一致性绕射理论求解球面反射点的快速方法  

Fast approach for reflected-ray tracing on spheres of uniform theory of diffraction

作　　者：陈晨[1] 杨放[1,2] 郭陈江[1] 许家栋[1] 

机构地区：[1]西北工业大学电子信息学院,西安710072 [2]西安建筑科技大学信息与控制学院,西安710055

出　　处：《强激光与粒子束》2010年第7期1599-1601,共3页High Power Laser and Particle Beams

摘　　要：射线寻迹是应用一致性几何绕射理论分析电大尺寸目标电磁辐射和散射特性的关键,它的精度和速度对场值求解结果影响很大。根据反射定律,推导得出了球面反射点的参量必须满足的一元四次方程,通过求解方程得到球面反射点。给出了应用此方法得到的部分球面反射点,并给出了球柱模型附近半波振子天线的远场方向图。一致性绕射理论结果与FEKO仿真结果吻合较好。Ray-tracing is a key step to apply uniform geometrical theory of diffraction（UTD） in solving the problems of radi- ating and scattering by electrically large objects. An equation of one variable and four order for reflection points on spheres was deduced according to the reflection principle. Some reflection points were got based on the equation, and the far field pattern of a half-wave dipole near a sphere cylinder model was given. The UTD result is proved correct by comparing it with the FEKO result. Simultaneously the tracing time is dramatically reduced and the operational precision is improved.

关 键 词：一致性绕射理论 射线寻迹 球面反射点 天线 

分 类 号：TN820[电子电信—信息与通信工程]