MIMO Antennas Design Development and Implementation using Printed Monopole Antennas

Abstract

Of particular interest is MIMO antennas, which, due to their various advantages compared to the single antenna system, find their utility in many wireless technologies, where high data rate with low latency is attracting more attention after 4G toward 5G and beyond. Because of that, implementing need of a multiple antenna system with low correlation in place of a single antenna in the transmitter and/or receiver of the user devices is rapidly growing. Still, the area available to integrate the multiple antenna elements inside the compact/low-profile devices is minimal. For completion of this task, the antenna elements should be highly compact, low-profile, and closely spaced. Consequently, the mutual coupling/correlation between antenna elements is highly increased; hence the antenna performance degraded. Therefore, a compact/low-profile high-order MIMO antenna system with low coupling/correlation between antenna elements has a great potential for extremely high data rates with throughput. In this thesis, the research studies are primarily focused on the development and implementation of some novel highly-isolated/compact/low-profile 2-element/4-element MIMO antenna, which is utilized to realize the high-order MIMO antennas such as 12- element, 20-element, and 32-element for different wireless application-based user s devices, i.e., smartphone, localization system, vehicular, and smartphone s back cover. The number of MIMO antenna elements increases with satisfactory performances without compromising any aspects in the chapter-wise studies, including four different MIMO topologies applicable for the modern communication spectrum, i.e., 5G sub-6 GHz (new radio), wideband, ultra-wideband, 5G sub-6 GHz and mm-Wave (new radio). These antennas simulation studies were carried out using the 3D electromagnetic simulator Ansys HFSS version 2020 R1, and the results are validated in calculations and measurements. The investigations of which are carried out in different chapters that integrate the present thesis. newline