Design of a Miniaturized UWB-MIMO Antenna with Four Notched-Band Characteristics

With four rejected bands, a miniaturized ultrawideband multiple-input-multiple-output (UWB-MIMO) antenna is presented. Four notched bands are realized by applying three pairs of L-shape slots and two symmetrical C-like metal stubs. Thus the system can relief latent interference from 3.5GHz WiMAX/5.3 GHz lower WLAN/5.8GHz upper WLAN/8.1GHz X-band. To minimize port coupling and covering 3.1-10.6GHz UWB band, a T-like metal stub is designed in the ground plan. The results proves that the antenna has four rejected bands across the working band of 3.1 similar to 11GHz. Moreover, the antenna has compact volume of 21 x 27 x 0.8 mm(3), better than-18 dB port isolation, preferable radiation pattern and gentle gain.