A 28ghz Cmos Phased-Array Transceiver Featuring Gain Invariance Based On Lo Phase Shifting Architecture With 0.1-Degree Beam-Steering Resolution For 5g New Radio

This paper presents a CMOS implementation of 28-GHz 4-element phased-array transceiver for 5G new radio. The proposed LO phase shifting architecture realizes very fine 0.04 degrees phase tuning step and gain-invariant feature. An 8-element transceiver demonstrates the measured 0.1-degree beam-steering resolution and less than 0.2dB gain variation over the whole phase tuning range. In a 5-meter distance, the transceiver achieves 6.4Gb/s in 256QAM for beam angle of +/- 50 degrees together with a maximum data rate of 15Gb/s in 64QAM, and consumes 1.2W/chip in TX mode and 0.59W/chip in RX mode.