to determine whether the reflection coefficient is located in the comparatively poor linearity region or the comparatively good linearity region, and based on a result of the determination, to improve the linearity of the high-frequency signal transmitter.
    • 根据另一个代表性实施例,一种高频信号发射机,被配置为提供高频信号的功率放大器; 配置为发送高频信号的天线; 传输线,被配置为将高频信号从功率放大器传送到天线; 以及与传输线连接的阻抗匹配电路。 高频信号发射机还包括不匹配检测器。 不匹配检测器被配置为通过基于在传输线上的一点上在史密斯圆图上绘制的相邻信道功率比(ACPR)轮廓将史密斯圆图划分成两个区域来指定相对较差的线性区域和相对良好的线性度区域,其中 连接阻抗匹配电路,根据相位和幅度测量高频信号发射器的时间相关反射系数,以确定反射系数是否位于相对较差的线性区域或较好的线性度 区域,并且基于确定的结果,提高高频信号发射机的线性度。