解决了几何光学法无法在焦散区求解的问题。
The high-frequency approximation solution that includes the caustic region is obtained with the method combining the geometrical optics.
利用几何光学法和物理光学法，分析了带有双柱面紧缩场天线的微波暗室内的电磁场分布。
Using the Go and Po methods, the electromagnetic fields in a microwave anechoic chamber setting up a compact two-cylindrical antennas range are analysed in this paper.
本文首先介绍了反射面天线的基本结构和几种主要的分析方法，包括几何光学法、几何绕射理论、物理光学法等。
Firstly, the basic concept and the configuration of reflector antenna are introduced in this article. And then some commonly used methods such as GO, GTD and PO etc are discussed.
由于几何光学法求解钻头震源波动方程的高频近似解有局限性，即在焦散区失效，故只能计算非焦散区的高频近似解。
Geometrical optics approach can only calculate the high frequency approach solution of drilling bit vibration source wave equation in non caustic area but it become invalid in caustic area.
由于几何光学法求解钻头震源波动方程的高频近似解有局限性，即在焦散区失效，故只能计算非焦散区的高频近似解。
Geometrical optics approach can only calculate the high frequency approach solution of drilling bit vibration source wave equation in non caustic area but it become invalid in caustic area.
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