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

doi:10.1007/s12200-016-0501-y

Front. Optoelectron.

2016, Vol. 9

Issue (4) : 565-570 https://doi.org/10.1007/s12200-016-0501-y

RESEARCH ARTICLE

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

Benxin WANG¹,Xiang ZHAI¹(

),Guizhen WANG²,Weiqing HUANG¹,Lingling WANG¹

¹. School of Physics and Electronics, Hunan University, Changsha 410082, China
². Modern Educational Technology Center, Hunan Traditional Chinese Medical College, Zhuzhou 412012, China

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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

Corresponding Author(s): Xiang ZHAI

Just Accepted Date: 25 December 2015 Online First Date: 14 January 2016 Issue Date: 29 November 2016

Cite this article:

Benxin WANG,Xiang ZHAI,Guizhen WANG, et al. Broadband coplane metamaterial filter based on two nested split-ring-resonators[J]. Front. Optoelectron., 2016, 9(4): 565-570.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-016-0501-y
https://academic.hep.com.cn/foe/EN/Y2016/V9/I4/565

Fig.1 (a) is the schematic of designed structural, black dotted line in (a) represents a unit cell (b)

Fig.2 Normalized transmission spectra of original SRR and the proposed structure with different values of s₂, respectively

Fig.3 Calculated electric (|E|) (up panel) and magnetic (|H_z|) (low panel) field distributions corresponding to different transmission dips at s₂ = 4, 8, and 12 mm, respectively

Fig.4 Calculated electric (|E|) and magnetic (|H_z|) field distributions corresponding to different transmission dips at s₂ = 20, 24, and 28 mm, respectively

Fig.5 Dependence of the spectral resonance of the nested structure with the change of s₁ for s₂ = 4 mm (a) and 28 mm (b), respectively; (c) influence of the size of period P on resonance bandwidth

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