Abstract
<span>A coplanar waveguide</span><em></em><span>fed ultra-wideband antenna with extended transmission band to WLAN frequency is investigated. The proposed antenna consists of a modified </span><span>semi-</span><span>circular patch and staircase of ground plane. The prototype is fabricated on a low cost FR4 substrate with dielectric constant of 4.4</span><span> with thicknes of 0.8 mm. The overall dimensions of proposed UWB antenna are </span><span>34 mm x 40 mm. The simulation and experimental results have been shown that the proposed antenna archives low VSWR over transmission bandwidth from 2.10 - 12.7 GHz to cover both WLAN and UWB bands. The average gain is 3.87 dBi. It depicts nearly omni-directional radiation pattern like dipole antenna. Moreover, the fabricated prototype antenna shows a good agreement between the simulated and measured results</span>
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