Tian, H. ., J. . Wang, D. . Han, and X. . Wang. “A Gain-Enhanced Dual-Band Microstrip Antenna Using Metasurface As Superstrate Configuration”. The Applied Computational Electromagnetics Society Journal (ACES), vol. 36, no. 12, Mar. 2022, pp. 1586-93, doi:10.13052/2021.ACES.J.361210.