Дубровка, Ф.Ф., and Д.С. Долженко. 2010. “Ultra Wideband Reflector Antenna Log-Periodic Feed With Operating Frequency Range 1–20 GHz.”. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, no. 42 (May):54-59. https://doi.org/10.20535/RADAP.2010.42.54-59.