Resonant Frequency and Bandwidth Tunable Ring Resonator Using GaAs FET SPST Switches Kawai, Kunihiro ; Okazaki, Hiroshi ; Narahashi, Shoichi ; Suematsu, Noriharu Abstract Publication: IEICE Transactions on Electronics Pub Date: May 2019 DOI: 10.1587/transele.2018ECP5063 Bibcode: 2019IEITE.102..388K