Iterative Calibration Method for Integrated Tunable mmW Vector-Sum Phase Shifter

被引：0
|
作者：
Jokinen, Markku [1 ]
Sethi, Alok [1 ]
Kursu, Olli [1 ]
Rahkonen, Timo [2 ]
Leinonen, Marko E. [1 ]
Parssinen, Aarno [1 ]
机构：
[1] Univ Oulu, Ctr Wireless Commun, Oulu, Finland
[2] Univ Oulu, Elect Circuits & Syst Res Unit, Oulu, Finland
来源：
2023 100TH ARFTG MICROWAVE MEASUREMENT CONFERENCE, ARFTG | 2023年
基金：
芬兰科学院;
关键词：
Vector modulator; phase shifter; phased array; calibration; millimeter wave; ARRAY;
D O I：
10.1109/ARFTG56062.2023.10148880
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
An iterative calibration method of 5G mmW vector-sum phase shifter (VSPS) is presented in this paper. The phase and amplitude imbalances of I and Q branches can be tuned. The phase is adjusted with a tunable polyphase filter (PPF) by changing its resonance frequency. The VSPS is equipped with differential amplifiers on each branch which are used to compensate for the amplitude imbalance. The iterative calibration method uses information collected during the measurements and adjusts VSPS parameters towards the optimal operation point. The error vector magnitude (EVM) of VSPS phase constellation decreases fast along the iterations, and the calibration process can be finished with a fraction of the measurement time compared with exhaustive search. Results show that the method can reach an RMS amplitude error of 0.11 dB and phase error of 0.6 degrees on selected frequency points.
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收藏
页数：4
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