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http://dx.doi.org/10.5515/KJKIEES.2008.19.12.1367

High-Gain Fabry-Pérot Cavity Antenna with Planar Metamaterial Superstrate for Wibro Base Station Antennas  

Kim, Dong-Ho (Electronics and Telecommunication Research Institute)
Choi, Jae-Ick (Electronics and Telecommunication Research Institute)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.19, no.12, 2008 , pp. 1367-1374 More about this Journal
Abstract
A new high-gain Fabry-$P{\acute{e}}rot$ cavity antenna for wireless broadband internet(Wibro) base station antennas, which is covered with metamaterial superstrate presenting simultaneous negative values of permittivity and permeability, is proposed. To facilitate the fabrication process using the printed circuit board(PCB) technology of today, a new planar-type metamaterial superstrate is designed, which shows negative and low positive values of a refractive index near the Wibro service frequency band. And the principle of antenna gain enhancement is analyzed from the two different view points of effectively low refractive index and of the Fabry-$P{\acute{e}}rot$ resonance condition. Single square patch antenna is used as a feeder. The separation distance is determined by considering the reflection phases of the metamaterial superstrate and the substrate satisfying Fabry-$P{\acute{e}}rot$ resonance condition, respectively. Comparison between the prediction and the measurement shows good agreement, which verifies the validity of our design approach.
Keywords
Metamaterial; Negative & Low Refractive Index; Fabry-$P{\acute{e}}rot$ Cavity; Resonator Antenna;
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