Abstract
In this paper we have designed and done the performance analysis on rectangular slot Vivaldi antenna for breast cancer. In this we added rectangular slots and semi-circular on basic Vivaldi antenna to improve the performances of Vivaldi antenna. We are extended our analysis by examine basic Vivaldi antenna by adding different slots like circles, semi circles and rectangular slots implemented in different position on Vivaldi antenna. The proposed rectangular slot Vivaldi antenna is designed with thickness of 1.6mm and FR4 as a substrate which is cheaper when compared to other materials. The proposed antenna is resonated at multiple bands from 19 to 24 GHz (k-band) ,11.5 to 16 GHz (ku-band),9 to 11 GHz(x-band) and 2.5 to 7.5 GHz (c-band). For all the above bands s11 parameter is less than -10dB (s11<-10dB) which indicates 90% of power is transmitted from the antenna. The directivity of antenna is more than 4.5dB.
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