A Multiple Input Multiple Output (MIMO) antenna consisting of two 90◦ angularly separated semicircular monopoles with steps for Bluetooth, Wi-Fi, Wi-MAX and UWB applications is proposed. Initially, an array of two coplanar circular monopoles with element separation of 25 mm is investigated. In this configuration, mutual coupling is < −5 dB and < −10 dB over 2 GHz–3 GHz and 3GHz–10.6GHz, respect...
