Romanenko, S. N., V. P. Dmitrenko, and A. V. Tverdenko. “COMPACT DIRECTIONAL COUPLERS USING COMBINATION OF MICROSTRIP AND SLOT LINES”. Radio Electronics, Computer Science, Control, no. 4 (November 25, 2019): 7–13. Accessed April 16, 2024. http://ric.zntu.edu.ua/article/view/190771.