Y.-Z. Zhu, W.-X. Xie, X. Deng, and Y.-F. Zhang. “Compact Modified Quarter Mode Substrate Integrated Waveguide Resonator and Its Application to Filters Design”. Applied Computational Electromagnetics Society Journal (ACES), vol. 32, no. 02, Aug. 2021, pp. 163-8, https://journals.riverpublishers.com/index.php/ACES/article/view/9745.