Low Refractive Metamaterials for Gain Enhancement of Horn Antenna |
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Authors: | Zhigang Xiao Huiliang Xu |
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Institution: | (1) Physics and Electron Communication Department of Leshan Teachers College, Leshan Sichuan, 614004, China;(2) State Key Laboratory of Optical Technologies for Microfabrication, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610209, China |
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Abstract: | A flat metamaterials (MTMs) structure with low refractive index is proposed as a cover in a high-gain horn antenna configuration.
The MTMs is composed of two-layer metallic grids and slices of foam. For the characterization of the MTMs, the low refraction
property is studied and the effective refractive index n ≈ 0.08 (12.0 GHz) is retrieved. The antenna gain and the radiation pattern are calculated. Because of the electromagnetic
wave congregating effect of the MTMs, the gain of the horn with MTMs greatly increases (about 4 dB from 11.8 GHz–12.8 GHz)
when compared with the conventional type. We conducted the experiments to verify the simulation results. The idea has a good
potential application to the feed design of parabolas. |
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Keywords: | Metamaterials Low refractive index Horn antenna High gain antenna |
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