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This article reviews the state of the art in broadband antennas for emerging UWB applications and addresses the important issues of the broadband antenna design for UWB applications. First, a variety of planar monopoles with finite ground planes are reviewed. Next, the roll antennas with enhanced radiation performance are outlined. After that, the planar antennas printed on PCBs are described. A directional antipodal Vivaldi antenna is also presented for UWB applications. Last, a UWB antenna for wearable applications is exemplified
Cheng, Z., Ammann, M., Qing, X., Wu, H., See, S., Cai, A.: Planar antennas. IEEE Microwave Magazine, 2006, Vol.7, issue 1, pp.63-73.