三维形体变换-时域有限差分法研究并以之设计微带天线

A novel algorithm is presented in the project, namely, Thompson-FDTD method , which combines the differential-Thompson transformation involved in hydromechanics with the finite difference time domain (FDTD) technique involved in electromagetics. It is able to accurately match the boundary conditions by transformed an arbitrary shaped body into a regular structure and the mesh arrangement can be adjusted according to the scatterer's shape to achieve better numerical accuracy. Additional, the time-domain MEI absorbing boundary conditions and a conformal microstrip antenna are developed. The feasibility of the novel algorithm is proved by the numerical results and actual experiment.

本项目首次把流体力学领域的形体微分变换方法与电磁学领域的时域有限差分结合起来，进行交叉学科研究，创造出一种新的数值计算方法。利用该方法进行分析和设计，可以较精确和细致地模拟具有复杂结构的共形微带天线的辐射特性，较准确地预估其性能指标，有利于我们研制出在高速飞行物上具有广泛用途的高性能圆锥面共形微带天线。