Joseph D. Majkowski. “Bandwidth Optimization of a Wideband Co-Co Antenna Array on a Thin Flexible Dielectric Using HFSS®”. Applied Computational Electromagnetics Society Journal (ACES), vol. 32, no. 03, Aug. 2021, pp. 178-85, https://journals.riverpublishers.com/index.php/ACES/article/view/9691.