摘要
利用MOM研究了不同土壤类型的有耗介质粗糙地面与其下方埋藏金属目标的复合电磁散射问题,在数值计算中,引入了锥形入射波以减少粗糙面模拟中由于人为截断所引起的计算误差。当给定入射波频率、土壤成分及土壤温度和土壤湿度后,可以根据相关模型计算出土壤的相对介电常数。数值结果以二维无限长导体圆柱为例,利用Monte-Carlo方法统计计算了双站复合散射截面随土壤湿度、均方根高度的变化情况,并做了详细分析及讨论。
The problem of the composite electromagnetic scattering from buried perfect electrically conducting(PEC) target at the randomly rough surface with lossy media different in different types of soil are solved by the method of moments, while the tapered incident wave is chosen to reduce the truncation error.The relative dielectric constant of the soil could be calculated according to the frequency of the incident wave,the soil components,the soil moisture and soil temperature based on some model.The Monte-Carlo procedure is employed to calculate the bistatic scattering cross section,which is dependent on the soil components,the soil moisture,the frequency of the incident wave,as well as the height rms of the randomly rough surface in details.The numerical results have directive significances in the application of ground penetrating radar in mining, archeology.
出处
《微波学报》
CSCD
北大核心
2010年第S2期21-24,共4页
Journal of Microwaves
基金
国家自然科学基金(60971067)
国家自然科学基金(60671057)
中央高校基本科研业务费专项资金资助(72105486)
高等学校博士学科点专项科研基金(20070701010)
关键词
粗糙地面
土壤类型
相对介电常数
四成分模型
矩量法
Rough surface
Soil type
Relative dielectric constant
Four component model
Method of moments
