FDTD Modeling of Tree-Trunk Scattering at VHF/UHF

TAN Huai-ying; LIU Ke-cheng; YIN Jia-xian; LIANG Dian-nong

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FDTD Modeling of Tree-Trunk Scattering at VHF/UHF

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- FDTD Modeling of Tree-Trunk Scattering at VHF/UHF
- Acta Electronica Sinica Vol. 31, Issue 3, Pages: 448-451(2003)
- 作者机构：
  
  1. 空军第二研究所,北京,100085
  2. 国防科技大学电子科学与工程学院,湖南,长沙,410073
  3. 空军第二研究所北京,100085
  4. 国防科技大学电子科学与工程学院湖南长沙,410073
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN011
- Published：2003
- 稿件说明：
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TAN Huai-ying, LIU Ke-cheng, YIN Jia-xian, et al. FDTD Modeling of Tree-Trunk Scattering at VHF/UHF[J]. Acta Electronica Sinica, 2003, 31(3): 448-451.
DOI：

TAN Huai-ying, LIU Ke-cheng, YIN Jia-xian, et al. FDTD Modeling of Tree-Trunk Scattering at VHF/UHF[J]. Acta Electronica Sinica, 2003, 31(3): 448-451. DOI：

摘要

本文用时域方法研究了树干的超宽带散射特性.由于树干及地面均为色散有耗媒质

因此树干散射特性是复杂的频率函数.时域有限差分算法(FDTD)尤其适合于此类具有色散特性的超宽带散射特性研究.运用FDTD算法建立起树干散射模型后

经过计算

可以得到整个时域过程的散射

对时域散射场进行快速傅立叶变换(FFT)

则可获取全部感兴趣的超宽带频域特性.相对于矩量法(MOM)而言

FDTD能更方便快捷地为叶簇穿透(FOPEN)检测目标提供全面的时频信息.

Abstract

This paper presents our global approach to model Ultra Wideband (UWB) FOPEN (Foliage Penetration).In this approach

we consider plane wave scattering (in time domain) from the tree trunks above the soil.The time-domain scattering is computed via FDTD method

which is particularly well adapted to frequency-dependent soil.Then with a Fast Fourier Transform (FFT)

the FDTD result is transformed to the frequency domain.Thus

we may have rich information for applicability to the FOPEN detection need.

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