నైరూప్య

Dual Band Antenna Design for Pulse Shapping in UWB Cognitive Radio

N.Vishnuvardhan, B.Priyalakshmi

UWB is characterized by an unique potential in short range high data rate wireless communications . it is mainly used in different applications such as military, radar and it's carried by transmitting short pulses , Uwb is limits to low energy levels so therefore the federal communication committee (FCC) release spectral mask emission power in 2002. The uwb ranges from 3.1GHZ - 10.6GHZ commercially used as per FCC. In this we have a problem of interference in system using same frequency band so we proposed an monopole antenna with circular shaped with complementary split ring slots in feed line which will have better matching impedances at high frequencies .in this we have two antenna one with rectangular split ring slots in feed line and other was circular split ring slots in patch . The monopole antenna was invented by "guglielmo marconit ".This monopole antennas will transmits for a longer distances . In this we made bends over the edges for better matching and also have multiband characteristics' .