Antenna Diversity in Mobile Phone

In the new generation of mobile communication systems, high data transmission rate and low bit error probability have been common requirements. However the issue of signal fading in a multi-path environment still stands as an major problem. Using antenna diversity techniques can overcome the problem. The main purpose of this thesis work is to implement receiver antenna diversity in a mobile terminal and to study the diversity performance of the diversity antenna system. In this thesis work, simulated and measured correlation coefficient and diversity gain have been studied and compared, under the assumption of the uniform distributed propagation model. The results confirmed the equivalence of correlation coefficient calculated from far-field patterns and from S parameters. Low correlation coefficient and high diversity gain are obtained in some placements of the diversity antenna. Improvement of correlation can be obtained from the implementation of the matching networks. The purpose of this thesis is to implement receiver diversity antenna in mobile phone as a promising way to improve the antenna performance at the mobile terminals. This report summarizes the results of the theoretical studies, simulations and measurements of evaluating the antenna diversity performance.