摘要
将损耗媒质中的复射线场视为波动方程的一个高频渐近解,详细讨论了这种场的属性,并耗情形作了对比.结果表明,损耗媒质中的复射线场仍能有效地表示高斯波束,在无耗情形下与无发展的复射线处理方法可以推广到损耗媒质情况,用该方法计算了具有吸波材料涂层的金属平板的雷达截面(RCS),理论计算与实验结果吻合很好,表明复射线理论的这一推广是可行的.
As an asymptotic solution of the wave equation at high, frequency, the complex ray field in lossy media is discussed in detail, and oompai'ed with the case of lossless ones. From these discussions, it is found that the Gaussian beam can also be effectively expressed by the complex ray field in lossy media, and the complex ray approaches developed in the lossless case can also be used in the lossy case. As an example, we give the ROS results obtained by both theoretical and experimental methods for a conducting flat plate with one surface coated with radar absorbing materials. Their good agreement shows the extension of complex rays from lossless media to lossy ones is reasonable.
出处
《应用科学学报》
CAS
CSCD
1992年第2期106-112,共7页
Journal of Applied Sciences
基金
国家教委博士学科点基金
国家自然科学基金资助课题
关键词
损耗媒质
复射线
雷达截面
complex ray, radar cross section, radar absorbing material.
