Microstrip wideband diplexer with narrow guard band based on all-resonator structures

Yun Wu, Yi Wang, Eugene A Ogbodo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


This paper presents a wideband microstrip diplexer with adjacent channels based on an all-resonator structure. The diplexer demonstrates an overall bandwidth of 23.7% between 1.71 GHz and 2.17 GHz and a narrow guard band of only 40 MHz. Two trisection resonator structures are introduced to generate asymmetric transmission zeros to increase isolation between the two channels. The coupling matrix for the all-resonator diplexer is acquired. The diplexer is designed and fabricated on a Rogers RO4003C substrate. The measured results show insertion losses of 1.31 dB and 1.2 dB in the two channels, and an isolation of over 28 dB. These results are in good agreement with the simulation.
Original languageEnglish
Title of host publicationMicrowave Conference (EuMC), 2016 46th European
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages4
ISBN (Electronic)9782874870439
ISBN (Print)9781509015146
Publication statusPublished - 19 Jan 2017
Event46th European Microwave Conference, EuMC 2016 - London, United Kingdom
Duration: 4 Oct 20166 Oct 2016


Conference46th European Microwave Conference, EuMC 2016
Country/TerritoryUnited Kingdom


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