摘要
为了改进微波电路设计的数值仿真方法,在各向异性媒质条件下,将交替方向隐式算法用于时域有限差分方法,直接求解时域麦克斯韦方程,把二阶色散Lorentz媒质吸收边界条件推广到单轴各向异性情形.验证了色散媒质吸收边界的吸收效果比Mur和完全匹配层吸收边界更有效.通过对低通滤波器、贴片天线、线谐振器和螺旋电感等典型微带结构的数值仿真,验证了新提出方法的有效性.
In order to improve the simulation method of microwave circuits design, a new alternating-direction-implicit (ADI) scheme is applied to the finite-difference time-domain (FDTD) method in condition of anisotropy medium to solve the Maxwell′s equations in time domain. A second order derivative Lorentz medium absorbing boundary condition (ABC) is extended to uniaxial anisotropy. The absorption effect of this ABC is validated to be more efficient than that of Mur and perfectly matched layer ABC. Some microstrip structures such as low-pass filter, patch antenna, dielectric resonator, and rectangular spiral inductor are simulated by the presented ADI-FDTD method.The simulation shows the proposed method is effective.
出处
《天津大学学报（自然科学与工程技术版）》
EI
CAS
CSCD
北大核心
2005年第5期400-404,共5页
Journal of Tianjin University：Science and Technology
基金
中国博士后科学基金资助项目(2003033028)
关键词
各向异性
交替方向隐式算法
时域有限差分方法
有耗色散媒质吸收边界
微带结构
anisotropy
alternating-direction-implicit
finite-difference time-domain method
derivative lossy medium absorbing boundary
microstrip structures
