高性能微波暗室设计中的技术考虑

The technologies for use in design of anechoic chamber with higher quality

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。本文对该技术在暗室设计中的应用进行了初步探讨。此外,在以前分析计算吸波材料的反射率与入射角的关系时,常采用性线插值法,这会引入较大的设计误差。本文运用电磁场理论推导出了反射率与入射角之间的函数关系。通过对比分析表明,新的函数关系可以消除设计误差。

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. The utilities of the theory in design have been discussed in this paper. Besides,In analysis of reflectivity versus incident angle of absorbing materials, it used to use linear interpolating method and resulted in considerable error. In the present paper, new relationship between reflectivity and incident angle of absorbing materials has been derived from the theory of electromagnetic fields. It has been demonstrated that new relationship can eliminate the error.