UWB antenna for wireless communication and detection applications

Several ultrawide band (UWB, 3.1-10.6 GHz) antennas are presented for either wireless communications or detection applications. An UWB antenna could be either a planer structure for portable devices or has a 3D configuration, which is suitable for an access point. Dielectric resonator is used to tremendously shrink an UWB antenna´s size, which is important for a terminal device. Different DR loading schemes of a planer UWB antenna is discussed. The application of such a DR UWB antenna in breast cancer detection is also investigated. For wireless communication, antenna techniques to reject the interferences from WLAN bands are presented for printed UWB antennas. Lastly, an omnidirectional UWB antenna with a nonplaner structure is presented for an UWB access point.