Abstract
Abstract
Ultra Wide Band (UWB) is first-class famous technology in recent wireless communication since it affords excessive data rates and excellent high-quality offerings. FCC (Federal Communications Commission) opens a 7.5 GHz spectrum (extending 3.1 GHz - 10.6 GHz) in 2002 for wireless ultra-wide band system [1]. With high data rates of wireless communication technology, UWB is increasingly advancing and the micro-strip antenna is also being developed with bandwidths of 1 to 5%. However, within the ultimate decade, UWB has additionally been proposed as a RF energy harvester. The strategies which enhance bandwidth are one of the popular research areas in patch antenna’s field. The bandwidth is generally described as just a percent of the width of the desired frequency range and the resonant antenna frequencies. Other constraint like return loss, efficient radiation and VSWR (voltage standing wave ratio) are also accustomed to describe the bandwidth of a micro-strip antenna. Several things need to be considered into account in choosing an ideal aerial for Ultra-Wide Band including physical structure, performance and frequency band, and radiation quality and emission pattern.The major issue in UWB antenna system is to achieve only the wide bandwidth with high levels of radiation efficiency and compact size. So several method have been extensively investigated for the wide bandwidth of patch antenna and to optimize the qualities of array antenna, as described in various published articles in this survey paper.