Design of Substrate Integrated Waveguide Transversal Filter With High Selectivity

Design of Substrate Integrated Waveguide Transversal Filter With High Selectivity
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高选择性基片集成波导横向滤波器设计

DOI:
10.1109/lmwc.2010.2047518
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发表时间:
2010-04
影响因子:
3
通讯作者:
Li, Rongqiang
Li, Rongqiang
中科院分区:
工程技术2区
文献类型:
--
作者:
Xiao, Fei;Tang, Xiaohong;Li, Rongqiang

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这封信介绍了一种使用具有高选择性的改进双透镜 (MD) 的衬底集成波导 (SIW) 横向带通滤波器 (BPF)。修改后的双合透镜包含两个彼此不耦合的谐振器。然而,源和负载直接耦合以生成两个传输零点。通过改变一个耦合系数的符号并使修改后的双合透镜中的谐振器失谐,可以将两个传输零点同时放置在通带下方或上方,或者可以将一个传输零点放置在通带下方而另一个放置在通带上方。此外,还使用专用输入和输出 SIW 来抑制较低模式以获得最大选择性。设计、制作并测量了带宽为 130 MHz 的二阶 14.87 GHz 横向带通滤波器。测量结果证实了理论预测,并验证了新结构的高选择性应用。
A substrate integrated waveguide (SIW) transversal bandpass filter (BPF) using Modified Doublet (MD) with high selectivity is presented in this letter. The modified doublet contains two resonators that are not coupled to each other. However, the source and the load are directly coupled in order to generate two transmission zeros. By changing the sign of one coupling coefficient and detuning the resonators in the modified doublet, two transmission zeros can be simultaneously placed below or above the passband, or one can be placed below and the other above the passband. In addition, a dedicated input and output SIW are used to suppress the lower mode for maximum selectivity. A second-order 14.87 GHz transversal BPF with 130 MHz bandwidth is designed, fabricated and measured. The measured result confirms the theoretical prediction, and validates the new structure for high-selectivity applications.
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发表时间: 2002-10
期刊: 2002 32nd European Microwave Conference
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