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A multi-mode resonator-based UWB bandpass filter with wide stopband

  • Ting Zhang (a1), Fei Xiao (a1), Xiaohong Tang (a1) and Lei Guo (a2)

Abstract

In this paper, a novel multi-mode resonator is presented, which is formed by cascading several open-circuited transmission line sections with a coupled-line section. Owing to its symmetry, even- and odd-mode analysis methods are applied to analyze its resonance characteristic. Based on this resonator, a microstrip ultra-wide bandwidth (UWB) bandpass filter is designed, fabricated, and measured. The simulated and measured results show that its bandwidth can cover the desired UWB. Return loss in passband is better than −14 dB. This filter is featured by good selectivity and wide stopband. Stopband suppression as low as −40 dB can be achieved within frequency range from 12 to 16 GHz.

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Corresponding author

Corresponding author: F. Xiao Email: fxiao316@gmail.com or fxiao@uestc.edu.cn

References

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[4] Deng, H.W.; Zhao, Y.J.; Zhang, L.; Zhang, X.S.; Gao, S.P.: Compat quintuple-mode stub-loaded resonator and UWB filter. IEEE Microw. Wireless Compon. Lett., 20 (2010), 438440.
[5] Chu, Q.X.; Wu, X.H.; Tian, X.K.: Novel UWB bandpass filter using stub-loaded multiple-mode resonator. IEEE Microw. Wireless Compon. Lett., 21 (2011), 403405.
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Keywords

A multi-mode resonator-based UWB bandpass filter with wide stopband

  • Ting Zhang (a1), Fei Xiao (a1), Xiaohong Tang (a1) and Lei Guo (a2)

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