Wang Yao, Helin Yan, Xiaojun Huang, and Zetai Yu. “A Four-Leaf Clover Shape MIMO Antenna for UWB Applications”. Applied Computational Electromagnetics Society Journal (ACES), vol. 31, no. 12, Aug. 2021, pp. 1421-5, https://journals.riverpublishers.com/index.php/ACES/article/view/9803.