An enhanced phasor-sum method for accurate built-in relative phase and amplitude detection in beamforming phased arrays
An enhanced phasor-sum method for accurate built-in relative phase and amplitude detection in beamforming phased arrays
复制标题
一种增强相量和方法，用于波束形成相控阵中精确的内置相对相位和幅度检测
DOI：
10.1109/mwsym.2016.7540358
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Janne
中科院分区：
文献类型：
--
作者：
Wei;Yue;Pei;Sheng;Janne
提出了一种精确的相位和方法，用于相控阵系统中相邻射频链之间的相对相位和幅度的内建检测。两个RF信号的相量和提供了不同的幅度-相位三角关系，由此可以仅通过信号幅度来确定相对相位。然而，由于检测电路和器件的阻抗失配或非线性，幅度失真会引入相当大的相位误差。在我们提出的方法中，首先消除幅度失真误差，然后显着减少相位误差。对3GHz四链射频阵列的测量结果表明，在0° ~ 180°范围内，均方根相位误差小于3.2°，功率误差小于0.3dB。
An accurate phasor-sum method is proposed for the built-in detection of relative phase and amplitude between neighboring RF chains in phased array systems. The phasor sum of two RF signals provides a distinct amplitude-phase trigonometric relationship, from which the relative phase can be determined solely by the signal amplitudes. However, the amplitude distortion, attributed from the impedance mismatch or nonlinearity of detection circuits and devices, introduces considerable phase error. In our proposed method, the amplitude distortion error is first eliminated and then the phase error is significantly reduced. The measurement results of a 3-GHz four-chain RF array demonstrate that the root-mean-square phase error is less than 3.2° over the entire 0° to 180° range and the power error is less than 0.3 dB.