An UWB slot antenna with band-notched characteristics for MIMO/diversity applications

A novel pattern diversity slot antenna for ultra-wideband (UWB) application with band-notched characteristics is presented. Two modified coplanar waveguides (CPW) are used to feed the staircase-shaped radiating elements respectively, which generate orthogonal radiation patterns. One rectangle stub placed at 45 degrees axis between the two coplanar waveguides ensures the isolation above 15 dB. Two half-wavelength split-ring resonator (SRR) slots are etched on the radiators respectively, to achieve a notched WLAN band. The measured results show that the proposed antenna meets a bandwidth from 3.1 to 10.6 GHz defined by return loss ≤ -10 dB with the notched band of 5.15 to 5.9 GHz. Radiation patterns and envelope correlation coefficient (ECC) denotes it is suitable for diversity systems.