蝶形天线的计算机仿真设计

Simulation and Design of bow-tie antenna using Computer

蝶形天线是在脉冲型探地雷达中广泛采用的一种宽带天线。本文采用时域有限差分算法(FDTD)结合PML吸收边界条件分析了蝶形天线在高斯脉冲激励下的时域特性,通过傅立叶变换,计算出天线的方向图和在不同频率下的输入阻抗,结果表明FDTD算法用于分析蝶形天线是有效的。

Bow-tie antennas are broadband antennas which are widely used in the impulse ground-penetrating radar（GPR）. The bowtie antenna excited by a Gaussian pulse is analyzed by using the finite-difference time-domain method （FDTD） with the perfectly matched layer（PML） absorbing boundary condition in this paper. By employing the Fourier transform, the input impedance characteristics and radiation patterns are simulated.