Low frequency lumped element-based negative index metamaterial

A lumped element-based negative index metamaterial (NIM) was designed, fabricated, and tested for operation at 400MHz in the ultrahigh frequency (UHF) band. At 400MHz the measured real part of the index of refraction of this NIM was nreal=−3.11 with a loss that was less than 1dB∕cm using unit cells whose overall size d was λ∕d∼75. The NIM bandwidth was >10% in the neighborhood of 400MHz.

[1]  A. Erentok,et al.  Characterization of a volumetric metamaterial realization of an artificial magnetic conductor for antenna applications , 2005, IEEE Transactions on Antennas and Propagation.

[2]  Lixin Ran,et al.  Experimental retrieval of the effective parameters of metamaterials based on a waveguide method. , 2006, Optics express.

[3]  Richard W. Ziolkowski,et al.  Metamaterial-based efficient electrically small antennas , 2006 .

[4]  A. Erentok,et al.  A Hybrid Optimization Method to Analyze Metamaterial-Based Electrically Small Antennas , 2007, IEEE Transactions on Antennas and Propagation.

[5]  Tatsuo Itoh,et al.  Electromagnetic metamaterials : transmission line theory and microwave applications : the engineering approach , 2005 .

[6]  A. Erentok,et al.  At and below the chu limit: passive and active broad bandwidth metamaterial-based electrically small antennas , 2007 .

[7]  N. Engheta,et al.  Metamaterials: Physics and Engineering Explorations , 2006 .

[8]  Steven A. Cummer,et al.  Wave fields measured inside a negative refractive index metamaterial , 2004 .

[9]  N. Engheta,et al.  A positive future for double-negative metamaterials , 2005, IEEE Transactions on Microwave Theory and Techniques.

[10]  Microwave focusing and beam collimation using negative index of refraction lenses , 2007 .

[11]  D. Smith,et al.  Determination of effective permittivity and permeability of metamaterials from reflection and transmission coefficients , 2001, physics/0111203.