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1. 发明公开

EP0265218A2 Vector modulators and calibration thereof 失效
标题翻译： Vektor-Modulatoren und deren Kalibrierung。
公开(公告)号：EP0265218A2
公开(公告)日：1988-04-27
申请号：EP87309238.1
申请日：1987-10-20
申请人： Hewlett-Packard Company
发明人： Edwards, Allen P. , Gildea, David R. , Lau, Chung Yiu
IPC分类号： H03C1/52 , H04L27/20 , H03C1/40 , G01R35/00
CPC分类号： H04L27/364 , G01R35/005 , H04L2027/0016 , H04L2027/0018
摘要： Calibration of a vector modulator is done using a scalar detector (220) to measure the amplitude of the RF output signal, phase shifters (221, 223) to adjust the relative phases of the I and Q components of the RF carrier, and variable attentuators (225, 227) in the I and Q modulation signal input lines to adjust the relative amplitude of the modulation signals. DC signal sources provide reference signals for the I and Q modulation inputs, carrier leak compensation signals, and calibration signals for balancing the amplitude of the I and Q modulation signals. An iterative four step calibration process is followed until no change in the results is observed. The quadrature phase error is minimized by adjusting the phase shifters (221, 223). The carrier leakage is minimized by adjusting the carrier leak compensation sources (229, 231) to minimize RF output with the modulation inputs grounded (247, 247). The amplitudes of the I and Q modulation signals are balanced by adjusting the attenuators (225, 227) until the output amplitudes are equal. Finally, the quadrature calibration signal sources (235, 237) are adjusted until the output amplitudes they produce are balanced.
摘要翻译：使用标量检测器（220）来测量矢量调制器的校准，以测量RF输出信号的幅度，移相器（221,223）来调整RF载波的I和Q分量的相对相位，以及可变参考器（225,227）在I和Q调制信号输入线中调整调制信号的相对幅度。直流信号源为I和Q调制输入提供参考信号，载波泄漏补偿信号和用于平衡I和Q调制信号振幅的校准信号。遵循迭代的四步校准过程，直到观察不到结果的变化。通过调整移相器（221,223）使正交相位误差最小化。通过调整载波泄漏补偿源（229,231）使调制输入接地（247,247）的RF输出最小化，使载波泄漏最小化。通过调节衰减器（225,227）直到输出幅度相等来平衡I和Q调制信号的幅度。最后，调整正交校准信号源（235,237），直到它们产生的输出振幅平衡。

2. 发明授权

EP0265218B1 Vector modulators and calibration thereof 失效
标题翻译：矢量调制器及其校准。
公开(公告)号：EP0265218B1
公开(公告)日：1993-12-15
申请号：EP87309238.1
申请日：1987-10-20
申请人： Hewlett-Packard Company
发明人： Edwards, Allen P. , Gildea, David R. , Lau, Chung Yiu
IPC分类号： H03C1/52 , H04L27/20 , H03C1/40 , G01R35/00
CPC分类号： H04L27/364 , G01R35/005 , H04L2027/0016 , H04L2027/0018

3. 发明公开

EP0265218A3 Vector modulators and calibration thereof 失效
标题翻译：矢量调制器及其校准
公开(公告)号：EP0265218A3
公开(公告)日：1989-07-26
申请号：EP87309238.1
申请日：1987-10-20
申请人： Hewlett-Packard Company
发明人： Edwards, Allen P. , Gildea, David R. , Lau, Chung Yiu
IPC分类号： H03C1/52 , H04L27/20 , H03C1/40 , G01R35/00
CPC分类号： H04L27/364 , G01R35/005 , H04L2027/0016 , H04L2027/0018
摘要： Calibration of a vector modulator is done using a scalar detector (220) to measure the amplitude of the RF output signal, phase shifters (221, 223) to adjust the relative phases of the I and Q components of the RF carrier, and variable attentuators (225, 227) in the I and Q modulation signal input lines to adjust the relative amplitude of the modulation signals. DC signal sources provide reference signals for the I and Q modulation inputs, carrier leak compensation signals, and calibration signals for balancing the amplitude of the I and Q modulation signals. An iterative four step calibration process is followed until no change in the results is observed. The quadrature phase error is minimized by adjusting the phase shifters (221, 223). The carrier leakage is minimized by adjusting the carrier leak compensation sources (229, 231) to minimize RF output with the modulation inputs grounded (247, 247). The amplitudes of the I and Q modulation signals are balanced by adjusting the attenuators (225, 227) until the output amplitudes are equal. Finally, the quadrature calibration signal sources (235, 237) are adjusted until the output amplitudes they produce are balanced.

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