Design and Analysis of a UWB-MIMO Antenna with Quintuple Notched-Band Ability and Hybrid Decoupling Methods

In the paper, a UWB-MIMO antenna with quintuple notched-band ability is proposed. Four CCSRR slots and a couple of C-like stub are engraved to avoid five frequency bands at 3.4-4 GHz, 5.2-5.7 GHz, 5.9-6.3 GHz, 7.5-7.9 GHz and 8.3-8.9 GHz. Thus the system has refusal ability at WiMAX, lower WLAN, upper WLAN, low side band of X-band and upside band of X-band. Mutual coupling was suppressed and the isolation was more than 20 dB by means of three decoupling methods(cutting a triangular shape on upper patch, etching a ground slot and adding a candied haws shaped stub). The entire UWB-MIMO antenna has a smart size of 30 x 44 mm(2) and works in 3-11 GHz band. Design principles, parameter analysis are further studied. The result data of S-parameters, far-field E-plane and H-plane patterns, ECC, DG, gain, and efficiency indicate that the proposed antenna is a satisfactory candidate in practical use of UWB.