H. Emara, S. . El Dyasti, H. . Ghouz, and M. Abo Sree, “Design of a Compact Dual-Frequency Microstrip Antenna using DGS Structure for Millimeter-Wave Applications”, J. Adv. Res. Appl. Sci. Eng. Tech., vol. 28, no. 3, pp. 221–234, Nov. 2022.