A compact, circular UWB fractal antenna with triple reconfigurable notch rejection bands is proposed. It rejects the crowded frequency bands WiMAX, WLAN and X band interferences produced in UWB communication systems. The proposed fractal structure consists of a basic circular patch with circular fractal iterations. By employing this new structure of fractals, the overall size of antenna is reduced 53% to 21 × 25 mm, in comparison with traditional circular monopole antenna. The implemented antenna operates at 3.1–10 GHz. Re-configurability is realized by designing slots and split ring resonators in desired frequencies with the attached PIN diodes. WLAN band rejection was realized by creating a pair of optimized L-shaped slots in the ground plane. By etching a split ring resonator and a U-shaped slot, X and WiMAX bands were also rejected. Furthermore, by attaching diodes to aforementioned slots and designating the diodes on/off, different bands can be included or rejected. In time domain, the antenna properties are evaluated by a figure of merit called fidelity factor. Finally, the antenna properties are measured in anechoic chamber and the results agrees with simulation findings.
History
School
Mechanical, Electrical and Manufacturing Engineering
Published in
AEU - International Journal of Electronics and Communications
Volume
101
Pages
1 - 8
Citation
NAZERI, A.H., FALAHATI, A. and EDWARDS, R.M., 2019. A novel compact fractal UWB antenna with triple reconfigurable notch reject bands applications. AEU - International Journal of Electronics and Communications, 101, pp.1-8.
This paper was accepted for publication in the journal AEU - International Journal of Electronics and Communications and the definitive published version is available at https://doi.org/10.1016/j.aeue.2019.01.018.