Spurious Passband Suppression in Compact Microstrip Rat-Race Coupler Deploying Modified Split Rings and Coupled Microstrip Lines.
Sangeetha VelanKanagasabai MalathiJayaram Kizhekke PakkathillamSandeep Kumar PalaniswamyTippuraju Rama RaoPublished in: Wirel. Pers. Commun. (2019)