螺旋结构手性材料的微波介电和反射/透射性能研究

Inference of Constitutive Parameters of Helix on the Microwave Property of the Chiral Spiral Materials

研究了螺旋结构手性材料的排列方式及其螺直径对金属螺旋体介电常数和反射/透射系数的影响。利用矢量网络分析仪测量了螺旋手性材料在8.2～12.4GHz的反射/透射系数和微波介电性能。结果表明,螺旋结构手性材料的排列方式和螺直径与微波性能密切相关。选取适当的排列方式和螺直径,可使手性材料的性质在左手和右手之间转变,并可使反射系数值在X波段内为0.05。

The effects of arrangement and diameter of the ehiral spiral materials on the microwave absorbing property were investigated. The microwave permittivity properties and reflectance/transmission parameters of chiral materials were tested in the range of 8. 2-12.4GHz by using vector network analyzer. The results indicate that the microwave absorbing property is closely related to the arrangement and diameter of the chiral spiral materials. Seleering the appropriate arrangement and suitable diameter of the chiral spiral, the properties of chiral materials transform to Mt-handeds and the lower reflectance of chiral materials can be obtained in the whole X band with a value of 0. 05.