An UWB Conical Monopole Antenna for Multiservice Wireless Applications

A novel formation of a conical monopole antenna is presented for ultra-wideband (UWB) and multiple other wireless services. The proposed antenna design is compatible with many wireless standards, including Wi-Fi (2.4 GHz), Bluetooth (v1.0-v4.0), WiMAX (similar to 2.5 - 5.5 GHz) and Bluetooth 4.0 or Wireless USB (3.1-10.6 GHz). It is also has a suitable frequency response for close range radar and satellite communication in the X band (similar to 8 - 12 GHz) and K-u band (similar to 12 - 18 GHz) applications. The proposed design is approximately 0.24 lambda in length with respect to the lowest frequency boundary at the 2.4 GHz Wi-Fi band. The structure consists of two mechanical parts, which are the cone and a cylindrical block (disc). The proposed conical monopole antenna displays a fractional bandwidth of 8.3: 1 and a simulated maximum efficiency of over 95% across the whole frequency range. The radiation patterns are largely omnidirectional. Furthermore, it displays a useful level of gain across the impedance bandwidth and the time domain response indicates promising performance for radar and impulse radio. In short, the proposed conical monopole offers ultra-broad bandwidth with omnidirectional radiation patterns, in a reasonably small and easy to construct structure.