Fast Characterization of Phased-Array Elements Using Orthogonal Codes

Yuuichi Aoki,Yonghoon Kim,Yongan Hwang,Heedo Kang,Sunryoul Kim,An-Sang Ryu,Manh Tuan Dao,Kihong Min,Daehyun Kang,Donggyu Minn,Hyun-Chul Park,Sehyug Jeon,Sung-Gi Yang

IEEE Transactions on Microwave Theory and Techniques（2023）

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摘要

This article presents a fast-phased array characterization of a 5G millimeter-wave (mmWave) base station (BS). The amplitude, phase, and inter-modulation distortion of multiple antenna elements are characterized simultaneously using an orthogonal code. The proposed orthogonal code suppresses dynamic range and realizes multiple vector measurements with a single capture. The phase drift estimation enables the asynchronous measurement of BS and instruments. The method is demonstrated using 256-element phased-array antennas (PAAs) for 5G mmWave BS.

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关键词

Beamforming,calibration,digital predistortion (DPD),5G mobile communication,least-squares method,millimeter-wave (mmWave) technology,over-the-air (OTA) test,phased arrays,power amplifiers (PAs)

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