Differential microstrip lines with reduced crosstalk and common mode effect based on spoof surface plasmon polaritons

Jin Jei Wu, Da Jun Hou, Kexin Liu, Linfang Shen, Chi An Tsai, Chien-Jang Wu, Dichi Tsai, Tzong Jer Yang

    Research output: Contribution to journalArticle

    33 Citations (Scopus)


    We apply the concept of spoof surface plasmon polaritons (SPPs) to the design of differential microstrip lines by introducing periodic subwavelength corrugations on their edges. The dispersion relation and field distribution of those lines are analyzed numerically. And then through designing practical coupling circuits, we found that compared with conventional differential microstrip lines, the electromagnetic field can be strongly confined inside the grooves of the corrugated microstrip lines, sothe crosstalk between the differential pair and the adjacent microstrip lines is greatly reduced, and the conversion from the differential signal to the common mode signal can also be effectively suppressed. The propagation length of those lines is also very long in a wide band. Moreover, the experimental results in time domain demonstrate those lines perform very well in high-speed circuit. Therefore, those novel kinds of spoof SPPs based differential microstrip lines can be widely utilized in high-density microwave circuits and guarantee signal integrity in high-speed systems.

    Original languageEnglish
    Pages (from-to)26777-26787
    Number of pages11
    JournalOptics Express
    Issue number22
    Publication statusPublished - 2014 Jan 1


    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

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