【TVLSI】Tian Yechen: Bidirectional High-Linearity Broadband Phase Shifter Based on Passive Vector Modulation

Research Team Proposes Bidirectional High-Linearity Broadband Phase Shifter Based on Passive Vector Modulation. To address the limitations of conventional phase shifters, such as unidirectional operation and limited linearity, the research team developed a novel bidirectional quadrature signal generator utilizing transformer-based coupling, combined with a passive vector synthesis network. This architecture ensures balanced bidirectional performance while achieving expanded operating bandwidth and improved linearity. Implemented in a 40-nm CMOS process, the phase shifter demonstrates an input-referred 1-dB compression point (IP1dB) exceeding 14.5 dBm and a phase error of less than 2.6° across the 26–32 GHz frequency band.

This work was published in 2025 IEEE Transactions on Very Large Scale Integration Systems (TVLSI), a premier journal in microwave and RF integrated circuits Yechen Tian, a Ph.D. student at the School of Microelectronics, Fudan University, is the first author.

Paper link: Y. Tian et al., Design and Analysis of a 26–32-GHz 6-bit Passive Vector Modulation Phase Shifter for CMOS Bidirectional Transceiver, in IEEE Transactions on Very Large Scale Integration (VLSI) Systems, vol. 33, no. 3, pp. 673-684, March 2025, doi: 10.1109/TVLSI.2024.3490618.