DESIGN OF COMPACT PRINTED 2x1 UWB-MIMO MONOPOLE ARRAY WITH DUAL BAND-REJECTION NOTCHES

Abstract

In this dissertation, a compact printed 2x1 ultra wideband (UWB) monopole antenna for multiple-input-multiple-output (MIMO) system with a size of 32x19 mm2 operating at frequency range of 3.1-10.6 GHz is proposed. To introduce band-rejection notches at 5.2 GHz and 5.8 GHz WLAN bands, co-directional complimentary split ring resonators (CSRRs) have been used. Measured S-parameters show that the isolation is better than 10 dB across the UWB of 3.1-1 0.6 GHz. For double notch antennas, a gain of 1-3.8dB is obtained over most of the operating band except at the notch frequencies where there is a sharp dip in the gain. Group delay is more only at the band notched frequencies while group delay is less at other frequencies, causing less distortion to the transmitted pulse. Fidelity of 0.89 for modulated Gaussian pulse is obtained.