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首页> 外文期刊>Microwaves, Antennas & Propagation, IET >New design of compact dual band-notch ultra-wideband bandpass filter based on coupled wave canceller inverted T-shaped stubs
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New design of compact dual band-notch ultra-wideband bandpass filter based on coupled wave canceller inverted T-shaped stubs

机译：基于耦合消波器倒T形短节的紧凑型双带陷波超宽带带通滤波器的新设计

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摘要

The procedure of attaining a compact bandpass filter (BPF) with dual band-notch function for ultra-wideband (UWB) applications is presented and discussed. In the proposed BPF, defected ground structure is used in order to improve the out-of-band performance of the filter. Also, four short-circuited bent stubs are employed in order to improve the selectivity of the filter at its cutoff frequencies. Dual band-notch function is added to the performance of the filter by coupling two short-circuited inverted T-shaped stubs to the filter main resonator. The fabricated filter satisfies well the demands of the Federal Communications Committee with two narrow band-notch functions at 5.5 and 8 GHz, which eliminates the interference of the UWB system with wireless local area network (WLAN) and satellite communication systems, respectively. The improved upper stop-band of the proposed filter with more than 20 dB attenuation level extends up to 20 GHz.
机译：介绍并讨论了获得具有双带陷波功能的紧凑型带通滤波器（BPF）的过程，用于超宽带（UWB）应用。在提出的BPF中，使用有缺陷的接地结构以改善滤波器的带外性能。另外，采用了四个短路的弯曲短截线，以提高滤波器在截止频率时的选择性。通过将两个短路的倒T形短截线耦合到滤波器主谐振器，可以在滤波器的性能中增加双带陷波功能。制成的滤波器在5.5和8 GHz上具有两个窄带陷波功能，可以很好地满足联邦通信委员会的要求，从而分别消除了UWB系统对无线局域网（WLAN）和卫星通信系统的干扰。所提出的滤波器的改进的较高的阻带具有超过20 dB的衰减水平，可扩展到20 GHz。

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