The basic structural unit of yarn is the fiber. 纖維是紗的基本結構單元。
It is also demonstrated that the negative permittivity and permeability frequency band of DNM could be turned by changing the DNM structure cell. 通過(guò)改變雙負材料的結構單元可以實(shí)現對負介電常數和負磁導率頻段的調控。