Wireless Communication Center, School of Electrical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia.
Advanced Cyclotron Systems Inc. (ACSI), Richmond, BC V6X 1X5, Canada.
Sensors (Basel). 2023 Jan 9;23(2):747. doi: 10.3390/s23020747.
In response to the increasing demand for voice, data, and multimedia applications, the next generation of wireless communication systems is projected to provide faster data rates and better service quality to customers. Techniques such as Multiple-Input-Multiple-Output (MIMO) and diversity are being studied and implemented to meet the needs of next-generation wireless communication systems. Embedding multiple antennas into the same antenna system is seen as a promising solution, which can improve both the system's channel capacity and the communication link's quality. However, for small handheld and portable devices, embedding many antennas into a single device in a small area and at the same time providing good isolation becomes a challenge. Hence, designing a shared antenna system with multiple feed ports with equivalent or better performance characteristics as compared to the approach of multiple antennas with multiple feed ports is a promising advantage which can reduce the size and cost of manufacturing. This paper intends to provide an in-depth review of different MIMO antenna designs with common radiators covering various antenna design aspects such as isolation techniques, gain, efficiency, envelope correlation coefficient, and size, etc. There is also a discussion of the mathematical concepts of MIMO and different isolation techniques, as well as a comparative analysis of different shared radiator antenna designs. The literature review shows that only very few antennas' design with common radiator have been suggested in the available literature at present. Therefore, in this review paper, we have endeavored to study different antennas' designs with common radiator. A comparison is provided of their performance improvement techniques in a holistic way so that it can lead to further develop the common radiator multiport antenna systems and realize the promising advantages they offer.
为了满足下一代无线通信系统对语音、数据和多媒体应用的需求，预计下一代无线通信系统将提供更快的数据速率和更好的服务质量。多输入多输出（MIMO）和分集等技术正在被研究和实施，以满足下一代无线通信系统的需求。将多个天线嵌入到同一个天线系统中被视为一种有前途的解决方案，它可以提高系统的信道容量和通信链路的质量。然而，对于小型手持和便携式设备，在小面积内嵌入许多天线并同时提供良好的隔离是一项挑战。因此，设计具有多个馈电端口的共享天线系统，与具有多个馈电端口的多个天线相比，具有相同或更好的性能特性，这是一个很有前景的优势，可以降低制造的尺寸和成本。本文旨在深入研究不同的多输入多输出天线设计，共同的辐射器涵盖各种天线设计方面，如隔离技术、增益、效率、包络相关系数和尺寸等。本文还讨论了多输入多输出的数学概念和不同的隔离技术，并对不同的共享辐射器天线设计进行了比较分析。文献综述表明，目前可用文献中仅提出了少数几个具有共同辐射器的天线设计。因此，在这篇综述论文中，我们致力于研究具有共同辐射器的不同天线设计。以整体的方式比较了它们的性能改进技术，以便进一步开发共同辐射器多端口天线系统，并实现它们提供的有前途的优势。
