Morshidi UH, Abang Zaidel DN, Seman N, et al. Bandwidth Enhancement of 5G Parallel Coupled Line Band Pass Filter Using Patterned Ground Structure Technique. IJIE. 2020;12(6):87-93. Accessed April 7, 2026. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/6394