57-67-GHz Highly Compact Bidirectional 3-Bit Phase Shifter in 28-nm CMOS

This letter describes a highly compact, low-loss, high-bandwidth, bidirectional, passive 3-bit phase shifter (PS) implementation for 5G and WiGig applications at 57-67 GHz, fabricated in Taiwan Semiconductor Manufacturing Company 28-nm CMOS technology. First, a highly compact, differential quadrature hybrid coupler is used for the I/Q generation. Consuming only 0.006 mm2, it achieves 4.5-dB insert...