Rahayu, Y., Simanihuruk, J. R. M. and Yuyu Wahyu (2022) “A Compact Design of 4×4 Butler Matrix with Four Linear Array Antenna at 38 GHz”, International Journal of Electrical, Energy and Power System Engineering, 5(3), pp. 80-85. doi: 10.31258/ijeepse.5.3.80-85.