Haryanto, Puji, Dian Widi Astuti, Mudrik Alaydrus, Ahmad Firdausi, Dian Rusdiyanto, and Huda A Majid. 2026. “An Ultra-Broadband Microstrip Antenna Using a Triple Dumbbell-Shaped Defected Ground Structure”. SINERGI 30 (1). Jakarta, Indonesia:79-90. https://doi.org/10.22441/sinergi.2026.1.008.