摘要
探讨了冻土介电常数的测量方法,通过实验初步研究了冻土介电常数随频率、温度和含水量的变化规律.
Dielectric constant is a critical parameter in establishing microwave emission and scatter model of frozen soil. The phase transition in soil water results in a big change of the dielectric constant for frozen soil owing to the big difference of the dielectric constant between liquid water （80） and ice （3.15）. In order to further understand the dielectric properties of frozen soil, a laboratory experiment is carried out to measure the dielectric constant of frozen soils. The soil samples are taken from wali in Chaoyang District of Beijing. Temperature controllers are used for Laboratories to control the temperature of soil from 248 K to 293 K to make the frozen soil artificially. The complex dielectric constant of soil samples are measured by an Agilent PNA Network Analyzer E8362B in 1-20 GHz frequency range. The coaxial probe technique combined with a high temperature probe is used in the experiment.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第3期241-244,共4页
Journal of Beijing Normal University(Natural Science)
基金
长江学者和创新团队发展计划资助项目(PCSIRT)
关键词
介电常数
冻土
未冻水含量
dielectric constant
frozen soil
unfrozen water constant
