A New 8 GHz differential 120° Tunable active phase shifter integrated in a $0.25\ \mu \mathrm{m}$ BiCMOS SiGe:C technology

Analysis and design of an innovative 19.5 GHz active phase shifter architecture, implemented in a 0.13 μm BiCMOS SiGe:C process, for beamforming in 5G applications

“…This technique allows to obtain a continuous and linear phase shift in the whole phase plane but at the expense of the complexity of implementation of the frequency tripler for which a limiter stage is necessary. Another method, based on a triple push ILVCO, was developed by [26] to control the elements of the antenna array linearly throughout the 360° phase plane but the system suffers from complexity and high-power consumption limitations which leads to further research. As a consequence, we propose here an active phase shifter in the millimeter wave band to address the challenges encountered by the previously presented active phase shifters.…”