Four Elements UWB MIMO Antenna Array

A simple method for designing a quad antenna element Ultra Wideband (UWB) Multiple Input Multiple Output (MIMO) antenna is presented in this work .The presented quadelement UWBMIMO antenna is printed on substrate FR4having the dimension of 110×119×1.5 mm3.The four elements of antenna are orthogonally positioned with each other for improving isolation. For achieving further isolation between elements of antenna, a metallic parasitic strip having plus shape is printed in ground. The proposed antenna design has obtainedS11<-11.4 dB at all four ports, insertion loss<-20.5 dB and additionally, attained almost omnidirectional pattern of radiation across the whole impedance bandwidth (2.43to 18.3 dB).Also, high diversity performance is obtained by proposed antenna design based on Envelope Correlation Coefficient (ECC<0.0003), Total Active Reflection Coefficient (TARC<-8.68 dB), Diversity Gain (DB ≈10) throughout the bandwidth, Multiplexing Efficiency(-0.15 to-1.3 dB), Mean Effective Gain Ratio (0.97 to -0.97dB ) and Channel Capacity Loss(<0.1 bits/sec/Hz).