摘要
本文基于时域有限积分技术(TDFIT)分析了不同湿度树叶在太赫兹波段透射特性。树叶的材质特性采用描述连续水粒子分布的双色散模型,计入树叶含水量(湿度)对电磁参数的影响。树叶几何模型采用NURBS曲面建模,并对树叶表面进行粗糙化处理。为了精确描述树叶微小起伏及其连续材质分布,引入了共形时域有限积分技术,有效保证了计算精度和计算效率。对干树叶和湿树叶在THz照射下的透射特性进行仿真对比,随着水分的增大,太赫兹波的穿透能力下降。仿真结果并与实验结果进行比对,证实了电磁建模方法和计算算法的有效性。
This article demonstrates different transmission characteristics with different moisture rate foliage in Terahertz band via adopting the time-domain finite integral technique(TDFIT). Thereinto, the material characteristics are represented by the double dispersion model with continuous water particle distribution, and the double dispersion model has involved the impact which foliage's moisture rate posed on electromagnetic parameter. The geometric models of foliage are represented with NURBS curve modeling, in which foliage's surface has been roughened. The article uses the common time domain integral technique to precisely describe the petty fluctuation of foliage surface and continuous material distribution, which improves the computation accuracy and efficiency effectively. This article eventually demonstrates the validity of the electromagnetic modeling method and the computation algorithm based on the contrastive analysis of simulation results and experimental results.
出处
《微波学报》
CSCD
北大核心
2015年第S1期56-60,共5页
Journal of Microwaves
关键词
时域有限积分技术
透射特性
太赫兹波段
Time domain finite integral technique
transmission characteristics
Terahertz band
