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Design comparison and magnetic control of negative permeability metamaterials

JIUN YEU CHEN1, JIA-YI YEH2, LIEN-WEN CHEN3,*

Affiliation

  1. Center for General Education, Hsing Kuo University of Management, Tainan 709, Taiwan
  2. Department of Management Information Science, Chung Hwa University of Medical Technology, Tainan 717, Taiwan
  3. Department of Mechanical Engineering, National Cheng Kung University, Tainan 701, Taiwan

Abstract

Four types of split ring resonators (SRRs), the so-called single slit SRRs, two slit SRRs (TSRRs), double ring SRRs, and modified SRRs, have been considered and numerically investigated for the comparative analysis in connection with their suitability to the design of tunable metamaterials. It is found that the TSSR configuration on the gigahertz resonance reveals a larger variation in the magnetic resonance frequency through the influences of the SRR size scaling, the slit width and the substrate permittivity Based on the TSRR structure infiltrated with liquid crystals (LCs) in the sandwich substrate, a tunable magnetic metamaterial was proposed in this study. The main relevant contribution of this paper is to provide a tuning procedure via controlling the director orientation of anisotropic LCs and to show that the TSRR structure can be designed to exhibit negative permeability over a broad frequency interval. The magnetic resonance frequencies could be adjusted in the microwave range of about 7.82 to 8.92 GHz..

Keywords

Single negative media, Negative magnetic permeability, Liquid crystals, Tunable split ring resonators (SRRs).

Citation

JIUN YEU CHEN, JIA-YI YEH, LIEN-WEN CHEN, Design comparison and magnetic control of negative permeability metamaterials, Optoelectronics and Advanced Materials - Rapid Communications, 5, 3, March 2011, pp.224-230 (2011).

Submitted at: Dec. 2, 2009

Accepted at: March 16, 2011