Efficient Radiation by Electrically Small Antennas made of Coupled Split-ring Resonators.
Efficient Radiation by Electrically Small Antennas made of Coupled Split-ring Resonators.
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由耦合开环谐振器制成的电小天线的高效辐射
DOI：
10.1038/srep33501
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发表时间：
2016-09-15
影响因子：
4.6
通讯作者：
Wang G
中科院分区：
文献类型：
--
作者：
Peng L;Chen P;Wu A;Wang G
本文采用耦合分环谐振器（SRRs）来构造电小天线。我们发现，通过强磁耦合，耦合的SRRs复合材料可以在比其总尺寸大得多的波长上振荡。由于其磁偶极子特性，耦合SRRs复合材料允许电磁（EM）功率辐射，从而形成电小天线（ESA）。由于具有高q谐振特性，通过互感应的方式，可以很容易地在微波区与驱动电路匹配。我们还证明，如果单个srr上的电流分布相似，这种esa的辐射效率可以大大提高，这可以通过精心设计esa来实现。通过模拟和实验测量，esa的辐射效率高达41%，相对占地面积为0.05λ0 × 0.05λ0。该方法是一种高效实现esa的有效方法，可通过标准平面光刻技术在芯片上实现。
In this paper, coupled split-ring resonators (SRRs) are used to construct the electrically small antennas. We show that through strong magnetic coupling, the coupled SRRs composite can oscillate at a wavelength much larger than its total size. Due to its magnetic dipole feature, the coupled SRRs composite allows the electromagnetic (EM) power to radiate and hence forms the electrically small antenna (ESA). Because of the high-Q resonance, the ESA could be easily matched to the driving circuit in the microwave region, through mutual induction approach. We also demonstrate that the radiation efficiency of such ESAs can be drastically improved if the current distribution on individual SRRs is similar, which is achievable by carefully designing the ESAs. From our simulations and experimental measurements, the ESAs’ radiation efficiency can reach up to 41%, with relative footprint of 0.05λ0 × 0.05λ0. Our approach would be an effective way to realize ESAs with high efficiency, which can be implemented on chip through the standard planar lithography.
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