A novel omni-directional UWB biconical antenna with band-notched

A novel omni-directional Ultra-Wide Band (UWB) biconical antenna with band-notched is described. Firstly, the biconical antenna in the shape of two kinds of bicone placed above a flat ground plane is designed. The antenna operates from 2.4-20 GHz with low Voltage Standing Wave Ratio (VSWR<;2), excluding a band-notched frequency at 5-7GHz. Then in order to improve the structure of the ground plane for miniaturization without degrading the VSWR, ground plane shaping is introduced leading to an antenna that operates from 2.4-20 GHz with low VSWR (<;2) too. The biconical antenna is fed by a coaxial probe through a SMA connector. The length of the proposed biconical element above the ground plane is slightly less than λ/4 at the lowest frequency in the band. Simulation results for VSWR and radiation pattern of the three antennas are presented and discussed.