Mutual Coupling Reduction of Dual-Band Uni-Planar MIMO System Using Neutralization Line Technique

摘要

This paper presents a low-profile dual-band(2x2) MIMO antenna that works at 2.4GHz, 5.2GHz and 5.8GHz for wireless local area networks (WLAN) applications. A neutralization line technique for enhancing the isolation is used by introducing a strip line with a length of lambda(g)/4 at the isolation frequency (2.4GHz) between the radiating elements. The overall dimensions of the proposed antenna are 36x33.5x1.6 mm(3). The antenna is fabricated and tested to validate the simulation results. The practical results show fair agreements with the simulated outcomes. The antenna achieves impedance bandwidths from 2.15GHz to 2.52GHz and from 4.5GHZ to 6.45GHz for reflection coefficient vertical bar S11 vertical bar < -10dB. On the other hand, the result of S21 for the two bands is better than -10dB and it has reached to -25dB around 2.4GHz and -35dB around 5.5GHz. The MIMO antenna performance characteristics are reported in terms of scattering parameters, envelope correlation coefficient (ECC), total active reflection coefficient (TARC), channel capacity loss (CCL), diversity gain (DG) and antenna radiation patterns. Analysis of these characteristics indicates that the design is appropriate for the WLAN.