Broadband coplane metamaterial filter based on two nested split-ring-resonators

Abstract

Split ring resonators (SRRs)-based broadband metamaterial filters have attracted considerable attention due to their great prospect of practical applications. These filters had been usually obtained by stacking multiple different-sized metallic patterns, making their fabrication quite troublesome. Herein, we presented a simple design of broadband filter composed of two nested SRRs. The resonance bandwidth of the metamaterial filter gradually increased with the decrease of the arm length of the inner SRR. The increase in the resonance bandwidth was attributed to the increase in the radiation of the entire structure. Moreover, the bandwidth of the metamaterial can be further broadened by decreasing the period of the structure. The proposed filter provides a meaningful way toward expanding the bandwidth operating range from narrowband to broadband in an effective way.

Keywords

metamaterial / broadband filter / split-ring-resonators

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 61176116 and 11074069), the Specialized Research Fund for the Doctoral Program of Higher Education of China (No. 20120161130003), and the 2013 Graduate Science and Technology Innovation Program of Hunan province (No. 521298927).

RIGHTS & PERMISSIONS

2016 Higher Education Press and Springer-Verlag Berlin Heidelberg