Band-notched inverted-cone monopole antenna for compact UWB systems
A microstrip-fed planar ultra-wideband monopole antenna with band-notch characteristics is proposed. The antenna size is compact (18×30 mm) and operates over an extremely wide band of 3–16 GHz. The proposed design consists of an inverted cone as the radiating patch and a tapered ground plane. Wideband matching is obtained by properly shaping the ground. A pair of symmetrically placed quarter wave slot resonators is embedded in the ground plane for rejecting the 5–6 GHz WLAN band. Results indicate a stable and omnidirectional radiation pattern with an average gain of 3 dBi and a sharp reduction in gain at notched frequencies. Moreover, measured group delay and transmission characteristics show excellent transient response.
