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    • 66. 发明申请
    • DYNAMIC MEASUREMENT OF FREQUENCY SYNTHESIZER NOISE SPURS OR PHASE NOISE
    • 频率合成器噪声或相位噪声的动态测量
    • WO2016109814A1
    • 2016-07-07
    • PCT/US2015/068316
    • 2015-12-31
    • TEXAS INSTRUMENTS INCORPORATEDTEXAS INSTRUMENTS JAPAN LIMITED
    • SUBBURAJ, KarthikSMALA, SreekiranGANESAN, Raghu
    • G01R29/06
    • G01R29/26G01S7/03G01S7/4008G01S7/4017G01S13/343G01S13/345G01S13/931H03L7/06
    • In described examples of a method (100) of measuring phase noise (PN), a PLL frequency synthesizer includes a first phase frequency detector (PFD) receiving (101) a reference frequency signal coupled to a first charge pump (CP) coupled to a VCO having an output fed back to the first PFD through a feedback divider that provides a divided frequency signal to the first PFD. The first PED outputs an error signal. PN measurement circuitry includes a replica CP coupled to an output of a second PFD or the first PFD. The error signal is received at the replica CP, or the divided frequency signal and reference frequency signal are received at the second PFD. The replica CP outputs a scaled phase error current, which is current-to-voltage converted and amplified (102) to provide an amplified phase error voltage, and digitized (103) to provide a digital phase error signal. The digital phase error signal is frequency analyzed (104) to generate a PN measurement.
    • 在所描述的测量相位噪声(PN)的方法(100)的示例中,PLL频率合成器包括第一相位频率检测器(PFD),其接收(101)耦合到耦合到第一电荷泵 VCO具有通过反馈分频器反馈到第一PFD的输出,该反馈分频器向第一PFD提供分频信号。 第一个PED输出一个错误信号。 PN测量电路包括耦合到第二PFD或第一PFD的输出的副本CP。 误差信号在副本CP处被接收,或者在第二PFD处接收分频信号和参考频率信号。 副本CP输出比例相位误差电流,其被电流 - 电压转换和放大(102)以提供放大的相位误差电压,并且数字化(103)以提供数字相位误差信号。 对数字相位误差信号进行频率分析(104)以产生PN测量。
    • 70. 发明申请
    • SYSTEMS AND METHODS FOR ANTENNA CALIBRATION
    • 用于天线校准的系统和方法
    • WO2009015211A3
    • 2009-04-09
    • PCT/US2008070897
    • 2008-07-23
    • AVIAT COMM & SURVEILLANCE SYSSTAYTON GREGORY T
    • STAYTON GREGORY T
    • H01Q1/26G01S13/78G01S13/93
    • H01Q3/267G01S7/4017G01S7/4026G01S13/781G01S13/9303
    • A method according to an aspect of the present invention includes determining a phase offset by simultaneously providing a calibration signal to a first element of an antenna and a second element of the antenna opposite the first element. The method further includes receiving an intermix signal by a third element of the antenna, measuring an amplitude characteristic for the intermix signal, and determining a phase offset based on the amplitude characteristic. The phase offset can be used to adjust a signal provided to the first element so that it is in phase with the signal provided to the second element. This method can account for phase errors due to the construction or design of the antenna, and allows antenna elements to be calibrated without the need for phase detector devices.
    • 根据本发明的一个方面的方法包括通过同时向天线的第一元件提供校准信号以及与第一元件相对的天线的第二元件来确定相位偏移。 该方法还包括通过天线的第三元件接收混合信号,测量混合信号的幅度特性,以及基于幅度特性确定相位偏移。 相位偏移可以用于调整提供给第一元件的信号,使得它与提供给第二元件的信号同相。 该方法可以解释由于天线的构造或设计而导致的相位误差,并且允许天线元件被校准而不需要相位检测器装置。