Synthesis and applications of new left handed microstrip lines with complementary split-ring resonators etched on the signal strip
Synthesis and applications of new left handed microstrip lines with complementary split-ring resonators etched on the signal strip
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DOI：
10.1049/iet-map:20070225
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发表时间：
2008-05
影响因子：
1.7
通讯作者：
M. Gil;J. Bonache;F. Martín
中科院分区：
文献类型：
--
作者：
M. Gil;J. Bonache;F. Martín
提出了一种利用互补裂环谐振器(CSRR)实现的新型左手微带线。CSRR与串联间隙交替地蚀刻在信号条上。此外，在以前的结构中首次引入了分流连接的存根。串联间隙、CSRR和并联电感这三个元件的组合提高了设计的灵活性。通过这种方法，在不改变地平面的情况下，可以合成性能良好、尺寸紧凑的窄带人工传输线。提出了该结构的集总元件等效电路模型，并进行了验证。为了验证这些新型左手传输线的适用性，设计并制作了两个紧凑的微波组件：(I)窄带功分器和(Ii)带通滤波器。由此得到的功分器比传统实现方式小75%，比以前通过CSRR实现的功分器小50%。该带通滤光片的性能与以往基于CSRR的地平面刻蚀滤光片相当，但体积更小。这项工作代表了基于CSRR的微波元件设计的重大进展，即该方法适用于那些不能刻蚀接地面的系统。
A new type of left handed microstrip lines implemented by means of complementary split-ring resonators (CSRRs) is proposed. The CSRRs are etched on the signal strip alternating with series gaps. Additionally, shunt connected stubs are introduced for the first time to the previous structure. The combination of these three elements, that is, the series gaps, the CSRR and the shunt inductance, enhances design flexibility. By this means, the ground plane is left unaltered and narrow band artificial transmission lines with good performance and compact dimensions can be synthesised. The lumped element equivalent circuit model of the structure is proposed and validated. To demonstrate the applicability of these new left handed transmission lines, two compact microwave components have been designed and fabricated: (i) a narrow band power divider and (ii) a band pass filter. The resulting power divider is 75% smaller than the conventional implementation and 50% smaller than previous power dividers implemented by means of CSRRs. The band pass filter performance is comparable to that of previous CSRR-based filters with ground plane etching, whereas its size is smaller. This work represents a significant progress on the design of microwave components based on CSRRs, that is, the approach is opened to those systems where the ground plane cannot be etched.