A novel microstrip diplexer with novel coupling structure is proposed in this letter. The proposed diplexer is designed with several stepped-impedance resonators. A dual-mode dual-band filter unit is used in this design to replace the conventional matching network, what is more, the dual-mode dual-band filter unit is resonance with other circuit resonator. The diplexer size can be reduced efficiently in this way. The proposed diplexer is composed by two four-pole chevbyshev filters with six stepped-impedance resonators. Based on the structure, a diplexer with the central frequency of 1.89 GHz and 2.35 GHz for 4G wireless communication application is fabricated and measured. Good agreements between measured results and simulated results verify the proposed structure well.
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.