Ultra-Wideband (UWB) is a communication standard which uses techniques that spread the radio energy over a frequency range of 3.1 to 10.6 GHz. The spectral density is very low of this UWB.. It occupies bandwidth of more than 25% of a centre frequency or more than 1.5 GHz. In the past few years UWB have earn a great deal of reflection in radiance of their benefits, for example, information rate is high, little production control, basic equipment arrangement and minimum effort. Ultra-Wideband (UWB) innovation since the 1980s, it has been mostly utilize for radar applications as of recently in light of the ultra wideband idea of the flag that outcomes in especially exact arrangement data.
Because of its vast applications in wireless communications, many attempts have been made in the past few years to retain the efficiency of UWB that is being affected by interference. This interference is caused by the WLAN and WiMAX. The basic structure of the monopole radio wires (antenna) had made them immense positive attributes in UWB applications. Be that as it may, because of undesirable current propagation on ground area, they experience the effects of radiation pattern turn in various frequencies and transitory noise and distortion .Also it is required to stop the bands of WLAN and WiMAX so that the UWB band can be efficiently used.
The mostly used technique to alleviate this interference is to use EBG (electromagnetic bandgap) structures. Besides this, some Ultra Wide Band antenna’s with notch filtering effects have been considered but their structures were complex and costly. So the most preferable way is to use EBG structures. The mushroom like EBG structures are placed with antenna. Number of EBGs is used according to our requirements. Herr with and without EBGs, radiation patterns of ultra wide band antenna are compared. By inserting EBGs the required bandstop is achieved.