Broadband implementation of tunable, substrate-integrated, evanescent-mode, cavity bandpass filters

Shahrokh Saeedi, Ju Seop Lee, Hjalti Sigmarsson

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

    1 Citation (Scopus)

    Abstract

    A novel structure for implementing broadband external and internal coupling in heavily loaded, substrate integrated, evanescent-mode, cavity filters is presented. The proposed structure is based on adding electric field coupling to the magnetic field iris coupling, which is commonly used for such cavities. It is shown that fractional bandwidth on the order of 40% can be achieved using this new structure. As an illustration, a second order Butterworth filter is designed using the presented coupling method and then fabricated inside a two-layer RF circuit board. The measured and simulated filter results are shown to be in good agreement, with measured insertion loss of around 0.4 dB including connector losses. Finally, the filter is continuously tuned from 2910 MHz to 3795 MHz.

    Original languageEnglish
    Title of host publicationEuropean Microwave Week 2014: Connecting the Future, EuMW 2014 - Conference Proceedings; EuMC 2014: 44th European Microwave Conference
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages849-852
    Number of pages4
    ISBN (Print)9782874870354
    DOIs
    Publication statusPublished - 2014 Dec 15
    Event2014 44th European Microwave Conference, EuMC 2014 - Held as Part of the 17th European Microwave Week, EuMW 2014 - Rome, Italy
    Duration: 2014 Oct 62014 Oct 9

    Other

    Other2014 44th European Microwave Conference, EuMC 2014 - Held as Part of the 17th European Microwave Week, EuMW 2014
    Country/TerritoryItaly
    CityRome
    Period14/10/614/10/9

    Keywords

    • band-pass filters
    • evanescent-mode filters
    • Filters
    • microwave filters
    • tunable filters
    • wideband filters

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

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