Small high performance ultra wideband UHF multipurpose planar antenna

In this paper, we present the design and development of a small, high performance, compact Ultra Wideband antenna, resonating on a wide range of commonly used Ultra High Frequency (UHF) bands. The antenna´s bandwidth ranges from 1.22GHz to above 3GHz. The ultra wide bandwidth was achieved by dispersing the current fed into the feeding block of the antenna into different directions and loops. The antenna has a good omni-directional radiation pattern throughout the operational bandwidth, with a reasonable gain, and a small compact structure, which makes it suitable for many compact wireless devices like global positioning systems, wireless LANs, bluetooth, amateur radios and many others.