Defected ground structure band-stop filter by semicomplementary split ring resonators
Defected ground structure band-stop filter by semicomplementary split ring resonators
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DOI：
10.1049/iet-map.2010.0476
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发表时间：
2011-08
影响因子：
1.7
通讯作者：
M. Naghshvarianjahromi;M. Tayarani
中科院分区：
文献类型：
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作者：
M. Naghshvarianjahromi;M. Tayarani
本研究提出一种使用缺陷接地结构的带阻滤波器。陷波频率由两个蚀刻在地平面上的半互补分裂环谐振器（scsrr）阵列和两个蚀刻在微带线外的直线谐振器产生。由于在谐振频率附近存在负的有效介电常数，因此表现出带抑制行为。该滤波器产生高抑制与锐利截止在停止带，并显示一个完全平坦和无损的通带。此外，由于谐振器和滤波器的几何结构，滤波器的均匀谐波响应被消除。所提出的滤波器构建在厚度为0.8128 mm，系数为3.55，尺寸为30 × 45 mm 2的基板上。测量表明，在2.3至2.7 GHz范围内，插入损耗低于30 dB，在2.53 GHz范围内，最大插入损耗为44 dB。由于scsrr的亚lambda操作，滤波器的电气尺寸很小，并且在最后一节中通过将所提出的滤波器与其他熟悉的超材料（如互补分裂环谐振器）进行比较来验证。此外，还介绍了基于几何滤波器参数的分布式等效电路模型。
This study proposes a band-stop filter using a defected ground structure. The notch frequency is produced by an array of two semicomplementary split ring resonators (SCSRRs), etched on the ground plane and two line resonators etched out of the microstrip line. Band reject behaviour is exhibited due to the presence of a negative effective dielectric permittivity near the resonance frequency. The filter produces high rejection with sharp cutoffs in the stop band, and shows a completely flat and lossless passband. In addition, because of the geometrical structure of the resonators and the filter, even harmonics responses of the filter are eliminated. The proposed filter is constructed on a substrate with a thickness of 0.8128 mm, e r of 3.55 and dimensions of 30 × 45 mm 2 . Measurements show an insertion loss below 30 dB from 2.3 to 2.7 GHz and a maximum insertion loss of 44 dB at around 2.53 GHz. The electrical size of the filter is small due to the sublambda operation of SCSRRs and is verified in the last section by comparing the proposed filter with other familiar metamaterials such as complementary split ring resonator. Moreover, the distributed equivalent circuit model based on geometrical filter parameters is introduced.