用单极子阵列天线实现近场区电磁场调控

宋为佳; 文舸一

引用本文:	宋为佳，文舸一. 用单极子阵列天线实现近场区电磁场调控[J]. 雷达科学与技术, 2018, 16(6): 685-688.[点击复制]
	SONG Weijia, WEN Geyi. Controlling Electromagnetic Fields in Near-Field Region with a Monopole Antenna Array[J]. Radar Science and Technology, 2018, 16(6): 685-688.[点击复制]

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用单极子阵列天线实现近场区电磁场调控
宋为佳，文舸一
南京信息工程大学应用电磁学研究中心，江苏南京210044

摘要:

为了实现对阵列天线内部近场区域电磁场的控制，设计制作了一款工作频率为2.45GHz的低成本环形印刷单极子阵列天线。通过在需要加强电磁场预先设置的特定曲线上排布辅助偶极子天线阵列，利用两个阵列之间的功率传输效率最大化理论，得到印刷单极子天线阵列所需的最优化激励分布。基于上述方法，阵列天线近场区域的电磁场可以被调控成由预置曲线指定的任意不同形状。验证了电磁场分别被赋形为正方形、圆形和L形时的3种情况。

关键词: 单极子天线阵列功率传输最大化近场控制馈电电路

DOI：10.3969/j.issn.1672-2337.2018.06.018

分类号:TN82；TN957.2

基金项目:江苏省双创团队人才计划（No.SRCB201526）

Controlling Electromagnetic Fields in Near-Field Region with a Monopole Antenna Array

SONG Weijia, WEN Geyi

Research Center of Applied Electromagnetics, Nanjing University of Information Science and Technology, Nanjing 210044, China

Abstract:

In order to realize the control of electromagnetic (EM) fields in near-field region, a low cost quadrilateral printed monopole antenna array operating at 2.45GHz was designed and fabricated. By arranging an auxiliary dipole antenna array along a preset curve where the EM fields need to be strengthened, the optimal excitations required by the monopole antenna array can be evaluated under the condition that the power transmission efficiency between the two arrays is maximized. In this manner, the EM fields can be regulated into any desired shapes specified by the curve. Three design examples are presented to validate the method, in which the EM fields are shaped into a square, a circle, and a capital letter L respectively.

Key words: monopole antenna array power transmission efficiency near-field control feeding circuit