摘要
采用水平极化方式,在微波暗室中对试样进行了雷达散射截面（RCS）测试.结果表明：在8~18 GHz频率范围内,集料类型对电磁波反射率几乎无影响,多孔混凝土具有良好的吸波性能,其电磁波反射率小于-10 dB的波带宽度达到10 GHz,且平均反射率小于-20 dB;在一定范围内,增加孔隙率和集料粒径可改善多孔混凝土表面阻抗和自由阻抗的匹配性,降低电磁波的反射率.
The radar cross section（RSC） of samples was tested in a microwave anechoic chamber.Influences of porous structure on electromagnetic wave absorption properties of porous concrete were investigated,and influences of porosities, types of aggregate and aggregate size on electromagnetic wave absorption properties of porous concrete were studied.The results show that porous concrete exhibites perfect wave absorption properties.Types of aggregate nearly have no effect on wave absorption properties.For porous concrete,the reflection loss is less than-10 dB in 8～18 GHz,and the average reflection loss is less than-20 dB.Aggregate size and porosity are the key factors for reflection loss.The matching ability of surface impedance and free space impedance can be improved and reflection loss of electromagnetic wave can be decreased by increasing aggregate size and porosity in a certain range.
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2010年第2期165-168,共4页
Journal of Building Materials
基金
江苏省自然科学基金重点资助项目(BK2005216)
国家自然科学基金资助项目(50178044)
关键词
多孔混凝土
反射率
孔隙率
集料粒径
porous concrete
reflectivity
porosity
aggregate size
作者简介
第一作者：梁丽敏（1976-），女，河北兴隆人，南京航空航天大学博士生．E—mail：lianglimin2003@sina．com
