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PIER PIER B PIER C PIER M PIER Letters
2008-11-19
Novel Compact Microstrip Ultra-Wideband Filter Utilizing Short-Circuited Stubs with Less Vias
By
Mohammad Shahrazel Razalli,

    Dr. Mohammad Shahrazel Razalli

    School of Computer & Communication Engineering

    Universit Malaysia Perlis

    Malaysia

    Homepage

Alyani Ismail,

    Professor Alyani Ismail

    Department of Computer and Communication System Engineering

    Universiti Putra Malaysia

    Malaysia

    Homepage

Mohd Adzir Mahdi,

    Dr. Mohd Adzir Mahdi

    Department of Computer and Communication Systems Engineering

    Faculty of Engineering, Universiti Putra Malaysia (UPM)

    Malaysia

    Homepage

Mohd Nizar bin Hamidon

    Dr. Mohd Nizar bin Hamidon

    Department of Electrical and Electronic Engineering

    Universiti Putra Malaysia

    Malaysia

    Homepage

Progress In Electromagnetics Research, Vol. 88, 91-104, 2008
doi:10.2528/PIER08102303
Abstract
We present here a new pattern with compact size of Ultra Wideband (UWB) microwave filter. The filter is based on quarter-wave length short-circuited stubs model. We introduced here a new schematic model by extracting all parasitic elements such as T-junction and discontinuity in our new pattern of UWB filter. This new filter has minimal number of vias and improved frequency bandwidth, insertion loss and return loss. It is fabricated on RT Duroid 5880 with 0.508mm of substrate thickness. The final dimension is measured as 21mm×14 mm. It is not only compact, but also delivers excellent scattering parameters with magnitude of insertion loss, |S21| lower than 0.85 dB and return loss better than -11.6 dB. The fractional bandwidth is 109% from 3.06 GHz to 10.43 GHz. In the pass band, the measured group delay varies in between 0.47 ns to 0.32 ns, showing stability with minimum variation of only 0.15 ns.
Citation
Mohammad Shahrazel Razalli, Alyani Ismail, Mohd Adzir Mahdi, and Mohd Nizar bin Hamidon, "Novel Compact Microstrip Ultra-Wideband Filter Utilizing Short-Circuited Stubs with Less Vias," Progress In Electromagnetics Research, Vol. 88, 91-104, 2008.
doi:10.2528/PIER08102303
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