%0 Journal Article %T Frequency characteristics investigation of tunable microstrip antenna structure %A Poplavko, Yurii Myhailovych %A Voloshyn, А. A. %A Ruda, N. A. %A Prokopenko, Yuriy Vasiliovich %A , %J Electronics and Communications %@ 1811-4512 %D 2014-12-03 %I Kyiv Politechnic Institute %~ DeepDyve