二元紧耦合多入多出系统解耦匹配网络  

Decoupling-matching network for two-element closely coupled multiple-input multiple-output systems

作　　者：李方华 李岳衡[1] 张燕华 薛团结 周思源 LI Fanghua;LI Yueheng;ZHANG Yanhua;XUE Tuanjie;ZHOU Siyuan(College of Computer and Information,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学计算机与信息学院,江苏南京211100

出　　处：《哈尔滨工程大学学报》2020年第4期583-588,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(61701168,61832005,61571303);中央高校基本科研业务费项目(2019B15714,2019B15614).

摘　　要：多入多出传输技术应用在小尺寸移动终端时将引发阵元间强烈的电磁耦合效应,进而影响系统传输速率的问题。为消除耦合效应的不利影响,本文依据微波电路理论设计了二元微带阵列解耦匹配网络。该方法通过在小尺寸阵元间添加电感元件以抑制耦合,再通过单枝节匹配网络解决由解耦引起的输入与输出端口间的阻抗失配问题。计算机电磁软件仿真和电路实测结果表明:用以指导二元解耦匹配网络设计的理论分析可靠准确,所设计的二元解耦匹配网络微带电路实现结构简单,能很好地完成紧耦合阵元间的耦合抑制作用。Applying multi-input multi-output technology in a small mobile terminal will inevitably cause strong electromagnetic coupling among the array elements, which will thereby affect the system′s transmission rate. To eliminate the adverse effects of coupling, we designed a specific binary microstrip-array decoupling-matching network based on microwave circuit theory. The proposed method first suppresses the mutual coupling by inserting an inductance component between small array elements, and then solves the impedance mismatch between the input and output ports caused by the decoupling operation through a single-stub matching network. Both computer simulations and field tests show that the designed decoupling-matching network with a simple layout structure can effectively suppress the coupling between closely coupled array elements.

关 键 词：多入多出 移动终端 电磁耦合 耦合抑制 匹配网络 阻抗失配 微带电路 现场测试 

分 类 号：TN911.2[电子电信—通信与信息系统] TN929.5[电子电信—信息与通信工程]