Numerical studies on dual-band electromagnetic energy harvesting with double-ring split-ring resonators

Recently, split-ring resonators (SRRs) have been studied as the receiving element for electromagnetic energy harvesting, or RF energy harvesting, for its electrically small size and electric field concentration at resonance. However, traditional single-ring SRR studied in literature possesses intrinsic single bandwidth, unfit for collecting ambient multi-band RF energy. This paper proposes a double-ring SRR to harvest dual-band RF energy at 0.9 GHz and 2.4 GHz. Numerical simulation shows that the coupling between the two rings plays a critical role in the harvesting efficiency and the reasons are analyzed regarding to the electrical size of SRR and the electric field distribution. By utilizing the coupling, the double-ring SRR shows the effectiveness of dual-band energy harvesting, with a simulated efficiency of 84% at 0.9 GHz and 47% at 2.4 GHz.

[1]  David R. Smith,et al.  Description and explanation of electromagnetic behaviors in artificial metamaterials based on effective medium theory. , 2007, Physical review. E, Statistical, nonlinear, and soft matter physics.

[2]  J. Pendry,et al.  Magnetism from conductors and enhanced nonlinear phenomena , 1999 .

[3]  K. Aydin,et al.  Subwavelength resolution with a negative-index metamaterial superlens , 2007 .

[4]  David R. Smith,et al.  Metamaterial Electromagnetic Cloak at Microwave Frequencies , 2006, Science.

[5]  M. Kafesaki,et al.  Electric coupling to the magnetic resonance of split ring resonators , 2004 .

[6]  Omar M. Ramahi,et al.  Metamaterial particles for electromagnetic energy harvesting , 2012 .

[7]  Willie J Padilla,et al.  Composite medium with simultaneously negative permeability and permittivity , 2000, Physical review letters.

[8]  Joseph A. Paradiso,et al.  Energy scavenging for mobile and wireless electronics , 2005, IEEE Pervasive Computing.

[9]  Carsten Rockstuhl,et al.  On the reinterpretation of resonances in split-ring-resonators at normal incidence. , 2006, Optics express.

[10]  Willie J Padilla,et al.  Perfect metamaterial absorber. , 2008, Physical review letters.

[11]  F. Medina,et al.  Comparative analysis of edge- and broadside- coupled split ring resonators for metamaterial design - theory and experiments , 2003 .

[12]  Steven A. Cummer,et al.  A microwave metamaterial with integrated power harvesting functionality , 2013 .

[13]  Dong-You Choi,et al.  Comparative Study of Antenna Designs for RF Energy Harvesting , 2013 .

[14]  Kwai-Man Luk,et al.  Measurement and analysis of miniature multilayer patch antenna , 2002 .

[15]  Omar M. Ramahi,et al.  Electrically small resonators for energy harvesting in the infrared regime , 2013 .

[16]  S. Cummer,et al.  $Q$-Based Design Equations and Loss Limits for Resonant Metamaterials and Experimental Validation , 2008, IEEE Transactions on Antennas and Propagation.