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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2018-07-05
A Compact QMSIW CSRR Bandpass Filter with Simultaneous Size Reduction and Improved Wide Stopband
By
Li Sun,

    Dr. Li Sun

    Shanghai University

    China

    Homepage

Guo Hui Li,

    Dr. Guo Hui Li

    Key Laboratory of Specialty Fiber Optics and Optical Access Network

    Shanghai University

    China

    Homepage

Ya-Na Yang,

    Dr. Ya-Na Yang

    Shanghai University

    China

    Homepage

Wei Yang,

    Dr. Wei Yang

    Key Laboratory of Specialty Fiber Optics and Optical Access Network

    Shanghai University

    China

    Homepage

Xuexia Yang

    Prof. Xuexia Yang

    Shanghai University

    China

    Homepage

Progress In Electromagnetics Research M, Vol. 70, 81-88, 2018
doi:10.2528/PIERM18040601 | Google Scholar

Abstract
A size-reduced quarter-mode substrate integrated waveguide (QMSIW) band-pass filter (BPF) loaded with combination of complementary split ring resonator (CSRR) and capacitive metal patches is presented. The CSRR generates a passband below the characteristic cutoff frequency of the substrate integrated waveguide (SIW) cavity. Improved stopband rejection is also attainable by loading a capacitive metal patch. Thus, a single-layer compact BPF with wide stopband is realized successfully. The equivalent-circuit model has been derived and analyzed. To verify the validity of the presented method, an experimental filter centered at 2.45 GHz is fabricated and measured. The new filter has the return loss of 16 dB and insertion loss less than 0.9 dB. Out-of-band suppression is better than 20 dB from 3 GHz to 11.6 GHz. The whole size of the filter is only 20×17.4×0.508 mm3, achieving 75% size reduction compared to the conventional structure.
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Citation
Li Sun, Guo Hui Li, Ya-Na Yang, Wei Yang, and Xuexia Yang, "A Compact QMSIW CSRR Bandpass Filter with Simultaneous Size Reduction and Improved Wide Stopband," Progress In Electromagnetics Research M, Vol. 70, 81-88, 2018.
doi:10.2528/PIERM18040601
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