Concave reflecting surfaces of spherical cap , paraboloid and hyperboloid of revolution are investigated with regard to the dependence of the levitation force on the section radius rb and curvature radius r ( or depth d ) of the reflector 針對球面、旋轉(zhuǎn)拋物面和旋轉(zhuǎn)雙曲面三種形狀的凹面反射端,系統(tǒng)研究了懸浮力與反射端截面半徑r _ b和曲率半徑r (或深度d )之間的本征關(guān)系。