This paper discussed the loss effect to material electromagnetic properties in new microstructure materials .As production processes and technology are rising ,people set an status and the value of the study to microstructure materials .Usually ,the main raw material is metal ,but the loss is im possible to metal .The effect of loss to materials performance has become the hot topic .This led us to the conclusion that the loss can bring about not only negative effects but also positive effects .Seeping analysis to electrodynamics practical lessons has both widened students′ range of knowledge ,and promoted student′s aptitude of creation .%本文主要介绍了新型人工微结构材料中损耗对材料性能的影响。随着生产工艺和制备技术的提升，使新型人工微结构电磁材料获得了特殊的研究地位和研究价值。通常人工微结构材料的制备原材料都是取自于金属材料，而对于金属材料，损耗是不可避免的。那么损耗对微结构材料性能的影响成为人们关注的热点。通过研究材料电磁损耗的物理机制得出损耗虽然对电磁材料的应用带来负面效应，但是在特殊材料结构中损耗反而是有益的。将分析过程及结果渗透到本科物理学专业《电动力学》的实践课中，不仅拓宽了学生的知识面，而且提升了学生的创新能力。
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