Abstract: A new planar UWB antenna with microstrip feed and triangular band notched characteristics is proposed.The shapes of radiation element and ground plane are exactly the same.The parasitic element is on the back of the radiation element to obtain the band-notched function and its parameters are studied in detail.Simulation results show that the band-notched function can be realized by the size of the parasitic element.The notched band can be changed by adjusting the size of the parasitic element.The antenna is...