Revisit to mutual coupling effects on multi-antenna systems

被引：0

作者：

Chen, Xiaoming ^{[1
]}

Pei, Huiling ^{[1
]}

Li, Mengting ^{[1
]}

Huang, Huilin ^{[1
]}

Ren, Quanxin ^{[1
]}

Wu, Qi ^{[2
]}

Zhang, Anxue ^{[1
]}

Kishk, Ahmed A. ^{[3
]}

机构：

[1] School of Information and Communications Engineering, Xi’an Jiaotong University, Xi’an,710049, China

[2] Faculty of School of Electronics and Information Engineering, Beihang University, Beijing,100191, China

[3] Department of Electrical and Computer Engineering, Concor-dia University, Montreal,H3G 1M8, Canada

来源：

Journal of Communications and Information Networks | 2020年 / 5卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Microstrip antennas - Radiation efficiency - Antenna phased arrays - MIMO systems - Scanning antennas;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

—Due to space limitation, mutual coupling occurs almost invisibly in array antennas. In this paper, the mutual coupling effects on the two most popular categories of array antennas, i.e., phased arrays and multiple-input multiple-output (MIMO) antennas, are reviewed. Some misconceptions regarding the mutual coupling effects are uncovered. It is shown that the steering pattern of a phased array at an arbitrary scanning angle can be readily calculated once the embedded radiation patterns of the array elements (including the mutual coupling effect) are obtained. As antenna spacing decreases, absorption loss increases, yet the phase terms tend to add up constructively as antenna spacing reduces, which may overcompensate the absorption loss due to mutual coupling. Thus, the array efficiency may be increased by reducing the antenna spacing. A patch antenna array is used to illustrate this phenomenon. It is further shown that while mutual coupling tends to reduce the correlation of two-element arrays, it has a negligible effect on the overall correlations of larger arrays. Finally, various mutual coupling reduction techniques are briefly presented. Two feasible techniques for large planar arrays are used to illustrate the benefits of array decoupling. © 2020, Posts and Telecom Press Co Ltd. All rights reserved.

引用

页码：43 / 54