Flower-shaped ultra-wideband fractal antenna

Abstract

A flower-shaped ultra-wideband fractal antenna is presented. It comprises a fourth iterative flower-shaped radiator, asymmetrical stub-loaded feeding line, and coplanar quarter elliptical ground planes. A wide operating band of 12.12 GHz (4.58-16.7 GHz) for S11 ≤ − 10 dB is achieved along with an overall antenna footprint of 15.7 × 11.4 mm2. In addition, other desirable characteristics, that is, omnidirectional radiation patterns, peak gain upto 5 dB, and fidelity factor more than 75% are achieved. A good agreement exists between the simulation and measured results. The obtained results illustrate that this antenna has wide operating range and compact dimensions than available structures. © 2019 Wiley Periodicals, Inc.