电导率对旋波介质吸波性能的影响

旋波介质的吸波性能与介质的手性参量有关,而手性参量又与介质的电导率有关。制备了4种不同电导率基底的旋波介质,根据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。结果表明,改变旋波介质基底的电导率,可以调节旋波介质的电磁性能和吸波性能,当基底的电导率为4.2×10–2 S/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。

Impact of conductivity fundus on absorbing property of chiral media

The absorbing property of chiral medium was closely related with chiral parameters of medium.What’s more,the chiral parameters were closely associated with the conductivity of medium.Four chiral media with different fundus’ conductivity were made.According to the method of gauging chiral medium and chiral parameters in the free space and by means of measuring double reflection coefficient,revealed rotation angle and axial ratio,chiral parameters and absorbing property were obtained by calculation.The result shows that the change of the fundus’conductivity can regulate the electromagnetism function and absorbing property of chiral media.When the conductivity is 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.