Abstract:

Chiral medium is a new absorbing material, which is one kind of biisotropic medium. In the constitutive relation, the chiral parameter is very important. The target is modeled by nonuniform rational Bspline surfaces, and they are transformed into Bézier surfaces. Then, the radar cross section of a metallic target coated with chiral medium is calculated by the physical optics method. The results show that the different chiral parameters have different influence on the radar cross section of the coated target. When the chiral parameter is optimized, the radar cross section of the coated target will reduce obviously within a range of frequencies.