Authors: Rajeshkumar Venkatesan; Rajkumar Rengasamy
Addresses: Department of Communication Engineering, School of Electronics Engineering (SENSE), Vellore Institute of Technology (VIT), Vellore 632014, India ' Department of Communication Engineering, School of Electronics Engineering (SENSE), Vellore Institute of Technology (VIT), Vellore 632014, India
Abstract: A very compact coplanar waveguide (CPW)-fed fractal monopole antenna with a modified ground plane is presented. The main objective is to obtain ultra wideband (UWB) characteristics from a simple microstrip monopole antenna. A wideband behaviour and good impedance matching are obtained by modifying the ground plane to semi-trapezoidal shape. Further, the self-similar fractal nature is introduced in the radiating element to enhance the bandwidth. The proposed antenna shows a wider impedance bandwidth from 3 GHz to 11.2 GHz for S11 −10 dB. A fractional bandwidth of about 115.5% (impedance bandwidth ratio 3.73:1) is achieved for the third fractal iteration. The total volume of the presented antenna is 18×12×1.6 mm³. The measurements are carried out to validate the simulations and the performance of the proposed antenna is analysed.
Keywords: CPW; fractal antenna; self-similar; UWB; ultra wideband; wireless communications.
International Journal of Wireless and Mobile Computing, 2019 Vol.16 No.1, pp.66 - 71
Received: 08 Aug 2018
Accepted: 17 Sep 2018
Published online: 16 Jan 2019 *