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A comparative study of the corrosion properties of an AlZnMgCu alloy subjected to simulate age‐forming (SAF) and traditional aging was performed. The samples pretreated at 160 °C for 24 h using SAF and traditional aging, were immersed in 3.5 wt% sodium chloride solution for up to 96 h, the process of which was monitored by in situ electrochemical impedance spectroscopy (EIS). Optical profilometry...
In this paper, we present a method to reduce the sidelobe levels of a given parabolic reflector antenna by coating it with a 2-layer absorber. The absorber is designed by using Genetic Algorithm and an ultra-wideband performance (4.6–18 GHz) is obtained. The simulation results show that the sidelobe level can be reduced by coating the edge of the parabola with 2-layer absorber without compromising...
The current study confirmed preliminarily the relation between microstructure, static electrical and magnetic properties and electromagnetic properties, the crucial range of conductivity (0.5-5χlO"2 Ω-cm) for obtaining high permeability and intense dielectric loss was obtained, and also the effect of microstructure on exchange-couple was clearly demonstrated, which maybe suggestive for further...
In this paper, we present the design of a two-layer microwave absorber with ultra-wideband performance, covering the range of 4.6 to 18 GHz. An analysis of the impedance transformation characteristics of the two-layer system is included to help understand how the low impedance of a PEC plane is mapped into the matched-condition by the two layers.
FeNi3 nanospheres (NS) with an average diameter of 400 nm were synthesized by a simple low temperature reduction method. FeNi3@C core-shell structured nanocapsules (NC) were then fabricated with a hydrothermal process. The electromagnetic (EM) properties of paraffin matrix composites containing FeNi3 NS and FeNi3@C NC were studied at 2-18 GHz. The effect of dielectric carbon coating on the EM properties...
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