Isolation Improvement of Multiband Fractal MIMO Antenna for Wireless Applications

Abstract

A multiband fractal multiple input multiple output antenna is discussed in this paper. The use of MIMO antenna in wireless application is key technique to improve the capacity rate of the channel. However, the use of multiple antenna elements in smaller physical area will cause the antenna performance degradation which happens due to mutual coupling between the antenna elements. The design of MIMO antenna with less mutual coupling is the major challenge. The MIMO antenna is designed to operate four bands of frequencies i.e. in lower WiMax, middle WiMax, Satellite TV and X-Band applications. The proposed antenna exhibits acceptable S-parameter values, low envelope correlation coefficient over the four bands of frequencies. Obtained envelope correlation coefficient for designed MIMO antenna is less than 0.1.