New periodic-loaded electromagnetic bandgap coplanar waveguide with complete spurious passband suppression

Ferran Martín, Francisco Falcone, Jordi Bonache, Txema Lopetegi, Miguel A.G. Laso, Mario Sorolla

    Research output: Contribution to journalArticleResearchpeer-review

    32 Citations (Scopus)

    Abstract

    In this letter, coplanar waveguides (CPW) periodically loaded with shunt capacitances and periodically perturbed by varying the distance between the central strip (of constant width) and ground planes are studied. It is demonstrated that the multiple spurious passbands above the Bragg frequency, inherent to the presence of the reactive elements, can be completely and efficiently rejected by means of very simple geometry perturbation. This result is in contrast to previous works, where the rejection of multiple frequencies requires complex layout patterns and reveals that the elimination of spurious frequency bands in periodic loaded CPWs can not be merely estimated from the Fourier transform of the perturbation geometry.
    Original languageEnglish
    Pages (from-to)435-437
    JournalIEEE Microwave and Wireless Components Letters
    Volume12
    DOIs
    Publication statusPublished - 1 Nov 2002

    Keywords

    • Coplanar waveguide (CPW) technology
    • Electromagnetic band gap (EBG)
    • Microwave filters

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