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PIER PIER B PIER C PIER M PIER Letters
2007-08-30
A Novel and Compact UWB Bandpass Filter Using Microstrip Fork-Form Resonators
By
Hui Chen,

    Prof. Hui Chen

    University of Electronic Science and Technology of China

    China

    Homepage

Yu-Xing Zhang

    Dr. Yu-Xing Zhang

    University of Electronic Science and Technology of China

    China

    Homepage

, Vol. 77, 273-280, 2007
doi:10.2528/PIER07082302
Abstract
A novel and compact ultra wideband (UWB) bandpass filter (BPF) with two transmission zeros near both passband edges of lower and higher frequency is proposed by using a new structure of fork-formresonators. The fork-formresonator generates a attenuation pole at the higher passband edge, lower insertion loss, wider bandwidth and compacter dimension, as compared with the traditional parallel unilateral-coupled resonator. A microstrip bandpass filter cascaded by two stages fork-formresonators with a 3-dB fractional bandwidth of 128% (from1.0 GHz to 4.6 GHz) is designed, fabricated, and tested. The measured characteristics of the filter agree with the theoretical simulations, and the measured results show good specifications which are very low insertion loss 0.5±0.3 dB within the passband and good return loss less than −15 dB from1.5 GHz to 4.0 GHz, respectively.
Citation
Hui Chen, and Yu-Xing Zhang, "A Novel and Compact UWB Bandpass Filter Using Microstrip Fork-Form Resonators," , Vol. 77, 273-280, 2007.
doi:10.2528/PIER07082302
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