改进q因子的c形DGS双带阻滤波器的实验研究

Mostafa Attaran Kakhki, M. H. Neshati
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引用次数: 1

摘要

提出了一种紧凑、小尺寸的双带阻c型缺陷接地结构。设计了两个相似的c形图纹地面结构,并调整了其尺寸,以获得2.4 GHz和6.7 GHz的带阻频率响应。然后,两个dgs结构串联级联,获得高q因子双带抑制性能。调整两个dgs之间的距离以获得可接受的响应。利用HFSS对所有结构进行了数值研究,并设计和实现了双带滤波器。结果表明,在2.468 GHz和6.629 GHz处存在两个平行谐振频率,其q因子非常高,而在谐振频率处信号衰减至少为20 dB。并给出了该滤波器的等效电路,该等效电路包括两个基于测量s参数的并联谐振RLC电路。本文成功地设计和制作了新型DGS滤波器,测量结果与数值研究结果吻合较好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental investigation of a dual band-reject filter using C-shaped DGS with improved Q-factor
A compact, small size dual band-stop C-shaped defected ground structure (DGS) is proposed in this paper. Two similar C-shaped patterned ground structures are designed and their dimensions are adjusted to obtain band rejection frequency response at 2.4 GHz and 6.7 GHz. Then, two DGSs structure are cascaded in series to obtain a high Q-factor dual-band rejection property. The distance between two DGSs is adjusted for an acceptable response. All structures are numerically investigated using HFSS and the dual band filter is designed and implemented. Results show that there are two parallel resonance frequencies at 2.468 GHz and 6.629 GHz with a very high Q-factor, while signal attenuation at the resonant frequencies is at least 20 dB. Also, the equivalent circuit of the proposed filter including two parallel resonance RLC circuit based on measured S-parameters is presented. The new introduced DGS filter is successfully designed and fabricated and the measured results are in a good agreement with those obtained by numerical investigation.
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