In design of anechoic chamber with higher quality, when requirements of quiet zone index are higher, it must use the geometrical theory of diffraction instead of the geometrical optics for accuracy.

• 在高性能微波暗室技术设计中,由于静区指标较高,采用一般的几何光学技术不能进行准确计算,因此需采用几何绕射理论技术。