Huang, Q. D. ., and Y. J. . Cheng. “Ferrite-Loaded Substrate Integrated Waveguide Frequency-Agile Bandpass Filter”. Applied Computational Electromagnetics Society Journal (ACES), vol. 31, no. 07, Aug. 2021, pp. 823-8, https://journals.riverpublishers.com/index.php/ACES/article/view/10049.