Improved Microstrip Folded Tri-Section Stepped Impedance Resonator Bandpass Filter using Defected Ground Structure
Improved Microstrip Folded Tri-Section Stepped Impedance Resonator Bandpass Filter using Defected Ground Structure
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DOI：
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发表时间：
2011
影响因子：
1
通讯作者：
N. M. Garmjani;N. Komjani
中科院分区：
文献类型：
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作者：
N. M. Garmjani;N. Komjani
本文研究了一种基于折叠三段阶梯阻抗谐振器（FTSIR）和缺陷接地结构（DGS）的微波微带带通滤波器（BPF）。基于阶梯阻抗谐振器（SIR）的谐振特性，通过调整其结构参数，可以在很宽的范围内调谐第一寄生谐振频率。SIR带通滤波器被设计成具有准椭圆函数响应和宽的上阻带。此外，使用五个接地槽（DGS）以省略第一寄生谐振频率。与同类无缺陷地微带滤波器相比，该结构的仿真性能显示出一定的功能优势。为了验证设计和分析，一个原型的带通滤波器与DGS的制造和测量。实验结果表明，该系统的实测性能与仿真性能吻合较好。缺陷接地结构（DGS），折叠三段阶梯阻抗谐振器（FTSIR），微带带通滤波器。
─ In this paper, a study of a microwave microstrip bandpass filter (BPF), based on folded tri-section stepped impedance resonator (FTSIR) and defected ground structure (DGS) is presented. Based on the resonance characteristics of a stepped impedance resonator (SIR), the first spurious resonant frequency can be tuned over a wide range by adjusting its structure parameters. The SIR bandpass filter is designed to have a quasi-elliptic function response and a wide upper stopband. Furthermore, five ground slots (DGS) are used in order to omit the first spurious resonant frequency. Compared to similar microstrip filter without defected ground, the simulated performances of this novel structure indicate some functional advantages. To validate the design and analysis, a prototype of the bandpass filter with DGS was fabricated and measured. It is shown that the measured and simulated performances are in a good agreement. Index Terms ─ Defected ground structure (DGS), folded tri-section stepped impedance resonator (FTSIR), microstrip bandpass filter.