The conventional calibration methods only took into account the mutual coupling (MC) and the gain/phase error. However, the antenna element pattern could also be an important factor in calibration as the antenna element pattern could be direction-dependent. This letter proposes a calibration method to jointly estimate array errors and antenna element patterns for the uniform circular array (UCA). The array errors are composed of MC and gain/phase error. The antenna patterns of different elements are presumed rotationally similar due to the structure of the UCA. The simulation and field experiments demonstrated the effectiveness of the proposed method.

中文翻译：

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基于均匀圆阵的阵元误差及天线阵元方向图标定


传统的校准方法仅考虑互耦（MC）和增益/相位误差。然而，天线元件方向图也可能是校准中的重要因素，因为天线元件方向图可能与方向相关。这封信提出了一种校准方法来联合估计均匀圆形阵列（UCA）的阵列误差和天线元件方向图。阵列误差由MC和增益/相位误差组成。由于 UCA 的结构，不同元件的天线方向图被认为旋转相似。仿真和现场实验证明了该方法的有效性。