A 220 GHz 5-Bit Phase Shifter with Low Phase-Error in 0.13µm BiCMOS Technology

This paper presents a 210-230 GHz vector-sum phase shifter using 0.13µm SiGe BiCMOS technology. A differential coupler is exploited to generate the I/Q quadrature signals with low phase and amplitude imbalances. The amplitude weighting circuits are realized by two current control variable gain amplifiers with phase shift redundancies. The simulation results show that the phase shifter achieves 5-bit phase resolution with 360° phase tuning range, and a peak gain of -11 dB under 27.4 mW power consumption. From 210 to 230 GHz, the simulated root-mean-square(rms) phase and gain errors are 1.93-2.22° and 1.05-1.1 dB, respectively. The core chip area is 0.21×0.22 mm2.