%0 Journal Article %T A new tunable bandstop filter square-ring resonator using varactor diodes %A Júnior, José Garibaldi Duarte %A Neto, Valdemir Praxedes da Silva %A d’Assunção, Adaildo Gomes %J PLoS ONE %V 18 %N 9 %D 2023-09-01 %I Public Library of Science %~ DeepDyve