A new microstrip wideband filtering power divider (FPD) is presented. By selecting proper coupling topology between a λ/4 short-ended microstrip transmission line and two multimode resonators, a wideband FPD is initially constructed. Meanwhile, by wisely introducing an isolation resistor between the resonators, good port-to-port isolation of the FPD is obtained. For validation, one prototype wideband FPD operating at 2.24 GHz with the fractional bandwidth of 32.1% is designed, fabricated, and measured. Results indicate that the presented FPD exhibits not only a high-frequency selectivity performance with the help of two out-of-band transmission zeros, but also better than 22.5 dB isolation within the entire operation band.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.