Design of MIMO Triangular Microstrip Patch Antenna for IEEE 802.11a Application

Abstract

A compact multiple-input-multiple-output (MIMO) antenna for wireless local area network (WLAN) applications with dual-band characteristics is presented. The proposed antenna is composed of two microstrip line-fed fractal triangular microstrip antenna. To achieve good return and high isolation, a Z-shaped stub is added in the ground plane. To reduce the mutual coupling and ECC, a Z-shaped stub is added to the ground plane. The proposed antenna covers the bandwidths of WLAN 5.2 GHz (5.11–5.23 GHz) and 5.8 GHz (5.72–5.92 GHz). A high isolation over −25 dB is achieved for both the IEEE 802.11a bands. The MIMO antenna return loss, envelope correlation coefficient, gain and radiation characteristics are also investigated. The results indicate that the MIMO antenna is suitable for WLAN applications. The geometry of the proposed dual-band WLAN MIMO antenna has an overall size of 68 × 26 × 1.6 mm3.