K. Koesmarijanto, N. A. Putri Alifia, and H. Darmono, “Design and Implementation of 2x4 Element Hexagonal Array Microstrip Antenna with DGS Method in the Shape of Dumbbell Circle Head for 2.4 GHz Frequency Wi-Fi Applications”, Jartel, vol. 12, no. 4, pp. 232-238, Dec. 2022.