ABSTRACT
Modified Slit-Ring Resonators (SRR) are used develop a high gain Ultra Wide Band (UWB) antenna for microwave imaging applications. This paper analyzes patch radiator with modified SRR with the rectangular slotted ground. Two SRRs are placed on the circular radiator patch element, each in the shape of alphabet letters ‘S’ and ‘V’. The results of the with DGS demonstrate that the reflection coefficient is well below -10 dB in the frequency range from 1.9 GHZ to 11.9 GHz with the fractional bandwidth of 110%. Further modification in the resonant modes of UWB is obtained by adding single rectangular slot on the ground plane. This helps in eliminating the lower band from 1.9 GHz to 6 GHz. This band rejection helps in alleviating the interferences caused by other unlicensed wireless applications lying in sub 6GHZ band
