Jianxun Su, Zhi Li, Zengrui Li, Qingxin Guo and Yaoqing (Lamar) Yang 2019. Ku-Band Phase-Gradient Metasurface for Broadband High-Gain Circularly Polarized Lens Antenna. Applied Computational Electromagnetics Society Journal (ACES). 34, 05 (May 2019), 669–675.