Microwave filters with improved spurious performance based on sandwiched conductor dielectric resonators

A. R. Weily*, A. S. Mohan

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    16 Citations (Scopus)

    Abstract

    Microwave filters based on a novel resonator comprised of a sandwiched conductor dielectric resonator (SCDR) loaded in a cylindrical cavity are analyzed in this paper. The SCDR is a compact resonator that exhibits good spurious performance. Resonant frequencies of the lower order modes are analyzed, and mode charts, unloaded Q, slot coupling, and screw coupling graphs are presented. S-parameters are computed using the finite-difference time-domain (FDTD) method for one- and four-pole SCDR filters and compared with measured results. The measured spurious performance for the four-pole elliptic function filter shows a large improvement over conventional dielectric-resonator filters. The measured results agree closely with predicted values obtained using the FDTD method.

    Original languageEnglish
    Pages (from-to)1501-1507
    Number of pages7
    JournalIEEE Transactions on Microwave Theory and Techniques
    Volume49
    Issue number8
    DOIs
    Publication statusPublished - Aug 2001

    Keywords

    • Dielectric-resonator filter
    • FDTD analysis
    • Mode chart
    • Sandwiched conductor dielectric resonator
    • Spurious performance

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