Дубровка, Ф. and Долженко, Д. 2010. Ultra wideband reflector antenna log-periodic feed with operating frequency range 1–20 GHz. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia. 42 (May 2010), 54-59. DOI:https://doi.org/10.20535/RADAP.2010.42.54-59.