COMPLEX RAY EXPANSION OF PLANE WAVE

Based on the high frequency approximation theory, the complex ray expansion of plane wave is derived. The results obtained may be regarded as the basis of the numerical expansion of plane wave, which has been used successfully in some problems.

直升机旋翼对回波的调制效应分析

文中以均匀平面波的复射线拟合为基础 ,分析了直升机旋翼的旋转对目标回波的调制效应 ,这种调制主要体现在回波的幅度和频率变化上 ,即包含幅度和频率两种调制。研究了影响这两种调制的几个因素 。