DESIGN AND ANALYSIS OF INSCRIBED FRACTAL SUPER WIDEBAND ANTENNA FOR MICROWAVE APPLICATIONS
Dipika Sagne, Rashmi A. Pandhare
Abstract
This paper presents the design of a Super Wideband (SWB) antenna with enhanced bandwidth for microwave applications with a detailed parametric study of the methods used to enhance the bandwidth of the conventional antenna. The proposed SWB antenna has emerged from a traditional circular monopole antenna by experimenting with an inscribed fractal structure with a tapered feed line and partial ground plane with blended corners and achieved a super wideband frequency range from 2.31 GHz to 105.5 GHz with a fractional bandwidth of 192.1% and a Bandwidth Dimension Ratio (BDR) of 2154.88. The antenna has a relatively small electrical dimension, i.e., 0.33 0 0.27 0 , where 0 corresponds to the lower-end operating frequency and exhibits good gain and efficiency characteristics. In order to observe the signal correlation of the proposed antenna, the time domain analysis using similar antennas in face-to-face and side-to-side scenarios has been performed using the EM simulation tool CST-STUDIO. The simulated gain varies from 1.28 to 9.35 dBi. The proposed antenna can be used for S, C, X, Ka, Ku, V, and W bands for microwave and millimetre wave applications. The simulated and measured results of the proposed antenna exhibit a good agreement.