基于平行耦合微带线和DGS结构的超宽带滤波器
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国家自然科学基金资助项目(61001086;61201271)

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Ultra Wideband Bandpass Filter Based on Parallel coupled Microstrip Lines and Defected Ground Structure
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    摘要:

    提出一种应用于超宽带通信且结构紧凑的平面微带带通滤波器,通带范围为3.1~10.6 GHz,带内插损小于1 dB,群延时为0.2~0.6 ns,高于10 dB的带外抑制。超宽带的带宽通过在耦合微带线正下方底面加载缺陷地结构(DGS)实现;分别在耦合线上加载折叠的阶跃阻抗枝节和DGS上附加2条槽线,在通带的低频和高频边沿产生2个传输零点,以获得较好的频带选择性与良好的带外抑制。在实验误差允许下,仿真和测量结果较一致。

    Abstract:

    A compact planar micro strip band pass filter with 3.1~10.6 GHz bandwidth is proposed. Filter with in band insertion loss of less than 1 dB, group delay of 0.2~0.6 ns and out band rejection above 10 dB is presented for ultra wideband (UWB) applications. The desired UWB band is realized by fabricating a defected ground structure (DGS) in the bottom of the coupled micro strip lines. A folded stepped impedance stub fabricated on the frontal surface of the micro strip lines and two slots slotted in the metal patches of the DGS offer two transmission zeros at both lower and upper edges of the pass band to improve the pass band selectivity and band rejection significantly. The simulated values and measured parameter values are in good agreement within experimental error.

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王章静.基于平行耦合微带线和DGS结构的超宽带滤波器[J].压电与声光,2013,35(2):276-278. WANG Zhangjing. Ultra Wideband Bandpass Filter Based on Parallel coupled Microstrip Lines and Defected Ground Structure[J]. PIEZOELECTRICS AND ACOUSTOOPTICS

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  • 在线发布日期: 2013-04-08
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