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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2018-06-08
Wideband Tunable High Common-Mode Suppression Filter Based on Varactor-Loaded Slotted Ground
By
Hao-Yu Dai,

    Dr. Hao-Yu Dai

    Department of Information and Technology

    Zhejiang Sci-Tech University

    China

    Homepage

Lin Li

    Dr. Lin Li

    Zhejiang Sci-Tech University

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 77, 73-80, 2018
doi:10.2528/PIERL18051406 | Google Scholar

Abstract
In this study, a varactor-loaded slotted ground structure is investigated and utilized to construct a new tunable common-mode (CM) suppression filter for differential signals. A four-port distributed equivalent circuit model is developed for interpreting the working mechanism of CM signal suppression. It is found that the proposed simple structure is capable of tunable CM suppression with a wide frequency tuning range. The parameter selection and design principle are also given. Finally, the design theory is well vindicated by a common-mode filter using three periodic varactorloaded slots. Simulated and measured results, showing good agreement, exhibit a tuning range from 0.80 to 2.10 GHz, corresponding to the fractional tuning range of 89.7% and more than 30 dB CM rejection level.
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Citation
Hao-Yu Dai, and Lin Li, "Wideband Tunable High Common-Mode Suppression Filter Based on Varactor-Loaded Slotted Ground," Progress In Electromagnetics Research Letters, Vol. 77, 73-80, 2018.
doi:10.2528/PIERL18051406
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