Zhou, C. X., Yihu Li, Y. Z. Xiong, and W. Wu. “Active Metamaterial Transmission Line With Gain in SiGe BiCMOS Technology”. The Applied Computational Electromagnetics Society Journal (ACES) 31, no. 05 (August 18, 2021): 551–554. Accessed May 21, 2024. https://journals.riverpublishers.com/index.php/ACES/article/view/10117.