基于无穷小偶极子等效模型的电大射频识别读写器近场天线研究

Electrically large radio frequency identification (RFID) near field reader antenna based on infinitesimal dipole equivalent modes will be studied under internet of things. Depending on the inaccuracy and high complexity of traditional numerical algotithm in analyzing near field antenna, by exploting the specturm expasion of dyadic Green’s function and field distribution character of near field antenna, we will focus on coupling mechanism and field distribution of near field RFID system, electrically large near field reader antenna, and scalable operation field near field antenna. Some new concepts, theories, methods, and algorithms are hopeful to be proposed under the support of this project. Key scientific problems to be solved are involved in high precision modeling of coupling between reader and tag and field construction of near field antenna for the goal of large reading range. We will try to achieve some innovative algorithms and conclusions of exact computation of near field RFID coupling with complex boundary condition, joint optimization of bandwidth and field strength of electrically large antenna，multiple operation area expansion of near field antenna without support of power splitter. The innovation of this project will rise the accuracy of reading tag, design precision of reader antenna, and lay a strong foundation for RFID system with fineness and sensitivity in complex application environment.

本项目拟以物联网技术发展为背景，开展基于无穷小偶极子等效模型的电大射频识别读写器近场天线技术，针对现有数值算法在分析近场天线方面精确度不足和复杂度过高的问题，充分利用并矢格林函数展开与近场天线的场分布特点，重点开展包括射频识别系统近场天线场分析和耦合理论、电大均匀场读写器近场天线、可扩展工作场区近场天线的内容研究，探索新概念，掌握新原理，提出有效的近场天线新结构、新设计以及新算法。拟解决的关键科学问题包括近场天线和标签耦合的高精度建模问题、以大区域访问为目标的近场天线电磁场构建问题。力求在复杂边界条件下的射频识别系统近场耦合精确算法、带宽和场强联合优化的电大近场天线设计、无功分网络支撑的近场天线多区域工作能力扩展方面取得创新性成果，为射频识别系统读写器近场天线研究奠定理论基础，提升近场标签读取准确度，提高读写器天线的设计精度，使未来具备高精细度和灵敏度的新型射频识别系统具备关键技术支撑。

本项目以物联网技术发展为背景，开展了基于无穷小偶极子等效模型的电大射频识别读写器近场天线技术研究。针对现有数值算法在分析近场天线方面准确度不足和复杂度过高的问题，充分利用并矢格林函数展开与近场天线的场分布特点，开展了包括射频识别系统近场天线场分析和耦合理论、电大均匀场读写器近场天线、可扩展工作场区近场天线的内容研究。相关成果解决了近场天线耦合分析建模和以大区域访问为目标的近场天线设计方法等关键科学问题。在复杂边界条件下的射频识别系统近场耦合精确算法、带宽和场强联合优化的电大近场天线设计、近场天线多区域工作能力扩展方面取得了创新性成果，为射频识别系统读写器近场天线研究奠定了理论基础。本项目所设计的近场天线应用于射频识别系统，使系统提升了近场标签读取范围及准确度，相关设计思路拓宽了读写器天线的设计方法，使未来具备高精细度和灵敏度的新型射频识别系统具备了关键技术支撑。本项目的研究成果发表相关学术论文17篇，其中SCI论文13篇，EI论文4篇，并申请专利1项。部分研究成果应用于射频识别标签测试系统，取得了良好的应用效果。