In this letter, a coupler integrated microstrip patch linear phased array is proposed as a new self-calibration system. The proposed coupler placed along the edge of the microstrip patch antenna is weakly coupled to the antenna array. This allows self-calibration without affecting the radiation performance of the antenna array. A 1 × 4 coupler integrated patch linear phased array and a beamformer operating at 5.8 GHz were implemented to verify the new self-calibration system. The measurement result using the self-calibration is very close to the result with a vector network analyzer (VNA). The coupler integrated patch linear phased array proposed as a new self-calibration system has 0.22 dB root-mean-square error (RMSE) magnitude and 1.2$^{\circ }$ RMSE phase. The calibration method using a proposed antenna array is expected to on-site calibration.

中文翻译：

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用于自校准的耦合器集成微带贴片线性相控阵

在这封信中，耦合器集成微带贴片线性相控阵被提出作为一种新的自校准系统。沿微带贴片天线边缘放置的耦合器与天线阵列弱耦合。这允许自校准而不影响天线阵列的辐射性能。实施了一个 1 × 4 耦合器集成贴片线性相控阵和一个工作在 5.8 GHz 的波束形成器，以验证新的自校准系统。使用自校准的测量结果与使用矢量网络分析仪 (VNA) 的结果非常接近。作为新自校准系统提出的耦合器集成贴片线性相控阵具有 0.22 dB 均方根误差 (RMSE) 幅度和 1.2$^{\circ }$ RMSE 相位。使用建议的天线阵列的校准方法有望进行现场校准。