Comparative Analysis of Integrated Wideband/Narrow Band Antenna for Cognitive Radio Applications

Abstract

Cognitive radio is an inventive system to wireless technologies in which radios are designed with an astonishing level of intelligence and agility. This handles the available spectrum in an expedient manner to avoid spectrum scarcity. The cognitive radio antenna consists of integrated wideband and narrow band antenna in same substrate which is taxing task. A UWB antenna is pondered for the wide band operation which has the bandwidth of 7.5 GHz respectively is used for sensing vacant slots in the spectrum. For narrowband antenna the frequency and pattern reconfigurable antenna is usually suggested which is used for transmission of data through the vacant slots from the outcomes of sensing antenna. In this paper the various cognitive radio antennas are investigated in tremendously.