近场目标自适应聚焦天线  

Antenna with adaptively focusing on near-field target

作　　者：王身云[1,2] 郑淏予 李阳 Wang Shen-Yun;Zheng Hao-Yu;Li Yang(Research Center of Applied Electromagnetics,Nanjing University of Information Science and Technology,Nanjing 210044,China;School of Electronic and Information Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学应用电磁研究中心,南京210044 [2]南京信息工程大学电子与信息工程学院,南京210044

出　　处：《物理学报》2020年第21期348-353,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61971231)资助的课题.

摘　　要：为了对位于天线近场区的目标进行定位和能量传递,提出了一种近场目标自适应聚焦天线的设计原理.当无源目标位于阵列天线近场区域时,通过检测发射阵列天线到接收天线之间的电磁散射参数,建立发射阵列天线到接收天线之间的功率传输方程,通过特征值方法优化求解功率传输效率的最大值,即可获得发射阵列天线在目标位置产生聚焦效应的激励分布.实验过程中,随机预设了多个不同位置、不同电磁参数和不同形状的近场目标,均获得了与预设目标位置相符合的电场聚焦分布效果.该近场目标自适应聚焦天线能够有效地将辐射电场聚集到位于近场区域的随机目标位置,从而实现目标的定位、跟踪和能量传递,聚焦效应对近场目标的位置、形状和电磁参数均不敏感.To realize near-field target localization and power transfer,an adaptively focusing antenna array is proposed.When a passive target is localized within the near-field zone of an array antenna,the optimal excitation distribution for focusing power onto the object can be obtained by solving an eigenvalue equation,which is established with the tested scattering parameters of the array antenna network.We randomly preset a number of targets with various shapes,materials and positions in the near-field zone,and the corresponding electric field focusing distribution is consistent with the preset target positions.Hence,the proposed near-field adaptively focusing array antenna can automatically focus its radiation onto any target,and such a feature can realize the target localization,tracking and power transfer in the near-field zone of the array antenna.

关 键 词：自适应天线 阵列聚焦天线 目标定位 

分 类 号：TN820[电子电信—信息与通信工程]