Authors: Muhammad Umar Khan
Source: FERMAT, Volume 33, Communication 2, May.-Jun., 2019
Abstract: A new technique to design MIMO antennas with superior performance in terms of correlation coefficient is discussed in this presentation. Unlike the conventional approach where port isolation is increased to reduce correlation coefficient, the proposed approach adopts decorrelation of the radiation patterns of individual elements. To achieve this, a phase-gradient partially reflective surface (PRS) is used as a superstrate above the antenna elements in a low profile Fabry-Perot (FP) cavity configuration. The effectiveness of the method is demonstrated by designing the system for a two-element MIMO antenna at 5.25 GHz and a four-element MIMO antenna at 10 GHz. The proposed technique results in more than 95% reduction in the correlation coefficient value, thus projecting better MIMO performance. The proposed technique can be easily used to design radome enclosed MIMO antennas.
Index Terms: Multiple-input-multiple-output (MIMO), Correlation Coefficient, Fabry-Perot Cavity Antenna, Partially Reflective Surface (PRS)
View PDFA New Approach to Design MIMO Antennas using FSS with Improved Performance