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| Preparation and Dielectric Properties of Polystyrene Foam Material Used for Luneburg Lens Antenna |
| ZHANG Xiong1, ZHOU Yongjiang2, HUANG Lihua2
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1 Military Representative Office of Air Force in Changsha Area, Changsha 410011;
2 Key Laboratory of Advanced Ceramic Fibers and Composites, National University of Defense Technology, Changsha 410073 |
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Abstract The research on the composite material with high dielectric property is significant for the need of a new type of light dielectric composite material in modern radar and communication system. Polystyrene (PS) foam with different densities was synthesized by suspension polymerization, and the relationship between the dielectric constant and the density of PS foam was studied. The dielectric property of barium titanate (BaTiO3) powder were analyzed. The light barium titanate/polystyrene composite foam was prepared by the dry-mixing method. The dielectric constant of foam or BaTiO3/PS composites increases with the density and shows weak frequency-dependence and low dielectrical loss. Barium titanate powder has high dielectric constant and low dielectrical loss. The dielectric constant of BaTiO3/PS composites increases with the increase of BaTiO3 content. When the dielectric constant of materials are the same, BaTiO3/PS composites is less dense and lighter than that of polystyrene foam, which indicates that the addition of BaTiO3 can realize the weight reduction of dielectric materials.
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Published: 08 May 2018
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2017, Vol. 31 
