A 28 GHz 8-Bit Calibration-Free LO-Path Phase Shifter using Transformer-Based Vector Summing Topology in 40 nm CMOS.

Zhengkun Shen, Zexue Liu, Haoyun Jiang, Yi Tan, Heyi Li, Xiucheng Hao, Junhua Liu, Huailin Liao

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