Ka-band hybrid phase shifter for analog phase shift range extension using 0.13-μm CMOS technology

This paper presents a new concept of the phase shifter design called a hybrid phase shifter. The proposed hybrid phase shifter consists of an analog-type active phase shifter and a digital-type passive phase shifter. To verify the idea the circuit is designed using 0.13-μm RF CMOS technology at 22-26-GHz UWB frequency band. The hybrid phase shifter has the continuous phase shift range up to 25.40, which is able to cover almost two times of the designed analog or digital phase shifter range. The gain drift of about -2.0 dB to 0.7 dB at 24-GHz is observed during phase shift. The simulation results confirm that the proposed hybrid phase shifter can be a good candidate as one of the phase shifter for the implementation in active phased array or multi-antenna beamforming system.