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The electromagnetic wave propagation over sand and dust storm (SDS) is modeled by applying the parabolic wave equation (PWE). The attenuation and phase shift induced by air molecules and dust particles are simulated with an effective refractivity profile.
We present a surface constitutes arrays of periodic patches, which may serve as the metasurface to synthesize the Luneburg lens. The main purpose is by using different sizes of patches to achieve different refractive index at each stage, and get the proper function of Luneburg lens.
Metamaterials had been widely investigated in literature and experiment in recent years, because of they are able to produce unusual permittivity and permeability which can be used to improve the performance of conventional devices [1]. Metamaterial structures designed to have simultaneously negative permittivity and permeability are known as left-handed materials (LHM) [2]. LHM produce negative refraction...
This work presents a dual-band high-gain metamaterial radome which can increase antenna gain. This radome operates at the WiMAX (3.5GHz) band and the WiFi (5.8GHz) band. The refractive index of this radome is designed to near zero. The radiation beamwidth of antenna becomes small and the antenna gain is increasing. The size of this radome is 90 mm × 90 mm. This radome improves antenna gain 2.6 dB...
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