Oborzhytskyy, Valeriy     Features of dual-frequency passive devices design for the radio channel of wireless access systems [Текст] / Valeriy Oborzhytskyy, Ivan Prudyus, Oleg Samsonyk // Problems of infocommunications. Science and technology : conf. proc., Oct. 14-17, 2014, Kharkiv, Ukraine / Min. of Education and Science of Ukraine, Kharkiv Nat. Univ. of Radioelectronics, Acad. of Sciences of Appl. Radioelectronics. — Kharkiv, 2014. — P. ??.