THE HIGH-FREQUENCY DIELECTRIC PROPERTIES OF PMI FOAM AND SANDWICH STRUCTURES

Abstract

Abstract: The influence of density and thickness of PMI foam on its high-frequency dielectric properties and its sandwich structures with carbon fiber or glass fiber at 10GHz was studied. The results indicate that the thickness of the PMI foam has little effect on the high-frequency dielectric properties. The high-frequency dielectric properties increased linearly with the increase of the foam density,which was consistent with the theoretically calculated values. The high-frequency dielectric properties of sandwich structures gradually thickened with the increase of the foam thickness,which was close to that of PMI foam gradually,and the law conforms to the series formula model. The high-frequency dielectric properties of glass-fiber sandwich structures was less than the carbon-fiber sandwich structures.

Key words: PMI foam plastics, thickness, density, sandwich structures, high-frequency dielectric properties

CLC Number:

ZHANG Le, ZHANG Guang-cheng. THE HIGH-FREQUENCY DIELECTRIC PROPERTIES OF PMI FOAM AND SANDWICH STRUCTURES[J]. COMPOSITES SCIENCE AND ENGINEERING, 2013, 0(5): 18-21.

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