金属柜环境中的均匀场分布赋形阵列天线  

Shaped Array Antenna with Uniform Field Distribution in Metal Cabinet Environment

作　　者：夏志坚 蔡潇 文舸一[1] XIA Zhijian;CAI Xiao;WEN Geyi(Research Center of Applied Electromagnetics,Nanjing University of Information Science and Technology,Nanjing 210044,CHN)

机构地区：[1]南京信息工程大学应用电磁学研究中心,南京210044

出　　处：《固体电子学研究与进展》2022年第5期376-381,共6页Research & Progress of SSE

基　　金：国家自然科学基金青年科学基金项目(62101276);江苏省高等学校基础科学(自然科学)研究项目面上项目(21KJB510002);南京信息工程大学人才启动经费(1521082101016)。

摘　　要：针对近年来零售行业对标签识别自动化需求的增加和对标签读取准确度要求的提升,提出了一种可用于零售金属柜中的八单元近场射频识别阵列天线,实现目标识别范围内的均匀电场分布。为获得所需均匀近场电场分布的激励分布,通过在目标读写区引入多个测试接收天线,采用了最大功率传输效率法来获得最优激励分布,并通过设计馈电网络予以实现。天线的中心频率为922.5 MHz,天线系统主要由辐射部分和馈电部分组成,分别置于两个基板的顶部与底部。所设计的天线经过实验测试证明可以在金属柜环境中实现目标读写区域的均匀电场分布,波动范围不超过3 dB。In view of the increasing demand for tag identification automation and the improvement of tag reading accuracy in the retail industry in recent years,an eight-element near-field RFID array an-tenna which can be used in the retail metal cabinet is proposed to realize the uniform electric field distri-bution in the target identification region.In order to obtain the excitation distribution for the required uniform near-field electric field distribution,the method of maximum power transmission efficiency is used to obtain the optimized distribution of excitations by introducing multiple tests receiving antennas into the target reading area,and the optimized distribution of excitations can then be realized by a feed-ing network.The center frequency of the antenna is 922.5 MHz.The antenna system is mainly com-posed of radiating elements and the feeding network,which are respectively placed at the top and bot-tom of the two substrates.The experimental results show that the designed antenna can achieve uni-form electric field distribution in the target reading area in the metal cabinet environment with a small fluctuation of only 3 dB.

关 键 词：馈电网络 最大功率传输效率 金属柜 射频识别读写器天线 

分 类 号：TN820[电子电信—信息与通信工程]