The method and devices of autocompensation of phase distortions of direct digital synthesizers of signal formers of georadarsN V Dorofeev, A V Grecheneva, O R Kuzichkin, D I Surzhik and R V RomanovMATEC Web Conf., 272 (2019) 01046DOI: https://doi.org/10.1051/matecconf/201927201046