Isolation Enhancement of Wide-Band MIMO Array Antennas Utilizing Resistive Loading

被引：48

作者：

Park, Jung-Dong ^{[1
]}

Rahman, Muhibur ^{[1
]}

Chen, Hsiang Nerng ^{[1
]}

机构：

[1] Dongguk Univ, Div Elect & Elect Engn, Seoul 04620, South Korea

来源：

IEEE ACCESS | 2019年 / 7卷

基金：

新加坡国家研究基金会;

关键词：

Antenna arrays; multiple-input multiple-output (MIMO); mutual coupling; MUTUAL COUPLING REDUCTION; RESONATOR DECOUPLING NETWORK; SYSTEM; SUPPRESSION; PERFORMANCE;

D O I：

10.1109/ACCESS.2019.2923330

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In this paper, we propose the use of resistor-loaded paired parallel-coupled resonators (PCRs) for mutual coupling reduction and isolation enhancement in wideband MIMO array antennas. It was shown that the isolation enhancement using a conventional PCR structure was drastically degraded in the middle of the frequency band. By placing an optimally designed resistor between the PCRs, we can improve the isolation considerably, compared with the simple PCR structure. Moreover, it could also improve the diversity parameters, such as envelope correlation coefficient (ECC), diversity gain (DG), and channel capacity loss (CCL). The validity of the proposed resistor-loaded PCR technique was verified with ultra-wideband array antennas with 1 x 2 and 1 x 4 patch array configurations, achieving a 0.125 lambda(0) center-tocenter spacing between narrowly spaced patches and isolation better than 25 dB within the range 3-9-GHz without any degradation in its frequency response, radiation patterns, or diversity parameters. The presented results confirm that the proposed technique is suitable in various MIMO systems applicable for wireless local area networks (WLANs), long-term evolution (LTE), and possibly fifth-generation (5G) communication due to the compact size and improved isolation performance.

引用

页码：81020 / 81026

页数：7

共 32 条

[1] Mutual-Coupling Isolation Using Embedded Metamaterial EM Bandgap Decoupling Slab for Densely Packed Array Antennas [J].