Naobumi Michishita, and Hisashi Morishita. “Helmet Antenna Design Using Characteristic Mode Analysis”. The Applied Computational Electromagnetics Society Journal (ACES) 35, no. 2 (February 1, 2020): 161–166. Accessed May 3, 2024. https://journals.riverpublishers.com/index.php/ACES/article/view/7987.