150-GHz 28-nm CMOS Reflection-Type Phase Shifter Design Suitable for Low-Q Varactor

초록

This paper presents the design and implementation of a D-band CMOS phase shifter based on a parallel reflective-load topology. Two phase-shifting architectures are explored, namely a 360 degrees continuously tunable phase shifter and a 180 degrees phase shifter combined with a phase inverter, enabling full 360 degrees phase coverage. The circuit was simplified, and the number of bias lines was minimized to facilitate future array circuit implementation. In addition, a serial peripheral interface (SPI) circuit is implemented to simplify bias control and reduce the number of external connections during array chip packaging.

키워드