A compact dual band MIMO antenna for WLAN applications

Abstract

A dual band MIMO antenna has been proposed for WLAN applications. The antenna comprises of two cup-shaped mounted with T-shaped structure monopole antennas placed parallel to each other with separated ground planes. The antenna is printed on an FR4 substrate of size 40 mm × 40 mm, both the antennas are fed with 50 Ω microstrip lines. The antenna operates at two WLAN bands including the IEEE 802.11 2.4 GHz (2.4–2.484 GHz) and 5.2 GHz (5.15–5.35 GHz). The isolation between the two antennas is provided by a microstrip line in ground plane separating the two antenna elements. The proposed antenna with compact size, simple design and good diversity performance as the value of envelope correlation coefficient remains below 0.003 in both the bands of operation is good for MIMO applications. The proposed scheme can drastically improve the performance of MIMO communications because of exploiting the diversity.