?url_ver=Z39.88-2004&rft_id=10.1109%2FRFM.2013.6757240&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Sovuthy&rft.au=Sovuthy%2C+C.&rft.aufirst=C.&rft.title=Stepped+impedance+dual+mode+coaxial+filter&rft.date=2013&rft.genre=proceeding