▎ 摘　　要

We propose the use of silicon graphene waveguides to implement a tunable broadband microwave photonics phase shifter based on integrated ring cavities. Numerical computation results show the feasibility for broadband operation over 40 GHz bandwidth and full 360 degrees radiofrequency phase-shift with a modest voltage excursion of 0.12 volt. (C) 2014 Optical Society of America