Xiao, Q. ., and C. X. . Zhou. “Design of Balanced SIW Filter With Transmission Zeroes and Linear Phase”. The Applied Computational Electromagnetics Society Journal (ACES), vol. 30, no. 09, Aug. 2021, pp. 1019-23, https://journals.riverpublishers.com/index.php/ACES/article/view/10405.