Published Paper Details:

In the past few years, Ultra-wide band technology has become a major area of study due to its merits such as low-power requirement, large channel capacity thus high data-rate, less sensitivity to the multipath effect and jamming resistance. As a result of these merits, they are being used in applications like short-range indoor communications, cognitive radio, sensing and imaging systems, radar, target localisation and characterisation, automotive applications etc. Another major emerging field of interest is the reconfigurable antennas because of their low cost and low profile characteristics. A major problem faced by Ultra-wide band technology is the overlapping of the narrow and wideband signals when a number of devices are connected simultaneously leading to interference problems. This issue of electromagnetic interference can be addressed by merging the Ultra-wideband technology with the concept band-rejection, which can be implemented with reconfigurable antennas. This new technology can be applied for WiMax and Wi-fi applications. The concept of band-rejection is made possible by using switching elements like PIN diodes, varactor diodes, radiofrequency (RF) micro electro mechanical system (MEMS), GaAs-field� effect transistors and optically controlled switches. Most of the already existing antennas are either capable of rejecting or tuning single band only (Wimax or WLAN separately) or they do not support full Ultra-wide band technology (no rejection) mode. In order to overcome these disadvantages, a simple, planar and easy to control Ultra-wideband antenna with on-demand rejection capability is proposed. In our proposed system compact design and analysis of reconfigurable notch band antenna using DGS for UWB (3.1-10.6 GHz) applications is proposed. The basic design has main feature to reduce interference from narrow band frequencies and the design has ability to recall notch bands according to different states of switches placed on defected ground plane.