Sadchenko, A. V., O. A. Kushnirenko, M. T. Al’khamidi, and A. M. Alkhadi. 2016. “Method of Measuring the Amplitude Directivity Pattern of Parabolic Mirrored Antennas in the Audio Frequency Range”. Technology and Design in Electronic Equipment, no. 1 (February), 8-12. https://doi.org/10.15222/TKEA2016.1.08.