【摘要】 作为一种新型的电磁材料,左手材料的电场E、磁场H、波矢K之间呈现出一种左手关系,它在电磁波的某些频段下能够产生负介电常数和负磁导率,这一特性应用于天线设计,可以改善其方向性。考虑在RFID读写器天线中添加左手材料层,从负Snell折射效应、聚焦电磁波"成像"角度解释方向性增强特性,并以不停车收费系统(ETC)、巡检机器人大角度扫描应用场景为例,对该材料替代天线阵及有源标签作了可行性分析。更多还原

【Abstract】 LHM is a new style of electromagnetic modeling of supernatural material. Due to the double-negative, antennas with LHM covers have special properties, such as high directivity. RFID reader antennas with LHM covers are considered. The physical reasons for the improvement in the pattern are given especially with negative-Snell effect and the imaging of a parallel-sided slab illuminated by a monochromatic source on the far side. Feasible analysis are given in this paper for the usages of LHM covers in ETC and navigation control of inspection robot. By the way, the prospects of active tags substitution for LHM covers on passive tags are also under considered.更多还原