Zhou, Chunxia, Yongxin Guo, and Wen Wu. 2021. “Design of Lowpass Filter and Lowpass-Highpass Diplexer With LTCC Technology”. Applied Computational Electromagnetics Society Journal (ACES) 31 (07):817-22. https://journals.riverpublishers.com/index.php/ACES/article/view/10047.