%0 Journal Article
%T INVERSE FORMULATIONS FOR PERMITTIVITY MEASUREMENT OF GROUND MATERIALS USING SPACE-WAVE METHOD<br>空间波法测地物介电常数的反演方法
%A Xia Mingyao
%A Chen Zhiyu
%A <br>夏明耀
%A 陈志雨
%J 电子与信息学报
%D 1999
%I 
%X The space-wave method, suitable for extended surface targets, is a preferable method for permittivity measurement of ground materials at microwave frequencies. The inversion of permittivity from the measured data, which is established on using the Fresnel reflection coefficients, is easy if the measurement includes phase information. However, if the measured quantities are just the amplitudes of the reflected waves, the inversion will be much complicated by solving a quadratic nonlinear equation set, and so far only numerical iterative approaches have been reported in the literature. Unfortunately, the iterative process is highly unstable because of the extremely sensitivity of the inverse algorithms to the measured data and even to the iterative initial values. In the present work, analytical inverse formulations are presented which will give a unique inverse result if it does exist for a set of measured data. Error sensitivity of the inversion to the measurement errors are performed, as well.
%K Space-wave method
%K Permittivity of ground materials
%K Analytical inverse methods
%K Error sensitivity<br>空间波法
%K 地物介电常数
%K 解析反演法
%K 误差分析
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=1DE0375E2ABACD5588076C31DE87F0F6&yid=B914830F5B1D1078&vid=659D3B06EBF534A7&iid=0B39A22176CE99FB&sid=10828928EB89AD8E&eid=4290346F7268639E&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=12