This book comprehensively reviews ultra-wideband and ultra-wideband MIMO antennas with band notched characteristics with a focus on interference cancellation. The book has been organized into seven chapters that covers Single-band, Dual-band and multi-band notched Ultra-wideband Antennas followed by Band-Notched Characteristics in Ultra-Wideband MIMO Antennas. Further, it explains reconfigurable-band notched and tunable-band Notched Ultra-wideband Antennas including advanced applications of Ultrawideband Systems. Overall, it covers different techniques of cancelling the electromagnetic interference in ultra-wideband (UWB) in a concise volume. This book: Provides a comprehensive presentation of avoiding interference in Ultra-Wideband (UWB) systems. Reviews state of the art in UWB antennas, filtennas and various tunable technologies. Explains different techniques for producing band-notch characteristics in UWB systems. Includes discussion on historical perspectives of UWB Technology. Consolidates different research activities carried out on the electromagnetic interference cancellation techniques in the UWB communication systems. Band-Notch Characteristics in Ultra-Wideband Antennas is aimed at researchers and graduate students in Electrical and Antenna Engineering.