Liu, S. ., L. . Yang, and X. . Wu. “A Low-Profile Wideband Circularly Polarized Metasurface Antenna Based on Characteristic Mode Theory”. The Applied Computational Electromagnetics Society Journal (ACES), vol. 37, no. 11, Apr. 2023, pp. 1110-7, doi:10.13052/2022.ACES.J.371101.