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The demand for wireless wideband communications is rapidly increasing due to the need to support more users and to provide more information with higher data rates. Ultra wideband (UWB) technology based on the use of very narrow pulses on the order of nanoseconds, covering a very wide bandwidth in the frequency domain, could be a possible solution to this problem. UWB is a wireless technology developed to transfer data at high rates over very short distances at very low power densities and an area of immense current interest, with numerous potential applications. This paper presents the currently UWB technology and its potential applications. How this technology implemented without causing interference to other existing communication is also discussed. The advantages and disadvantages of this technology are looked into deep as well.