Mohsin NK, Naji DK. Antenna Design for Ultra-Wideband System Using a Fractal H-Shaped Structure for Enhanced Filtering and Narrowband Operation. NJES [Internet]. 2025 Dec. 20 [cited 2026 Aug. 28];28(4):515-23. Available from: http://old.nahje.com/index.php/main/article/view/1416