A Compact Size Reconfigurable Antenna for Ultra-Wideband Applications

This paper presents a simpler method of designing a compact size reconfigurable antenna useful for ultra-wideband applications. The reconfigurability of the antenna designed was achieved by using the concept of open-circuit and short-circuit so only single structure was designed and reconfigurability of frequency was achieved. The substrate on which the antenna was to be designed was taken as Taconic(TLY) and the ground part was taken as Copper.The feed was given through the lumped port at 18mm in the XZ plane from the origin of the 3-dimensional co-ordinates i.e the starting left point of the substrate. Due to reconfigurable ability of the antenna four bands were obtained namely band-I (7.1GHz-10.8GHz) ,band II (7.3GHz-11.3GHz.), band III (12.8GHz-15.6GHz) & band-IV(17.3GHz -18.8 GHz) with corresponding return losses of -33, -25.4 and -25.9 dB respectively.