Progress In Electromagnetics Research M · 2009 · 121 citations · 20 references
EngineeringElectrical EngineeringMaterials ScienceAntennasElectromagneticsMicrowave EngineeringAntenna DesignAntenna SimulationBroadband AntennasMicrostrip AntennasMicrowave AntennasPlanar AntennasAntenna Bandwidth EnhancementMetamaterialsMicrostrip Antenna BandwidthMicrostrip Antenna GainMicrostrip Patch AntennasNegative RefractionPermittivitySplit-ring Resonators
Abstract—The design, simulation and fabrication of a left-handed metamaterial (LHM) structure is presented. The combination of the modified square rectangular Split Ring Resonator (SRR) and the Capacitance Loaded Strip (CLS) were used to obtain the negative value of permeability, µ and the negative permittivity, ε. Nicolson-Ross-Wier approach was used to identify the double negative region. A good agreement between simulated and measured results has been achieved. Upon incorporation with a single patch microstrip antenna, the performance of the antenna was improved where the gain of the microstrip antenna was increased up to 4 dB, and its bandwidth widens from 2.9 % to 4.98%. These improvements are due to the negative refraction characteristics of the LHM structure that acts as a lens when placed in front of the antenna. 1.
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Experimental Verification of a Negative Index of Refraction
R. A. Shelby, David R. Smith, S. Schultz · Science · 2001 · 9.2K citations
Composite Medium with Simultaneously Negative Permeability and Permittivity
David R. Smith, Willie J. Padilla, D. C. Vier et al. · Physical Review Letters · 2000 · 8.7K citations · Full text