فهرس المقالات Defected Ground Structure حرية الوصول المقاله صفحة الملخص نص كامل 1 - Design and Fabrication of a Lowpass Filter Using a New Butterfly-Shaped Defected Ground Structure Majeed Zaidan Vahid Rezaeian Saber Izadpanah Toos 10.52547/mjtd.10.3.129