摘要
随着近年来超材料技术的迅猛发展,对超材料有效电磁参数的测量精度也要求越来越高。研究了超材料的有效电磁参数的测试技术,提出了利用自由空间法来测试超材料的有效电磁参数。与其它测试方法相比,自由空间法是一种非接触和非破坏性的测试方法,对测试材料样品没有非常严格的形状和工艺要求,只需厚度均匀且具有一定大的测试面积,以避免边沿绕射。探讨了在参数反演过程中产生的多值问题和相位模糊问题,并通过理论分析给出了一种有效的解决力案。用自由空间法测量了超材料样品在(8 GHz-14 GHz)的有效电磁参数,并和波导法的测试结果进行了比较。结果表明自由空间法测试超材料的电磁参数是正确可靠的,具有实用价值。
With the rapid development of meta- materials, the requirements for the precision of measurement of the effective electromagnetic parameters become increasingly high. A research on the measurement of the effective electromagnetic parameters has been made and free -space method is presented. Compared with other methods, this free -space method is a untouchable and nondestructive test method , and when using this method, the sample is not strictly required in shape and technology but it should be homogeneous in thickness and big enough in test area to avoid diffraction effects at the edges. An effective way is proposed for solving the multi - valued problem and phase - shift ambiguity problem in the parameter inversion process by the theoretical analysis. The effective electromagnetic parameters of air and meta - material samples are tested by using the free - space method, and in compar- ison with the results of the wave- guide method in the band （8 GHz- 14 GHz）, the results indicate that this test method is correct, reliable and practical.
出处
《空军工程大学学报（自然科学版）》
CSCD
北大核心
2008年第5期86-90,共5页
Journal of Air Force Engineering University(Natural Science Edition)
基金
国家自然科学基金资助项目(10474077
50632030)
陕西省自然科学基金资助项目(2006E1135)
关键词
自由空间法
波导法
超材料
电磁参数
free - space method
wave - guide method
meta- materials
electromagnetic parameters
