The amount of calculation is greatly decreased over highfrequency zones by using high-frequencyapproximation method.
采用相对相位叠加的高频近似方法，处理天线阵高频区散射的计算，大幅减少了计算量。
2
The high-frequencyapproximation solution that includes the caustic region is obtained with the method combining the geometrical optics.
解决了几何光学法无法在焦散区求解的问题。
3
A hybrid technique for calculating the scattering of two-dimensional large bodies with slots is developed by combining high-frequencyapproximation method with low-frequency numerical method.