Wideband tri-port MIMO antenna with compact size and directional radiation pattern

Abstract

A wideband tri-port multiple-input-multiple-output (MIMO) antenna designed for worldwide interoperability for microwave access (WiMAX) and wireless local area network (WLAN) applications is presented. The proposed antenna is composed of three printed dipoles with an integrated balun, the size of which is only 0.08λ2. By introducing ground stubs between adjacent elements, impedance matching is improved and mutual coupling is reduced. A bandwidth of 51.6% (2.30-3.90 GHz) with S11