A Low-Cost Scalable 32-Element 28-GHz Phased Array Transceiver for 5G Communication Links Based on a $2\times 2$ Beamformer Flip-Chip Unit Cell
2 A 28 GHz 32-Element Phased-Array Transceiver IC with Concurrent Dual Polarized Beams and 1 . 4 Degree Beam-Steering Resolution for 5 G Communication