“Spherical Slot Antenna With Multi-Element Resonant Diaphragm in the Waveguide”. Visnyk of V.N. Karazin Kharkiv National University, series “Radio Physics and Electronics”, no. 24 (June 21, 2016): 35–40. Accessed October 25, 2026. https://periodicals.karazin.ua/radiophysics/article/view/6382.