Compact reconfigurable Ultra Wide band antenna design for wireless communication

This paper propose a novel design for multiband reconfigurable Ultra Wideband (UWB) antenna which can be used for spectrum sensing in cognitive wireless applications. The compact reconfigurable UWB antenna (CRUWBA) proposed is having an excellent matched structure. The radiating patch of the CRUWBA consists of seven regular hexagons united with a circular ring. The CRUWBA is operational in nearly the entire UWB spectrum spanning from 3.1 GHz to 10.6 GHz, and achieves a gain up to 5.8 dB. Within the UWB spectrum, the antenna is capable of operating in five different bands. The operational bands are: band 1 [3-4.3GHz, 5-9 GHz], band 2 [3-3.5GHz, 4.9-6.2 GHz, 7.2-8.9 GHz], band 3 [3-3.8 GHz, 6.7-8.6 GHz], band 4 [3.9-6.1 GHz, 7.4-8.9 GHz] and band 5 [3-4.2 GHz, 4.8-5.7GHz, 6.3-8.4 GHz]. The CRUWBA achieves reconfigurability by employing three switches, and hence have eight switching cases. By analyzing the results, the antenna proves to be satisfying the performance criteria. All the simulations were carried out in Ansoft High Frequency structure simulator (HFSS).