Aspects of design antennas for radio occultation method of ionosphere diagnosticsAlexander Generalov, Elchin Gadzhiev, Pavel Shmachilin, Yuri Polushkovskiy, Vladimir Skripachev and Mihael TumanovITM Web Conf., 30 (2019) 05012DOI: https://doi.org/10.1051/itmconf/20193005012