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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2017-02-13
A Compact UWB BPF with Sharp Roll-off Using CPW to Microstrip Transition Structure
By
Xinlin Xia,

    Dr. Xinlin Xia

    School of Electronic Engineering

    University of Electronic Science and Technology of China

    China

    Homepage

Yu Liu,

    Dr. Yu Liu

    School of Electronic Engineering

    University of Electronic Science and Technology of China

    China

    Homepage

Hao Peng,

    Dr. Hao Peng

    School of Electronic Engineering

    University of Electronic Science and Technology of China

    China

    Homepage

Minghuan Ni,

    Dr. Minghuan Ni

    Film and Television Institute

    Sichuan Vocational College of Cultural Industries

    China

    Homepage

Haodong Lin,

    Dr. Haodong Lin

    School of Electronic Engineering

    University of Electronic Science and Technology of China

    China

    Homepage

Tao Yang

    Dr. Tao Yang

    School of Electronic Engineering

    University of Electronic Science and Technology of China

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 66, 33-38, 2017
doi:10.2528/PIERL16123003 | Google Scholar

Abstract
In this letter, a compact ultra-wideband (UWB) bandpass filter based on CPW-to-microstrip transition structure is proposed. Compared with traditional UWB BPF using hybrid structures, the proposed filter has a more sharp selectivity due to a transmission zero located at the lower edge of the passband generated by the combined effect of both CPW-MS-CPW and interdigital coupling line (ICL). Moreover, to further improve its selectivity, the CPW open stubs (CPWOS) are introduced to produce two extra transmission zeros at high frequency. The measured results show that the proposed filter has some good characteristics such as sharp roll-off, compact size (0.54λg × 0.38λg) and a very wide fractional bandwidth of 130%, which is a significant improvement to what has been reported for UWB BPF with similar structures.
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Citation
Xinlin Xia, Yu Liu, Hao Peng, Minghuan Ni, Haodong Lin, and Tao Yang, "A Compact UWB BPF with Sharp Roll-off Using CPW to Microstrip Transition Structure," Progress In Electromagnetics Research Letters, Vol. 66, 33-38, 2017.
doi:10.2528/PIERL16123003
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