TY JOUR TI Study of System of Wireless Power Transfer KW wireless power transmission KW directional couplers KW coupling circuits KW electromagnetic coupling KW voltage-controlled oscillators JO Infocommunications and Radio Technologies AU Shirokov, I.B. AU Serdyuk, I.V. AU Azarov, A.A. AU Shirokova, E.I. PY 2022 IS 5 PB Federal State Educational Institution of Higher Education Sevastopol State University