Design and Analysis of Ring Shaped UWB Microstrip Patch Antenna with Coplanar Waveguide Fed

A compact ultawideband antenna (UWB) is presented here with ring shaped structure consisting of triangular shaped patch in centre of ring. The antenna is fabricated onto Rogers R03003 substrate with an overall dimension of 47X47 mm. The substrate has dielectric constant of 3 and thickness of 1.6mm. The antenna is fed by a coplanar waveguide in order to have low radiation loss and impedance match. The simulated experiment shows that the proposed antenna achieves good impedance matching over an operating bandwidth of 2.22.7 GHz (20 %) and 3.2-15 GHz (129.67 %) that covers the entire UWB band. Its gain varies between 1.5 to 3 dBi for most of the frequency band. This makes the proposed antenna suitable for being used in UWB communication applications