电导率对旋波介质的手性参量和吸波性能的影响

The impact of conductivity fundus on Chiral parameters and absorbing property of Chiral media

对不同电导率基底的旋波介质进行测量,给出一种在自由空间测量旋波介质手性参量的方法.通过测量两次复反射系数、透射偏转角和椭偏率,计算得到介质的手性参量和吸波性能.对于手性参量及偏转角、椭偏率测量结果进行分析,结果表明,改变基底的电导率,可以调节旋波介质的电磁性能,当基底的电导率为4.2×10-2S/cm时,旋波介质的吸波效果最好,其反射系数的最小值达-24 dB.

A method to measure the parameter of chiral media in the free space is introduced to measure the samples of different conductivity.The results are presented of rotation angle,axial ratio,and chiral parameters.The result shows that the change of the fundus'conductivity that can regulate the electromagnetism function of chiral media.When the conductivity was 4.2×10^(-2)?S/ cm,the chrial media's absorbing capability is the best and its reflection coefficient's least value is-24?dB.