Development of compact wide band antennas with diversity techniques for mimo communications in scattering environment

Abstract

In recent years, wireless technology has seen numerous notable newlineadvancements. The major problem in antenna design is to provide a consistent newlineperformance throughout the desired band. Smaller antennas are required by newlinerecent wireless technology in order to be compatible with portable devices. newlineMicro strip antennas are noted for their light weight, adaptability to newlinemounting hosts and ease of production. However, they ensure limited newlinebandwidth and gain, which limits their application in communication systems. newlineUWB technology has a number of advantages, including a high data rate , low newlinepower consumption, low cost. The spectrum of a UWB system is bigger in newlinescale and need high power output than that of narrowband systems. newlineMIMO technology increases the channel capacity by employing newlinemultiple antennas. Reduction of mutual coupling with high isolation is the newlinegreater concern in MIMO systems.Apart from this, the main challenge in designing MIMO antennasystems is correlation between the radiating elements. Pattern and newlinepolarization diversity are the solution to reduce the correlation between newlinereceived signals, which utilize the orthogonal patterns and orthogonal newlinepolarizations as a means to create uncorrelated channels. newlineTherefore, considering all the issues, there is a need to focus on newlinedesign of MIMO antennas which is compact as well as provide minimum newlinecorrelation between the signals to achieve maximum transmission capacity. newlineHence this research work addresses the development of novel compact UWB newlineMIMO antenna that exploits polarization and pattern diversity to make the newlinesystem robust to multipath fading channels in a rich scattering environment newline newline