Hexagonal tree shaped ultra–wideband fractal antenna

ABSTRACT

A compact hexagonal tree shaped fractal antenna for ultra–wideband (UWB) applications is presented. The bandwidth has been enhanced by using modified feedline and semi-circular ground plane. The impedance bandwidth of 2.5–16 GHz (146%) has been achieved. The proposed second iteration fractal antenna has nearly omnidirectional patterns at its resonance frequencies with an average gain of 4 dB. The simulation and experimental results are found to be in good agreement. The antenna exhibits better reflection coefficient performance along with reduced dimensions as compared to ones reported earlier.

KEYWORDS:

• Fractal antenna
• hexagonal tree shaped antenna
• semi-circular ground plane
• tapered feedline
• UWB applications

Acknowledgment

Sarthak Singhal and Tushar Goel are very thankful to the Ministry of Human Resources and Development for providing the financial assistance in the form of Teaching Assistantship.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the Ministry of Human Resources and Development for providing the financial assistance in the form of Teaching Assistantship.