A Fast-Beam-Switching 28-GHz Phased-Array Transceiver Supporting Cross-Polarization Leakage Self-Cancellation

This work introduces a 28-GHz phased-array transceiver supporting fast beam switching. Totally 256-pattern beam settings could be stored inside the on-chip SRAM for a 4-ns beam switching. The proposed phased-array also supports 5G dual-polarized MIMO (DP-MIMO) operation with cross-pol. leakage self-cancellation. The cross-pol. leakages can be detected by the on-chip detector and cancelled by the canceller in both TX and RX modes. The measured DP-MIMO EVMs are 5.5% in 64QAM and 3.5% in 256QAM. Large-volume data streaming could be supported with low latency for the 5G NR.