Design and Development of High Gain MIMO Antennas for 5G and UWB Applications

Abstract

Multiple-input-multiple-output (MIMO) system deploys multiple newlineantennas at the transmitter and reception ends. Without needing extra newlinespectrum or power, MIMO-based antenna systems will dramatically newlineincrease data speed, spectrum efficiency, and wireless communication newlinereliability. Massive MIMO has reached new heights annually since its newlineintroduction a few years ago. It has become one of the hottest research newlinetopics in the wireless communication community due to its immense newlinebenefits in 5G standardization. This study was inspired by the need for newlineeffective MIMO communications and offers new insights into the design of newlinecompact and decoupled multiple antennas. newlineThis thesis proposes four unique compact quad element MIMO newlineantennas that make use of spatial diversity, spatial multiplexing and other newlinediversity techniques to fully leverage the degrees of freedom available newlinebetween the multiple antenna components. MIMO technology is combined newlinewith several sophisticated antenna technologies and metamaterial newlinetechnologies and their potential is explored in this thesis. Instead, newlinemetamaterial technologies like Reactive Impedance Surface (RIS), newlineFrequency Selective Surfaces (FSS), and Composite Right Left Hand newlineTransmission Line (CRLH-TL) etc. should be incorporated into the MIMO newlinein order for it to meet the higher standards required by more advanced newlineapplications like 5G. The proposed designs are optimised for 5G and UWB frequencies newlinebelow 6 GHz. It also supports wireless communication technologies such as newlineISM, Wi-Fi, Wi-Max, WLAN etc. Key aspects affecting the efficiency of newlinemulti-antenna systems are also examined in depth. Figure of merit newlinecharacteristics like as mutual coupling, envelope correlation coefficient, newlinechannel capacity, and throughput are used to assess MIMO diversity and newlinesystem performances. The purpose of this thesis is to analyze and improve newlinethe MIMO/diversity performance of multiple antenna systems for future newlinewireless communication. newline